Annotation of embedaddon/quagga/NEWS, revision 1.1

1.1     ! misho       1: * Changes in Quagga 0.99.10
        !             2: 
        !             3: - [bgpd] 4-byte AS support added
        !             4: - [bgpd] MRT format changes to version 2. Those relying on
        !             5:   bgpd MRT table dumps may need to update their tools.
        !             6: - [bgpd] Added new route-map set statement: "as-path exclude"
        !             7: - Zebra RIB updates queue has evolved into a multi-level
        !             8:   structure to address RIB consistency issues.
        !             9: 
        !            10: * Changes in Quagga 0.99.2
        !            11: 
        !            12: - [bgpd] Work queues added to bgpd to split up update processing,
        !            13:   particularly beneficial when a peer session goes down. AS_PATH
        !            14:   parsing rewritten to be clearer, more robust and ready for 4-byte.
        !            15: 
        !            16: - [ripd] Simple authentication is no longer the default authentication
        !            17:   mode for ripd. The default is now no-authentication. Any setups which
        !            18:   used simple authentication will probably need to update their
        !            19:   configuration manually.
        !            20: 
        !            21: - [ospfd] 1s dead-interval with sub-second Hellos feature added.
        !            22:   SPF timers now specified in milliseconds, and with adaptive
        !            23:   hold-time support. RFC3137 Stub-router support added. Default ABR
        !            24:   type is now 'cisco'.
        !            25: 
        !            26: - Solaris least privileges support added.
        !            27: 
        !            28: * Changes in Quagga 0.99.1
        !            29: 
        !            30: - Zserv is now buffered via threads and non-blocking in most cases for both
        !            31:   clients and zebra, which should improve responsiveness of daemons when
        !            32:   they must send many messages to zebra.
        !            33: 
        !            34: - 'show thread cpu' now displays both cpu+system and wall-clock time,
        !            35:   where getrusage() is available.
        !            36: 
        !            37: - Background threads added and workqueue API added, with a
        !            38:   'show work-queues' command. Thread scheduling improved slightly.
        !            39: 
        !            40: - Zebra now has a work-queue for RIB processing. See 'show work-queues' in
        !            41:   the zebra daemon vty.
        !            42: 
        !            43: - Support for interface renaming on Linux netlink systems.
        !            44: 
        !            45: - GNU Zebra bgpd merges, including BGP Graceful-restart and "match ip
        !            46:   route-source" command.
        !            47: 
        !            48: - Automatic logging of backtraces should daemons crash to assist in
        !            49:   diagnosis. See the documentation for more information on configuring
        !            50:   logging correctly, and set --enable-gcc-rdynamic if compiling with gcc.
        !            51: 
        !            52: * Changes in Quagga 0.98.0
        !            53: 
        !            54: - Logging facilities upgraded.  One can now specify a severity level
        !            55:   for each logging destination.  And a new "show logging" command gives
        !            56:   thorough information on the current logging system configuration.
        !            57: 
        !            58: - Watchquagga daemon added.  This is not well tested yet.  Please try
        !            59:   monitor mode first before enabling restart features.  It is important
        !            60:   to make sure that the various timers are configured with appropriate
        !            61:   values for your site.
        !            62: 
        !            63: - BGP route-server support added. See the texinfo documentation.
        !            64: 
        !            65: - OSPF API initialisation is disabled by default even if compiled in. You
        !            66:   can enable it with -a/--apiserver command line switch.
        !            67: 
        !            68: - "write-config integrated" vtysh command replaced with "service
        !            69:   integrated-vtysh-config" command.
        !            70: 
        !            71: - Router id is now handled by zebra daemon and all daemons receive changes
        !            72:   from it. Router id can be overriden in daemons' configurations of course.
        !            73:   To fix common router id in zebra daemon you can either install non-127
        !            74:   address on loopback or use "router-id x.x.x.x" command.
        !            75: 
        !            76: - "secondary" keyword is removed from ip address configuration. All
        !            77:   supported OS'es have their own vision what's secondary address and
        !            78:   how to handle it.
        !            79: 
        !            80: - Zebra no longer enables forwarding by default. If you rely on zebra to
        !            81:   enable forwarding make sure to add '<ip|ip6> forwarding' statements
        !            82:   to your zebra configuration file.
        !            83: 
        !            84: - All libraries are built and used shared, on platforms where libtool
        !            85:   supports shared libraries.
        !            86: 
        !            87: - Router advertisement syntax is changed. In usual cases (if you didn't do
        !            88:   any fancy stuff) it's enough to change lines in configuration from:
        !            89:   "ipv6 nd prefix-advertisement X:X:X:X::/X 2592000 604800 autoconfig on-link"
        !            90:   to:
        !            91:   "ipv6 nd prefix X:X:X:X::/X"
        !            92: 
        !            93:   All router advertisement options are documented in texi documentation.
        !            94: 
        !            95: - --enable-nssa configure switch is removed. NSSA support is stable enough.
        !            96: 
        !            97: - Daemons don't look at current directory for config file any more.
        !            98: 
        !            99: * Changes in Quagga 0.96.5
        !           100: 
        !           101: - include files are installed in $(prefix)/include/quagga.  Programs
        !           102:   building against these includes should -I$(prefix)/include and e.g.
        !           103:   #include <quagga/routemap.h>
        !           104: 
        !           105: - New option --enable-exampledir puts example files in a separate
        !           106:   directory from $(sysconfdir), easing NetBSD pkgsrc hierarchy rules
        !           107:   compliance.
        !           108: 
        !           109: - New configure options --enable-configfile-mask and
        !           110:   --enable-logfile-mask to set umask values for config and log
        !           111:   values.  Masks default to 0600, matching previous behavior.
        !           112: 
        !           113: - Import current CVS isisd from SourceForge, then merge it with
        !           114:   the Quagga's Framework.
        !           115: 
        !           116: * Changes in Quagga 0.96.4
        !           117: 
        !           118: - Further fixes to ospfd, some relating to the PtP revert. Interface
        !           119: lookups should be a lot more robust now. 
        !           120: 
        !           121: - Fix for a remote triggerable crash in vty layer.
        !           122: 
        !           123: - Improvements to ripd, and addition of split horizon support.
        !           124: 
        !           125: - Improved bgpd table support, now dumps at time of day intervals rather
        !           126: than time from startup intervals. Much improved support for IPv6 table
        !           127: dumps. show commands for views improved.
        !           128: 
        !           129: * Changes in Quagga 0.96.3
        !           130: 
        !           131: - revert the 'generic PtP' patch. Means Quagga will no longer work with
        !           132: FreeSWAN, however, on the plus side this gets rid of a lot of niggly bugs
        !           133: which the PtP patch introduced.
        !           134: 
        !           135: * Changes in Quagga 0.96.2
        !           136: 
        !           137: - Fix crash in ospfd
        !           138: 
        !           139: * Changes in Quagga 0.96.1
        !           140: 
        !           141: - Iron out problem with the privileges definitions
        !           142: 
        !           143: * Changes in Quagga 0.96
        !           144: 
        !           145: - Privilege support, daemons now run with the minimal privileges needed, see
        !           146:   the documentation for details.
        !           147:   
        !           148: - NSSA ABR support in ospfd.
        !           149: 
        !           150: - OSPF-API support merged in.
        !           151: 
        !           152: - 6WIND patch merged in.
        !           153: 
        !           154: * Changes in zebra-0.93
        !           155: 
        !           156: * Changes in bgpd
        !           157: 
        !           158: ** Configuration is changed to new format.
        !           159: 
        !           160: * Changes in ospfd
        !           161: 
        !           162: ** Crush bugs which reported on Zebra ML is fixed.
        !           163: 
        !           164: ** Opaque LSA and TE LSA support is added by KDD R&D Laboratories,
        !           165:    Inc.
        !           166: 
        !           167: * Chages in ospf6d
        !           168: 
        !           169: ** Many bugs are fixed.
        !           170: 
        !           171: * Changes in zebra-0.92a
        !           172: 
        !           173: * Changes in bgpd
        !           174: 
        !           175: ** Fix "^$" community list bug.
        !           176: 
        !           177: ** Below command's Address Family specific configurations are added
        !           178: 
        !           179:   nexthop-self
        !           180:   route-reflector-client
        !           181:   route-server-client
        !           182:   soft-reconfiguration inbound
        !           183: 
        !           184: * Changes in zebra
        !           185: 
        !           186: ** Treat kernel type routes as EGP routes.
        !           187: 
        !           188: * Changes in zebra-0.92
        !           189: 
        !           190: ** Overall security is improved.  Default umask is 0077.
        !           191: 
        !           192: * Changes in ripd
        !           193: 
        !           194: ** If output interface is in simple password authentication mode,
        !           195: substruct one from rtemax.
        !           196: 
        !           197: * Changes in bgpd
        !           198: 
        !           199: ** IPv4 multicast and IPv6 unicast configuration is changed to so
        !           200: called new config.  All of AFI and SAFI specific configuration is
        !           201: moved to "address-family" node.  When you have many IPv6 only
        !           202: configuration, you will see many "no neighbor X:X::X:X activate" line
        !           203: in your configuration to disable IPv4 unicast NLRI exchange.  In that
        !           204: case please use "no bgp default ipv4-unicast" command to suppress the
        !           205: output.  Until zebra-0.93, old config is still left for compatibility.
        !           206: 
        !           207: Old config
        !           208: ==========
        !           209: router bgp 7675
        !           210:  bgp router-id 10.0.0.1
        !           211:  redistribute connected
        !           212:  network 192.168.0.0/24
        !           213:  neighbor 10.0.0.2 remote-as 7675
        !           214:  ipv6 bgp network 3ffe:506::/33
        !           215:  ipv6 bgp network 3ffe:1800:e800::/40
        !           216:  ipv6 bgp aggregate-address 3ffe:506::/32
        !           217:  ipv6 bgp redistribute connected
        !           218:  ipv6 bgp neighbor 3ffe:506:1000::2 remote-as 1
        !           219: 
        !           220: New config
        !           221: ==========
        !           222: router bgp 7675
        !           223:  bgp router-id 10.0.0.1
        !           224:  network 192.168.0.0/24
        !           225:  redistribute connected
        !           226:  neighbor 10.0.0.2 remote-as 7675
        !           227:  neighbor 3ffe:506:1000::2 remote-as 1
        !           228:  no neighbor 3ffe:506:1000::2 activate
        !           229: !
        !           230:  address-family ipv6
        !           231:   network 3ffe:506::/33
        !           232:   network 3ffe:1800:e800::/40
        !           233:   aggregate-address 3ffe:506::/32
        !           234:   redistribute connected
        !           235:   neighbor 3ffe:506:1000::2 activate
        !           236:  exit-address-family
        !           237: 
        !           238: * Changes in ospfd
        !           239: 
        !           240: ** Internal interface treatment is changed.  Now ospfd can handle
        !           241: multiple IP address for an interface.
        !           242: 
        !           243: ** Redistribution of loopback interface's address works fine.
        !           244: 
        !           245: * Changes in zebra-0.91
        !           246: 
        !           247: ** --enable-oldrib configure option is removed.
        !           248: 
        !           249: ** HAVE_IF_PSEUDO part is removed.  Same feature is now supported by
        !           250: default.
        !           251: 
        !           252: * Changes in ripd
        !           253: 
        !           254: ** When redistributed route is withdrawn, perform poisoned reverse.
        !           255: 
        !           256: * Changes in zebra
        !           257: 
        !           258: ** When interface's address is removed, kernel route pointing out to
        !           259: the address is removed.
        !           260: 
        !           261: ** IPv6 RIB is now based upon new RIB code.
        !           262: 
        !           263: ** zebra can handle same connected route to one interface.
        !           264: 
        !           265: ** New command for interface address.  Currently this commands are
        !           266: only supported on GNU/Linux with netlink interface.
        !           267: 
        !           268: "ip address A.B.C.D secondary"
        !           269: "ip address A.B.C.D label LABEL"
        !           270: 
        !           271: * Changes in bgpd
        !           272: 
        !           273: ** BGP flap dampening bugs are fixed.
        !           274: 
        !           275: ** BGP non-blocking TCP connection bug is fixed.
        !           276: 
        !           277: ** "show ip bgp summary" shows AS path and community entry number.
        !           278: 
        !           279: ** New commands have been added.
        !           280:   "show ip bgp cidr-only"
        !           281:   "show ip bgp ipv4 (unicast|multicast) cidr-only"
        !           282:   "show ip bgp A.B.C.D/M longer-prefixes"
        !           283:   "show ip bgp ipv4 (unicast|multicast) A.B.C.D/M longer-prefixes"
        !           284:   "show ipv6 bgp X:X::X:X/M longer-prefixes"
        !           285:   "show ipv6 mbgp X:X::X:X/M longer-prefixes"
        !           286: 
        !           287: ** IPv6 IBGP nexthop change is monitored.
        !           288: 
        !           289: ** Unknown transitive attribute is passed with partial flag bit on.
        !           290: 
        !           291: * Changes in ospfd
        !           292: 
        !           293: ** Fix bug of LSA MaxAge flood.
        !           294: 
        !           295: ** Fix bug of NSSA codes.
        !           296: 
        !           297: * Changes in zebra-0.90
        !           298: 
        !           299: ** From this beta release, --enable-unixdomain and --enable-newrib
        !           300: becomes default.  So both options are removed from configure.in.  To
        !           301: revert old behavior please specify below option.
        !           302: 
        !           303: --enable-tcp-zebra # TCP/IP socket is used for protocol daemon and zebra.
        !           304: --enable-oldrib    # Turn on old RIB implementation.
        !           305: 
        !           306: Old RIB implementation will be removed in zebra-0.91.
        !           307: 
        !           308: ** From this beta release --enable-multipath is supported.  This
        !           309: option is only effective on GNU/Linux kernel with
        !           310: CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_ROUTE_MULTIPATH is set.
        !           311: 
        !           312: --enable-multipath=ARG  # ARG must be digit.  When ARG is 0 unlimit multipath number.
        !           313: 
        !           314: ** From this release we do not include guile files.
        !           315: 
        !           316: * Changes in lib
        !           317: 
        !           318: ** newlist.[ch] is merged with linklist.[ch].
        !           319: 
        !           320: ** Now Zebra works on MacOS X public beta.
        !           321: 
        !           322: ** Access-list can have remark.  "access-list WORD remark LINE" define
        !           323: remark for specified access-list.
        !           324: 
        !           325: ** Key of key-chain is sorted by it's idetifier value.
        !           326: 
        !           327: ** prefix-list rule is slightly changed.  The rule of "len <= ge-value
        !           328: <= le-value" is changed to "len < ge-value <= le-value".
        !           329: 
        !           330: ** According to above prefix-list rule change, add automatic
        !           331: conversion function of an old rule. ex.) 10.0.0.0/8 ge 8 -> 10.0.0.0/8
        !           332: le 32
        !           333: 
        !           334: ** SMUX can handle SNMP trap.
        !           335: 
        !           336: ** In our event library, event thread is executed before any other
        !           337: thread like timer, read and write event.
        !           338: 
        !           339: ** Robust method for writing configuration file and recover from
        !           340: backing up config file.
        !           341: 
        !           342: ** Display "end" at the end of configuration.
        !           343: 
        !           344: ** Fix memory leak in vtysh_read().
        !           345: 
        !           346: ** Fix memroy leak about access-list and prefix-list name.
        !           347: 
        !           348: * Changes in zebra
        !           349: 
        !           350: ** UNIX domain socket server of zebra protocol is added.
        !           351: 
        !           352: ** Fix PointoPoint interface network bug.  The destination network
        !           353: should be installed into routing table instead of local network.
        !           354: 
        !           355: ** Metric value is reflected to kernel routing table.
        !           356: 
        !           357: ** "show ip route" display uptime of RIP,OSPF,BGP routes.
        !           358: 
        !           359: ** New RIB implementation is added.
        !           360: 
        !           361: Now we have enhanced RIB (routing information base) implementation in
        !           362: zebra.  New RIB has many new features and fixed some bugs which exist
        !           363: in old RIB code.
        !           364: 
        !           365: *** Static route with distance value
        !           366: 
        !           367:     Static route can be specified with administrative distance.  The
        !           368:   distance value 255 means it is not installed into the kernel.
        !           369:   Default value of distance for static route is 1.
        !           370:   
        !           371:     ip route A.B.C.D/M A.B.C.D <1-255>
        !           372:     ip route A.B.C.D/M IFNAME <1-255>
        !           373:   
        !           374:     If the least distance value's route's nexthop are unreachable,
        !           375:   select the least distance value route which has reachable nexthop is
        !           376:   selected.
        !           377:   
        !           378:     ip route 0.0.0.0/0 10.0.0.1
        !           379:     ip route 0.0.0.0/0 11.0.0.1 2
        !           380:   
        !           381:     In this case, when 10.0.0.1 is unreachable and 11.0.0.1 is
        !           382:   reachable.  The route with nexthop 11.0.0.1 will be installed into
        !           383:   forwarding table.
        !           384:   
        !           385:     zebra> show ip route
        !           386:     S>* 0.0.0.0/0 [2/0] via 11.0.0.1
        !           387:     S   0.0.0.0/0 [1/0] via 10.0.0.1 inactive
        !           388:   
        !           389:     If the nexthop is unreachable "inactive" is displayed.  You can
        !           390:   specify any string to IFNAME.  There is no need of the interface is
        !           391:   there when you configure the route.
        !           392:   
        !           393:     ip route 1.1.1.1/32 ppp0
        !           394:   
        !           395:   When ppp0 comes up, the route is installed properly.
        !           396: 
        !           397: *** Multiple nexthop routes for one prefix
        !           398: 
        !           399:     Multiple nexthop routes can be specified for one prefix.  Even the
        !           400:   kernel support only one nexthop for one prefix user can configure
        !           401:   multiple nexthop.
        !           402:   
        !           403:     When you configure routes like below, prefix 10.0.0.1 has three
        !           404:   nexthop.
        !           405:   
        !           406:     ip route 10.0.0.1/32 10.0.0.2
        !           407:     ip route 10.0.0.1/32 10.0.0.3
        !           408:     ip route 10.0.0.1/32 eth0
        !           409:   
        !           410:     If there is no route to 10.0.0.2 and 10.0.0.3.  And interface eth0
        !           411:     is reachable, then the last route is installed into the kernel.
        !           412:   
        !           413:     zebra> show ip route
        !           414:     S>  10.0.0.1/32 [1/0] via 10.0.0.2 inactive
        !           415:                           via 10.0.0.3 inactive
        !           416:       *                   is directly connected, eth0
        !           417:   
        !           418:     '*' means this nexthop is installed into the kernel. 
        !           419: 
        !           420: *** Multipath (more than one nexthop for one prefix) can be installed into the kernel.
        !           421: 
        !           422:     When the kernel support multipath, zebra can install multipath
        !           423:   routes into the kernel.  Before doing that please make it sure that
        !           424:   setting --enable-multipath=ARG to configure script.  ARG must be digit
        !           425:   value.  When specify 0 to ARG, there is no limitation of the number
        !           426:   of the multipath.  Currently only GNU/Linux with netlink interface is
        !           427:   supported.
        !           428:   
        !           429:     ip route 10.0.0.1/32 10.0.0.2
        !           430:     ip route 10.0.0.1/32 10.0.0.3
        !           431:     ip route 10.0.0.1/32 eth0
        !           432:   
        !           433:     zebra> show ip route
        !           434:     S>* 10.0.0.1/32 [1/0] via 10.0.0.2
        !           435:       *                   via 10.0.0.3
        !           436:                           is directly connected, eth0
        !           437: 
        !           438: *** Kernel message delete installed route.
        !           439: 
        !           440:     After zebra install static or dynamic route into the kernel.
        !           441:   
        !           442:     R>* 0.0.0.0/0 [120/3] via 10.0.0.1
        !           443:   
        !           444:     If you delete this route outside zebra, old zebra does not reinstall
        !           445:   route again.  Now the route is re-processed and properly reinstall the
        !           446:   static or dynamic route into the kernel.
        !           447: 
        !           448: ** GNU/Linux netlink socket handling is improved to fix race condition
        !           449: between kernel message and user command responce.
        !           450: 
        !           451: * Changes in bgpd
        !           452: 
        !           453: ** Add show neighbor's routes command.
        !           454: 
        !           455:   "show ip bgp neighbors (A.B.C.D|X:X::X:X) routes"
        !           456:   "show ip bgp ipv4 (unicast|multicast) neighbors (A.B.C.D|X:X::X:X) routes"
        !           457:   "show ipv6 bgp neighbors (A.B.C.D|X:X::X:X) routes"
        !           458:   "show ipv6 mbgp neighbors (A.B.C.D|X:X::X:X) routes"
        !           459: 
        !           460: ** BGP passive peer support problem is fixed.
        !           461: 
        !           462: ** Redistributed IGP nexthop is passed to BGP nexthop.
        !           463: 
        !           464: ** On multiaccess media, if the nexthop is reachable nexthop is passed
        !           465: as it is.
        !           466: 
        !           467: ** Remove zebra-0.88 compatibility commands.
        !           468: 
        !           469:   "match ip prefix-list WORD"
        !           470:   "match ipv6 prefix-list WORD"
        !           471: 
        !           472:   Instead of above please use below commands.
        !           473: 
        !           474:   "match ip address prefix-list WORD"
        !           475:   "match ipv6 address prefix-list WORD"
        !           476: 
        !           477: ** Fix bug of holdtimer is not reset when bgp cleared.
        !           478: 
        !           479: ** "show ip bgp summary" display peer establish/drop count.
        !           480: 
        !           481: ** Change "match ip next-hop" argument from IP address to access-list
        !           482: name.
        !           483: 
        !           484: ** When "bgp enforce-first-as" is enabled, check EBGP peer's update
        !           485: has it's AS number in the first AS number in AS sequence.
        !           486: 
        !           487: ** New route-map command "set community-delete COMMUNITY-LIST" is
        !           488: added.  Community matched the CoMMUNITY-LIST is removed from the
        !           489: community.
        !           490: 
        !           491: ** BGP-MIB implementation is finished.
        !           492: 
        !           493: ** When BGP connection comes from unconfigured IP address, close
        !           494: socket immediately.
        !           495: 
        !           496: ** Do not compare router ID when the routes comes from EBGP peer.
        !           497: When originator ID is same, take shorter cluster-list route.  If
        !           498: cluster-list is same take smaller IP address neighbor's route.
        !           499: 
        !           500: ** Add "bgp bestpath as-path ignore" command.  When this option is
        !           501: set, do not concider AS path length when route selection.
        !           502: 
        !           503: ** Add "bgp bestpath compare-routerid".  When this option is set,
        !           504: compare router ID when the routes comes from EBGP peer.
        !           505: 
        !           506: ** Add "bgp deterministic-med" process.
        !           507: 
        !           508: ** BGP flap dampening feature is added.
        !           509: 
        !           510: ** When IBGP nexthop is changed, it is reflected to RIB.
        !           511: 
        !           512: ** Change "neighbor route-refresh" command to "neighbor capability
        !           513: route-refresh".
        !           514: 
        !           515: * Changes in ripd
        !           516: 
        !           517: ** Change "match ip next-hop" argument from IP address to access-list
        !           518: name.
        !           519: 
        !           520: ** "no ip rip (send|receive)" command accept version number argument.
        !           521: 
        !           522: ** Memory leak related classfull network generation is fixed.
        !           523: 
        !           524: ** When a route is in garbage collection process (invalid with metric
        !           525: 16) and a router receives the same route with valid metric then route
        !           526: was not installed into zebra rib, but only into ripd rib. Moreover ,
        !           527: it will never get into zebra rib, because ripd wrongly assumes it's
        !           528: already there.
        !           529: 
        !           530: * Change in ospfd
        !           531: 
        !           532: ** Fix bug of refreshing default route.
        !           533: 
        !           534: ** --enable-nssa turn on undergoing NSSA feature.
        !           535: 
        !           536: ** Fix bug of Hello packet's option is not properly set when interface
        !           537: comes up.
        !           538: 
        !           539: ** Reduce unconditional logging.
        !           540: 
        !           541: ** Add nexthop to OSPF path only when it is not there.
        !           542: 
        !           543: ** When there is no DR on network (suppose you have only one router
        !           544: with interface priority 0). It's router LSA does not contain the link
        !           545: information about this network.
        !           546: 
        !           547: ** When you change a priority of interface from/to 0
        !           548: ISM_NeighborChange event should be scheduled in order to elect new
        !           549: DR/BDR on the network.
        !           550: 
        !           551: ** When we add some LSA into retransmit list we need to check whether
        !           552: the present old LSA in retransmit list is not more recent than the new
        !           553: one.
        !           554: 
        !           555: ** In states Loading and Full the slave must resend its last Database
        !           556: Description packet in response to duplicate Database Description
        !           557: packets received from the master.  For this reason the slave must wait
        !           558: RouterDeadInterval seconds before freeing the last Database
        !           559: Description packet. Reception of a Database Description packet from
        !           560: the master after this interval will generate a SeqNumberMismatch
        !           561: neighbor event. RFC2328 Section 10.8
        !           562: 
        !           563: ** Virtual link can not configured in stub area.
        !           564: 
        !           565: ** Clear a ls_upd_queue queue of the interface when interface goes
        !           566: down.
        !           567: 
        !           568: ** "no router ospf" unregister redistribution requests from zebra.
        !           569: 
        !           570: ** New command for virtual-link configuration is added.
        !           571: 
        !           572:   "area A.B.C.D virtual-link A.B.C.D"
        !           573:   "area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535>"
        !           574:   "area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535> authentication-key AUTH_KEY"
        !           575:   "area A.B.C.D virtual-link A.B.C.D authentication-key AUTH_KEY"
        !           576:   "area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535> message-digest-key <1-255> md5 KEY"
        !           577:   "area A.B.C.D virtual-link A.B.C.D message-digest-key <1-255> md5 KEY"
        !           578: 
        !           579: ** Clear cryptographic sequence number when neighbor status is changed
        !           580: to NSM down.
        !           581: 
        !           582: ** Make Summary LSA's origination and refreshment as same as other
        !           583: type of LSA.
        !           584: 
        !           585: ** New OSPF pakcet read method. Now maximum packet length may be 65535
        !           586: bytes (maximum IP packet length).
        !           587: 
        !           588: ** Checking the age of the found LSA and if the LSA is MAXAGE we
        !           589: should call refresh instead of originate.
        !           590: 
        !           591: ** Install multipath information to zebra.
        !           592: 
        !           593: ** Fix socket descriptor leak when system call failed.
        !           594: 
        !           595: * Changes in ospf6d
        !           596: 
        !           597: ** Whole functionality has been rewritten as new code. new command
        !           598: "show ipv6 ospf6 spf node", "show ipv6 ospf6 spf tree", "show ipv6
        !           599: ospf6 spf table" has been added.
        !           600: 
        !           601: ** Change to do not send garbage route whose nexthop is not linklocal
        !           602: address.
        !           603: 
        !           604: ** "redistribute ospf6" was generated in "router ospf6" in config
        !           605: file. It is fixed.
        !           606: 
        !           607: ** LSDB sync bug is fixed.
        !           608: 
        !           609: ** Fix bug of using unavailable route.
        !           610: 
        !           611: * Changes in vtysh
        !           612: 
        !           613: ** route-map and access-list configuration is merged into one
        !           614: configuration.
        !           615: 
        !           616: ** /usr/local/etc/Zebra.conf is integrated configuration file.  "write
        !           617: memory" in vtysh will write whole configuration to this file.
        !           618: 
        !           619: ** When -b option is specified to vtysh, vtysh read
        !           620: /usr/local/etc/Zebra.conf file then pass the confuguration to proper
        !           621: protocol daemon.  So make all protocol daemon's configuration file
        !           622: empty then invoke all daemon.  After that vtysh -b will setup saved
        !           623: configuration.
        !           624: 
        !           625: zebrastart.sh
        !           626: =============
        !           627: /usr/local/sbin/zebra -d
        !           628: /usr/local/sbin/ripd -d
        !           629: /usr/local/sbin/ospfd -d
        !           630: /usr/local/sbin/bgpd -d
        !           631: /usr/local/bin/vtysh -b
        !           632: 
        !           633: * Changes in zebra-0.89
        !           634: 
        !           635: * Changes in lib
        !           636: 
        !           637: ** distribute-list can set all interface's access-list and prefix-list
        !           638: configuration.
        !           639: 
        !           640: * Changes in ripd
        !           641: 
        !           642: ** "show ip protocols" display proper distribute-list settings and
        !           643: distance settings.
        !           644: 
        !           645: ** When metric infinity route received withdraw the route from kernel
        !           646: immediately it used to be wait garbage collection.
        !           647: 
        !           648: ** key-chain can be used for simple password authentication.
        !           649: 
        !           650: ** RIPv2 MIB getnext interface bug is fixed.
        !           651: 
        !           652: * Changes in vtysh
        !           653: 
        !           654: ** --with-libpam enable PAM authentication for vtysh.
        !           655: 
        !           656: ** Now vtysh read vtysh.conf.  This file should be
        !           657: ${SYSCONFDIR}/etc/vtysh.conf for security reason.  Usually it is
        !           658: /usr/local/etc/vtysh.conf.
        !           659: 
        !           660: ** "username WORD nopassword" command is added to vtysh.
        !           661: 
        !           662: * Chagees in ospfd
        !           663: 
        !           664: ** NBMA interface support is added.
        !           665: 
        !           666: ** OSPF area is sorted by area ID.
        !           667: 
        !           668: ** New implementation of OSPF refreesh.
        !           669: 
        !           670: ** OSPF-MIB read function is partly added.
        !           671: 
        !           672: * Changes in bgpd
        !           673: 
        !           674: ** When the peering is done by ebgp-multihop, nexthop is looked up
        !           675: like IBGP routes.
        !           676: 
        !           677: ** "show ip mbgp" commands are changed to "show ip bgp ipv4
        !           678: multicast".
        !           679: 
        !           680: ** New terminal commands are added.
        !           681:   "show ip bgp ipv4 (unicast|multicast) filter-list WORD"
        !           682:   "show ip bgp ipv4 (unicast|multicast) community"
        !           683:   "show ip bgp ipv4 (unicast|multicast) community-list WORD"
        !           684:   "show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"
        !           685: 
        !           686: ** MBGP soft-reconfiguration command is added.
        !           687:   "clear ip bgp x.x.x.x ipv4 (unicast|multicast) in"
        !           688:   "clear ip bgp x.x.x.x ipv4 (unicast|multicast) out"
        !           689:   "clear ip bgp x.x.x.x ipv4 (unicast|multicast) soft"
        !           690:   "clear ip bgp <1-65535> ipv4 (unicast|multicast) in"
        !           691:   "clear ip bgp <1-65535> ipv4 (unicast|multicast) out"
        !           692:   "clear ip bgp <1-65535> ipv4 (unicast|multicast) soft"
        !           693:   "clear ip bgp * ipv4 (unicast|multicast) in"
        !           694:   "clear ip bgp * ipv4 (unicast|multicast) out"
        !           695:   "clear ip bgp * ipv4 (unicast|multicast) soft"
        !           696: 
        !           697: ** MED related commands are added.
        !           698:   "bgp deterministic-med"
        !           699:   "bgp bestpath med confed"
        !           700:   "bgp bestpath med missing-as-worst"
        !           701: 
        !           702: ** "bgp default local-preference" command is added.
        !           703: 
        !           704: ** BGP confederation peer's routes are passed to zebra like IBGP route.
        !           705: 
        !           706: ** Community match command is added.
        !           707:   "show ip bgp community <val>"
        !           708:   "show ip bgp community <val> exact-match"
        !           709: 
        !           710: ** EBGP multihop route treatment bug is fixed.  Now nexthop is
        !           711: resolved by IGP routes.
        !           712: 
        !           713: ** Some commands are added to show routes by filter-list and community
        !           714: value.
        !           715:   "show ip bgp ipv4 (unicast|multicast) filter-list WORD"
        !           716:   "show ip bgp ipv4 (unicast|multicast) community"
        !           717:   "show ip bgp ipv4 (unicast|multicast) community-list WORD"
        !           718:   "show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"
        !           719: 
        !           720: * Changes in zebra
        !           721: 
        !           722: ** zebra read interface's address information using getifaddrs() when
        !           723: it is available.
        !           724: 
        !           725: ** Reflect IPv6 interface's address change to protocol daemons.
        !           726: 
        !           727: * Changes in zebra-0.88
        !           728: 
        !           729: * Changes in lib
        !           730: 
        !           731: ** "exact-match" option is added to "access-list" and "ipv6
        !           732: access-list" command.  If this option is specified, the prefix and
        !           733: prefix length is compared as exact match mode.
        !           734: 
        !           735: * Changes in zebra
        !           736: 
        !           737: ** New Zebra message ZEBRA_REDISTRIBUTE_DEFAULT_ADD and
        !           738: ZEBRA_REDISTRIBUTE_DEFAULT_DELTE are added.
        !           739: 
        !           740: ** Default administrative distance value is changed.
        !           741: 
        !           742:             Old         New
        !           743: ------------------------------------------
        !           744: system      10           0
        !           745: kernel      20           0
        !           746: connected   30           0
        !           747: static      40           1
        !           748: rip         50         120
        !           749: ripng       50         120
        !           750: ospf        60         110
        !           751: ospf6       49         110
        !           752: bgp         70         200(iBGP)  20(eBGP)
        !           753: ------------------------------------------
        !           754: 
        !           755: ** Distance value can be passed from protocol daemon to zebra.
        !           756: 
        !           757: ** "show ip route" shows [metric/distance] value pair.
        !           758: 
        !           759: ** Zebra Protocol is changed to support multi-path route and distance
        !           760: value.
        !           761: 
        !           762: * Changes in ospfd
        !           763: 
        !           764: ** "default-information originate [always]" command is added.
        !           765: 
        !           766: ** "default-metric <0-16777214>" command is added.
        !           767: 
        !           768: ** "show ip ospf database" command is integrated.  LS-ID and AdvRouter can
        !           769:    be specifed.  The commands are
        !           770: 
        !           771:    show ip ospf database TYPE LS-ID
        !           772:    show ip ospf database TYPE LS-ID ADV-ROUTER
        !           773:    show ip ospf database TYPE LS-ID self-originate
        !           774:    show ip ospf database TYPE self-originate
        !           775: 
        !           776: ** route-map support for `redistribute' command are added.
        !           777:    Supported `match' statements are
        !           778: 
        !           779:    match interface
        !           780:    match ip address
        !           781:    match next-hop
        !           782: 
        !           783:    Supported `set' statements are
        !           784: 
        !           785:    set metric
        !           786:    set metric-type
        !           787: 
        !           788: ** Pass OSPF metric value to zebra daemon.
        !           789: 
        !           790: * Changes in ripd
        !           791: 
        !           792: ** When specified route-map does not exist, it means all deny.
        !           793: 
        !           794: ** "default-metric <1-16>" command is added.
        !           795: 
        !           796: ** "offset-list ACCESS-LIST-NAME <0-16>" and "offset-list
        !           797: ACCESS-LIST-NAME <0-16> IFNAME" commands are added.
        !           798: 
        !           799: ** "redistribute ROUTE-TYPE metric <0-16>" command is added.
        !           800: 
        !           801: ** "default-information originate" command is added.
        !           802: 
        !           803: ** "ip split-horizon" and "no ip split-horizon" is added to interface
        !           804: configuration.
        !           805: 
        !           806: ** "no router rip" command is added.
        !           807: 
        !           808: ** "ip rip authentication mode (md5|text)" is added to interface
        !           809: configuration.
        !           810: 
        !           811: ** "ip rip authentication key-chain KEY-CHAIN" is added to interface
        !           812: configuration.
        !           813: 
        !           814: ** Pass RIP metric value to zebra daemon.
        !           815: 
        !           816: ** Distance manipulation functions are added.
        !           817: 
        !           818: * Changes in bgpd
        !           819: 
        !           820: ** Fix bug of next hop treatment for MPLS-VPN route exchange.
        !           821: 
        !           822: ** BGP peer MIB is updated.
        !           823: 
        !           824: ** Aggregated route has origin IGP, atomic-aggregate and proper
        !           825: aggregator attribute.
        !           826: 
        !           827: ** Suppressed route now installed into BGP table.  It is only
        !           828: suppressed from announcement.
        !           829: 
        !           830: ** BGP router-id is properly set after "no router bgp ASN" and "router
        !           831: bgp ASN".
        !           832: 
        !           833: ** Add check for nexthop is accessible or not for IBGP routes.
        !           834: 
        !           835: ** Add cehck for nexthop is on connected or not for EBGP routes.
        !           836: 
        !           837: ** "dump bgp route" command is changed to "dump bgp route-mrt" for
        !           838: generating MRT compatible dump output.
        !           839: 
        !           840: ** Soft reconfiguration inbound and outbound is supported.
        !           841: 
        !           842: ** Route refresh feature is supported.
        !           843: 
        !           844: * Changes in vtysh
        !           845: 
        !           846: ** VTY shell is now included into the distribution.
        !           847: 
        !           848: * Changes in zebra-0.87
        !           849: 
        !           850: * Changes in lib
        !           851: 
        !           852: ** "show startup-config" command is added.
        !           853: 
        !           854: ** "show history" command is added.
        !           855: 
        !           856: ** Memory statistics command is changed.  New command
        !           857: 
        !           858:    show memory all
        !           859:    show memory lib
        !           860:    show memory rip
        !           861:    show memory ospf
        !           862:    show memory bgp
        !           863: 
        !           864: are added.
        !           865: 
        !           866: ** Filters can be removed only specify it's name.  New command
        !           867: 
        !           868:    no access-list NAME
        !           869:    no ip community-list NAME
        !           870:    no ip as-path access-list NAME
        !           871:    no route-map NAME
        !           872: 
        !           873: are added.
        !           874: 
        !           875: ** At any node, user can view/save user configuration.
        !           876: 
        !           877:    write terminal
        !           878:    write file
        !           879:    wirte memory
        !           880: 
        !           881: are added to every node in default.
        !           882: 
        !           883: ** LCD completion is added.  For example both "ip" and "ipv6" command
        !           884: are exist, "i" then press TAB will be expanded to "ip".
        !           885: 
        !           886: * Changes in bgpd
        !           887: 
        !           888: ** "show ip bgp" family shows total number of prefixes.
        !           889: 
        !           890: ** "no bgp default ipv4-unicast" command is added.
        !           891: 
        !           892: ** Extended Communities support is added.
        !           893: 
        !           894: ** "no neighbor PEER send-community extended" command is added.
        !           895: 
        !           896: ** MPLS-VPN PE-RR support is added.
        !           897: 
        !           898:  New address family vpnv4 unicast is introduced.
        !           899: 
        !           900:   !
        !           901:   address-family vpnv4 unicast
        !           902:    neighobr PEER activate
        !           903:    network A.B.C.D rd RD tag TAG
        !           904:   exit-address-family
        !           905:   !
        !           906: 
        !           907:  To make it route-reflector, please configure it under normal router
        !           908: bgp ASN.
        !           909: 
        !           910:   !
        !           911:   router bgp 7675
        !           912:    no bgp default ipv4-unicast
        !           913:    bgp router-id 10.0.0.100
        !           914:    bgp cluster-id 10.0.0.100
        !           915:    neighbor 10.0.0.1 remote-as 65535
        !           916:    neighbor 10.0.0.1 route-reflector-client
        !           917:    neighbor 10.0.0.2 remote-as 65535
        !           918:    neighbor 10.0.0.2 route-reflector-client
        !           919:    neighbor 10.0.0.3 remote-as 65535
        !           920:    neighbor 10.0.0.3 route-reflector-client
        !           921:   !
        !           922:   address-family vpnv4 unicast
        !           923:    neighbor 10.0.0.1 activate
        !           924:    neighbor 10.0.0.2 activate
        !           925:    neighbor 10.0.0.3 activate
        !           926:   exit-address-family
        !           927:   !
        !           928: 
        !           929: * Changes in ospfd
        !           930: 
        !           931: ** Many many bugs are fixed.
        !           932: 
        !           933: * Changes in ripd
        !           934: 
        !           935: ** Better interface up/down event handle.
        !           936: 
        !           937: * Changes in zebra
        !           938: 
        !           939: ** Better interface up/down event handle.
        !           940: 
        !           941: * Changes in zebra-0.86
        !           942: 
        !           943: * Changes in lib
        !           944: 
        !           945: ** Fix bug of exec-timeout command which may cause crush.
        !           946: 
        !           947: ** Multiple same policy for "access-list", "ip prefix-list, "as-path
        !           948: access-list", "ip community-list" is not duplicated.
        !           949: 
        !           950: ** It used to be "ip prefix-list A.B.C.D/M" match routes which mask >=
        !           951: M.  Now default behavior is exact match so it only match routes which
        !           952: mask == M.
        !           953: 
        !           954: * Changes in bgpd
        !           955: 
        !           956: ** "match ip address prefix-list" is added to route-map.
        !           957: 
        !           958: ** A route without local preference is evaluated as 100 local preference.
        !           959: 
        !           960: ** Select smaller router-id route when other values are same.
        !           961: 
        !           962: ** Compare MED only both routes comes from same neighboring AS.
        !           963: 
        !           964: ** "bgp always-compare-med" command is added.
        !           965: 
        !           966: ** Now MED value is passed to IBGP peer.
        !           967: 
        !           968: ** When neighbor's filter is configured with non-existent access-list,
        !           969: as-path access-list, ip prefix-list, route-map.  The behavior is
        !           970: changed from all permit to all deny.
        !           971: 
        !           972: * Changes in ospfd
        !           973: 
        !           974: ** Fix bug of external route tag byte order.
        !           975: 
        !           976: ** OSPF Neighbor deletion bug which cause crush is fixed.
        !           977: 
        !           978: ** Some route calculation bug are fixed.
        !           979: 
        !           980: ** Add sanity check with router        routing table.
        !           981: 
        !           982: ** Fix bug of memory leak about linklist.
        !           983: 
        !           984: ** Fix bug of 1-WayReceived in NSM.
        !           985: 
        !           986: ** Take care of BIGENDIAN architecture.
        !           987: 
        !           988: ** Fix bug of NSM state flapping between ExStart and Exchange.
        !           989: 
        !           990: ** Fix bug of Network-LSA originated in stub network.
        !           991: 
        !           992: ** Fix bug of MS flag unset.
        !           993: 
        !           994: ** Add to schedule router_lsa origination when the interface cost
        !           995: changes.
        !           996: 
        !           997: ** Increment LS age by configured interface transmit_delay.
        !           998: 
        !           999: ** distribute-list is reimplemented.
        !          1000: 
        !          1001: ** Fix bug of refresh never occurs.
        !          1002: 
        !          1003: ** Fix bug of summary-LSAs reorigination.  Correctly copy
        !          1004: OSPF_LSA_APPROVED flag to new LSA. when summary-LSA is reoriginatd.
        !          1005: 
        !          1006: ** Fix bug of re-origination when a neighbor disappears.
        !          1007: 
        !          1008: ** Fix bug of segmentation fault with DD retransmission.
        !          1009: 
        !          1010: ** Fix network-LSA re-origination problem.
        !          1011: 
        !          1012: ** Fix problem of remaining withdrawn routes on zebra.
        !          1013: 
        !          1014: * Changes in ripd
        !          1015: 
        !          1016: ** Do not leave from multicast group when interface goes down bug is
        !          1017: fixed.
        !          1018: 
        !          1019: * Changes in zebra
        !          1020: 
        !          1021: ** Remove client structure when client dies.
        !          1022: 
        !          1023: ** Take care static route when interface goes up/down.
        !          1024: 
        !          1025: * Changes in zebra-0.85
        !          1026: 
        !          1027: * Changes in bgpd
        !          1028: 
        !          1029: ** "transparent-nexthop" and "transparenet-as" commands are added.
        !          1030: 
        !          1031: ** Route reflector's originator-id bug is fixed.
        !          1032: 
        !          1033: * Changes in ospfd
        !          1034: 
        !          1035: ** Fix bug of OSPF LSA memory leak.
        !          1036: 
        !          1037: ** Fix bug of OSPF external route memory leak.
        !          1038: 
        !          1039: ** AS-external-LSA origination bug was fixed.
        !          1040: 
        !          1041: ** LS request treatment is completely rewritten.  Now performance is
        !          1042: drastically improved.
        !          1043: 
        !          1044: * Changes in ripd
        !          1045: 
        !          1046: ** RIPv1 update is done by class-full manner.
        !          1047: 
        !          1048: * Changes in zebra-0.84b
        !          1049: 
        !          1050: * Changes in lib
        !          1051: 
        !          1052: ** Fix bug of inet_pton return value handling
        !          1053: 
        !          1054: * Changes in bgpd
        !          1055: 
        !          1056: ** Fix bug of BGP-4+ link-local address nexthop check for IBGP peer.
        !          1057: 
        !          1058: ** Don't allocate whole buffer for displaying "show ip bgp".  Now it
        !          1059: consume only one screen size memory.
        !          1060: 
        !          1061: * Changes in ripd
        !          1062: 
        !          1063: ** Fix debug output string.
        !          1064: 
        !          1065: ** Add RIP peer handling.  RIP peer are shown by "show ip protocols".
        !          1066: 
        !          1067: * Changes in zebra-0.84a
        !          1068: 
        !          1069: * Changes in bgpd
        !          1070: 
        !          1071: ** Fix serious bug of BGP-4+ peering under IPv6 link-local address.
        !          1072:    Due to the bug BGP-4+ peering may not be established.
        !          1073: 
        !          1074: * Changes in zebra-0.84
        !          1075: 
        !          1076: * Changes in lib
        !          1077: 
        !          1078: ** IPv6 address and prefix parser is added to VTY by Toshiaki Takada
        !          1079:    <takada@zebra.org>.  DEFUN string is "X:X::X:X" for IPv6 address,
        !          1080:    "X:X::X:X/M" for IPv6 prefix.  You can use it like this.
        !          1081: 
        !          1082:    DEFUN (func, cmd, "neighbor (A.B.C.D|X:X::X:X) remote-as <1-65535>")
        !          1083: 
        !          1084: ** VTY configuration is locked during configuration.  This is for
        !          1085:    avoiding unconditional crush from two terminals modify the
        !          1086:    configuration at the same time.  "who" command shows which termnal
        !          1087:    lock the configuration.  VTY which has '*' character at the head of
        !          1088:    line is locking the configuration.
        !          1089: 
        !          1090: ** Old logging functions are removed.  Functions like
        !          1091:    log_open,log_close,openlog are deleted.  Instead of that please use
        !          1092:    zlog_* functions.  zvlog_* used in ospf6d are deleted also.
        !          1093: 
        !          1094: ** "terminal monitor" command is added.  "no terminal monitor" is for
        !          1095:    disabling.  This command simply display logging information to the
        !          1096:    VTY.
        !          1097: 
        !          1098: ** dropline.[ch] files are deleted.
        !          1099: 
        !          1100: * Changes in bgpd
        !          1101: 
        !          1102: ** BGP neighbor configuration are sorted by it's IP address.
        !          1103: 
        !          1104: ** BGP peer configuration and actual peer is separated.  This is
        !          1105:    preparation for Route Server support.
        !          1106: 
        !          1107: ** "no neighbor PEER" command is added. You can delete neighbor
        !          1108:    without specifying AS number.
        !          1109: 
        !          1110: ** "no neighbor ebgp-multihop" command is added.
        !          1111: 
        !          1112: ** "no neighbor port PORT" command is added.
        !          1113: 
        !          1114: ** To conform RFC1771, "neighbor PEER send-community" is default
        !          1115:    behavior.  If you want to disable sending community attribute,
        !          1116:    please specify "no neighbor PEER send-community" to the peer.
        !          1117: 
        !          1118: ** "neighbor maximum-prefix NUMBER" command is added.
        !          1119: 
        !          1120: ** Multi-protocol extention NLRI is proceeded only when the peer is
        !          1121:    configured proper Address Family and Subsequent Address Family.  If
        !          1122:    not, those NLRI are simply ignored.
        !          1123: 
        !          1124: ** Aggregate-address support is improved.  Currently below commands
        !          1125:    works.
        !          1126: 
        !          1127:   "aggregate-address"
        !          1128:   "aggregate-address summary-only"
        !          1129:   "no aggregate-address"
        !          1130:   "no aggregate-address summary-only"
        !          1131: 
        !          1132:   "ipv6 bgp aggregate-address"
        !          1133:   "ipv6 bgp aggregate-address summary-only"
        !          1134:   "no ipv6 bgp aggregate-address"
        !          1135:   "no ipv6 bgp aggregate-address summary-only"
        !          1136: 
        !          1137: ** redistribute route-map bug is fixed.
        !          1138: 
        !          1139: ** MBGP support becomes default.  "configure" option --enable-mbgp is
        !          1140:    removed.
        !          1141: 
        !          1142: ** New command "neighbor PEER timers connect <1-65535>" is added.
        !          1143: 
        !          1144: ** New command "neighbor PEER override-capability" is added.
        !          1145: 
        !          1146: ** New command "show ip bgp neighbor A.B.C.D advertised-route" is added.
        !          1147: 
        !          1148: ** New command "show ip bgp neighbor A.B.C.D routes" is added.  To use
        !          1149:    this command, you have to configure neighbor with
        !          1150:    "neighbor A.B.C.D soft-reconfiguration inbound" beforehand.
        !          1151:    
        !          1152: 
        !          1153: * Changes in zebra-0.83
        !          1154: 
        !          1155: * bgpd
        !          1156: 
        !          1157: ** Serious bug fix about fetching global and link-local address at the
        !          1158: same time.  Due to this bug, corrupted IPv6 prefix is generated.  If
        !          1159: you uses bgpd for BGP-4+ please update to this version.  The bug is
        !          1160: introduced in zebra-0.82.
        !          1161: 
        !          1162: ** When bgpd send Notify message, don't use thread manager.  It is now
        !          1163: send to neighbor immediately.
        !          1164: 
        !          1165: * Changes in zebra-0.82
        !          1166: 
        !          1167: ** Solaris 2.6 support is added by Michael Handler
        !          1168: <handler@sub-rosa.com>.
        !          1169: 
        !          1170: ** MBGP support is added by Robert Olsson <Robert.Olsson@data.slu.se>.
        !          1171: Please specify --enable-mbgp to configure script.  This option will be
        !          1172: removed in the future and MBGP support will be default.
        !          1173: 
        !          1174: * Changes in zebra
        !          1175: 
        !          1176: ** When interface goes down, withdraw connected routes from routing
        !          1177: table.  When interface goes up, restore the routes to the routing
        !          1178: table.
        !          1179: 
        !          1180: ** `show interface' show interface's statistics on Linux and BSD with
        !          1181: routing socket.
        !          1182: 
        !          1183: ** Now zebra can get MTU value on BSDI/OS.
        !          1184: 
        !          1185: * Changes in bgpd
        !          1186: 
        !          1187: ** Add capability option support based upon
        !          1188: draft-ietf-idr-bgp4-cap-neg-04.txt.
        !          1189: 
        !          1190: ** Add `show ipv6 bgp prefix-list' command.
        !          1191: 
        !          1192: ** Check self AS appeared in received routes.
        !          1193: 
        !          1194: ** redistribute route-map support is added.
        !          1195: 
        !          1196: ** BGP packet dump feature compatible with MRT.
        !          1197: 
        !          1198: * Changes in ripd
        !          1199: 
        !          1200: ** Fix bug of `timers basic' command's argument format.
        !          1201: 
        !          1202: * Changes in ripngd
        !          1203: 
        !          1204: ** Calculate max RTE using interface's MTU value.
        !          1205: 
        !          1206: * Changes in ospfd
        !          1207: 
        !          1208: ** Some correction to LSU processing.
        !          1209: 
        !          1210: ** Add check for lsa->refresh_list.
        !          1211: 
        !          1212: * Changes in ospf6d
        !          1213: 
        !          1214: ** Many debug feature is added.
        !          1215: 
        !          1216: * Changes in zebra-0.81
        !          1217: 
        !          1218: ** SNMP support is disabled in default.--enable-snmp option is added
        !          1219: to configure script.
        !          1220: 
        !          1221: * Changes in bgpd
        !          1222: 
        !          1223: ** Fix FSM bug which introduced in zebra-0.80.
        !          1224: 
        !          1225: * Changes in zebra-0.80
        !          1226: 
        !          1227: * access-list
        !          1228: 
        !          1229:   New access-list name space `ipv6 access-list' is added.  At the same
        !          1230:   time, `access-list' statemant only accepts IPv4 prefix.  Please be
        !          1231:   careful if you use IPv6 filtering.  You will need to change your
        !          1232:   configuration.  For IPv6 filtering please use `ipv6 access-list'.
        !          1233:   
        !          1234:   As of zebra-0.7x, user can use `access-list' for both IPv4 and IPv6
        !          1235:   filtering.
        !          1236:   
        !          1237:   ! zebra-0.7x
        !          1238:   access-list DML-net permit 203.181.89.0/24
        !          1239:   access-list DML-net permit 3ffe:506::0/32
        !          1240:   access-list DML-net deny any
        !          1241:   !
        !          1242:   
        !          1243:   Above configuration is not valid for zebra-08x.  Please add `ipv6'
        !          1244:   before 'access-list' when you configure IPv6 filtering.
        !          1245:   
        !          1246:   ! zebra-0.8x
        !          1247:   access-list DML-net permit 203.181.89.0/24
        !          1248:   access-list DML-net deny any
        !          1249:   !
        !          1250:   ipv6 access-list DML-net permit 3ffe:506::0/32
        !          1251:   ipv6 access-list DML-net deny any
        !          1252:   !
        !          1253: 
        !          1254: * prefix-list
        !          1255: 
        !          1256:   And also new prefix-list name space `ipv6 prefix-list' is added.  It
        !          1257:   is the same as the change of `access-list'. `ip prefix-list' now only
        !          1258:   accept IPv4 prefix.  It was source of confusion that `ip prefix-list'
        !          1259:   can be used both IPv4 and IPv6 filtering.  Now name space is separated
        !          1260:   to clear the meaning of the filter.
        !          1261:   
        !          1262:   If you use `ip prefix-list' for IPv6 filtering, please change the
        !          1263:   stetement.
        !          1264:   
        !          1265:   ! zebra-0.7x
        !          1266:   ip prefix-list 6bone-filter seq 5 permit 3ffe::/17 le 24 ge 24
        !          1267:   ip prefix-list 6bone-filter seq 10 permit 3ffe:8000::/17 le 28 ge 28
        !          1268:   ip prefix-list 6bone-filter seq 12 deny 3ffe::/16
        !          1269:   ip prefix-list 6bone-filter seq 15 permit 2000::/3 le 16 ge 16
        !          1270:   ip prefix-list 6bone-filter seq 20 permit 2001::/16 le 35 ge 35
        !          1271:   ip prefix-list 6bone-filter seq 30 deny any
        !          1272:   !
        !          1273:   
        !          1274:   Now user can explicitly configure it as IPv6 prefix-list.
        !          1275:   
        !          1276:   ! zebra-0.8x
        !          1277:   ipv6 prefix-list 6bone-filter seq 5 permit 3ffe::/17 le 24 ge 24
        !          1278:   ipv6 prefix-list 6bone-filter seq 10 permit 3ffe:8000::/17 le 28 ge 28
        !          1279:   ipv6 prefix-list 6bone-filter seq 12 deny 3ffe::/16
        !          1280:   ipv6 prefix-list 6bone-filter seq 15 permit 2000::/3 le 16 ge 16
        !          1281:   ipv6 prefix-list 6bone-filter seq 20 permit 2001::/16 le 35 ge 35
        !          1282:   ipv6 prefix-list 6bone-filter seq 30 deny any
        !          1283:   !
        !          1284: 
        !          1285: * RIP configuration
        !          1286: 
        !          1287:   If you want to filter only default route (0.0.0.0/0) and permit other
        !          1288:   routes, it was hard to do that.  Now `ip prefix-list' can be used for
        !          1289:   RIP route filtering.
        !          1290:   
        !          1291:   New statement:
        !          1292:   
        !          1293:   `distribute-list prefix PLIST_NAME (in|out) IFNAME'
        !          1294:   
        !          1295:   is added to ripd.  So you can configure on eth0 interface accept all
        !          1296:   routes other than default routes.
        !          1297:   
        !          1298:   !
        !          1299:   router rip
        !          1300:    distribute-list prefix filter-default in eth0
        !          1301:   !
        !          1302:   ip prefix-list filter-default deny 0.0.0.0/0 le 0
        !          1303:   ip prefix-list filter-default permit any
        !          1304:   !
        !          1305: 
        !          1306: * RIPng configuration
        !          1307: 
        !          1308:   Same change is done for ripngd.  You can use `ipv6 prefix-list' for
        !          1309:   filtering.
        !          1310:   
        !          1311:   !
        !          1312:   router ripng
        !          1313:    distribute-list prefix filter-default in eth0
        !          1314:   !
        !          1315:   ipv6 prefix-list filter-default deny ::/0 le 0
        !          1316:   ipv6 prefix-list filter-default permit any
        !          1317:   !
        !          1318: 
        !          1319: * BGP configuration
        !          1320: 
        !          1321:   So far, Multiprotocol Extensions for BGP-4 (RFC2283) configuration is
        !          1322:   done with traditional IPv4 peering statement like blow.
        !          1323:   
        !          1324:   !
        !          1325:   router bgp 7675
        !          1326:    neighbor 3ffe:506::1 remote-as 2500
        !          1327:    neighbor 3ffe:506::1 prefix-list 6bone-filter out
        !          1328:   !
        !          1329:   
        !          1330:   For separating configuration IPv4 and IPv6, and for retaining Cisco
        !          1331:   configuration compatibility, now IPv6 configuration is done by IPv6
        !          1332:   specific statement.  IPv6 BGP configuration is done by statement which
        !          1333:   start from `ipv6 bgp'.
        !          1334:   
        !          1335:   !
        !          1336:   router bgp 7675
        !          1337:   !
        !          1338:   ipv6 bgp neighbor 3ffe:506::1 remote-as 2500
        !          1339:   ipv6 bgp neighbor 3ffe:506::1 prefix-list 6bone-filter out
        !          1340:   !
        !          1341:   
        !          1342:   At the same time some IPv6 specific commands are deleted from IPv4
        !          1343:   configuration.
        !          1344:   
        !          1345:   o redistribute ripng
        !          1346:   o redistribute ospf6
        !          1347:   o neighbor PEER version BGP_VERSION
        !          1348:   o neighbor PEER interface IFNAME
        !          1349:   
        !          1350:   Those commands are only accepted as like below.
        !          1351:   
        !          1352:   o ipv6 bgp redistribute ripng
        !          1353:   o ipv6 bgp redistribute ospf6
        !          1354:   o ipv6 bgp neighbor PEER version BGP_VERSION
        !          1355:   o ipv6 bgp neighbor PEER interface IFNAME
        !          1356:   
        !          1357:   And below new commands are added.
        !          1358:   
        !          1359:   o ipv6 bgp network IPV6_PREFIX
        !          1360:   o ipv6 bgp redistribute static
        !          1361:   o ipv6 bgp redistribute connected
        !          1362:   o ipv6 bgp neighbor PEER remote-as <1-65535> [passive]
        !          1363:   o ipv6 bgp neighbor PEER ebgp-multihop [TTL]
        !          1364:   o ipv6 bgp neighbor PEER description DESCRIPTION
        !          1365:   o ipv6 bgp neighbor PEER shutdown
        !          1366:   o ipv6 bgp neighbor PEER route-reflector-client
        !          1367:   o ipv6 bgp neighbor PEER update-source IFNAME
        !          1368:   o ipv6 bgp neighbor PEER next-hop-self
        !          1369:   o ipv6 bgp neighbor PEER timers holdtime <0-65535>
        !          1370:   o ipv6 bgp neighbor PEER timers keepalive <0-65535>
        !          1371:   o ipv6 bgp neighbor PEER send-community
        !          1372:   o ipv6 bgp neighbor PEER weight <0-65535>
        !          1373:   o ipv6 bgp neighbor PEER default-originate
        !          1374:   o ipv6 bgp neighbor PEER filter-list FILTER_LIST_NAME (in|out)
        !          1375:   o ipv6 bgp neighbor PEER prefix-list PREFIX_LIST_NAME (in|out)
        !          1376:   o ipv6 bgp neighbor PEER distribute-list AS_LIST_NAME (in|out)
        !          1377:   o ipv6 bgp neighbor PEER route-map ROUTE_MAP_NAME (in|out)
        !          1378:   
        !          1379:   And some utility commands are introduced.
        !          1380:   
        !          1381:   o clear ipv6 bgp [PEER]
        !          1382:   o show ipv6 bgp neighbors [PEER]
        !          1383:   o show ipv6 bgp summary
        !          1384:   
        !          1385:   I hope these changes are easy to understand for current Zebra users...
        !          1386: 
        !          1387: * To restrict connection to VTY interface.
        !          1388: 
        !          1389:   It used to be both IPv4 and IPv6 filter can be specified with one
        !          1390:   access-list.  Then the access-list can be appried to VTY interface
        !          1391:   with `access-class' stetement in `line vty' node.  Below is example in
        !          1392:   zebra-0.7x.
        !          1393:   
        !          1394:   !
        !          1395:   access-list local-only permit 127.0.0.1/32
        !          1396:   access-list local-only permit ::1/128
        !          1397:   access-list local-only deny any
        !          1398:   !
        !          1399:   line vty
        !          1400:    access-class local-only
        !          1401:   !
        !          1402:   
        !          1403:   Now IPv4 and IPv6 filter have each name space.  It is not possible to
        !          1404:   specify IPv4 and IPv6 filter with one access-list.  For setting IPv6
        !          1405:   access-list in `line vty', `ipv6 access-class' statement is
        !          1406:   introduced.  Let me show the configuration in zebra-0.8x.
        !          1407:   
        !          1408:   !
        !          1409:   access-list local-only permit 127.0.0.1/32
        !          1410:   access-list local-only deny any
        !          1411:   !
        !          1412:   ipv6 access-list local-only permit ::1/128
        !          1413:   ipv6 access-list local-only dny any
        !          1414:   !
        !          1415:   line vty
        !          1416:    access-class local-only
        !          1417:    ipv6 access-class local-only
        !          1418:   !
        !          1419: 
        !          1420: * route-map
        !          1421: 
        !          1422:   New IPv6 related route-map match commands are added.
        !          1423:   
        !          1424:   o match ipv6 address
        !          1425:   o match ipv6 next-hop
        !          1426:   
        !          1427:   Please change your configuration if you use IP match statement for
        !          1428:   IPv6 route.
        !          1429:   
        !          1430:   zebra-0.7x config
        !          1431:   =================
        !          1432:   !
        !          1433:   access-list all permit any
        !          1434:   !
        !          1435:   route-map set-nexthop permit 10
        !          1436:    match ip address all
        !          1437:    set ipv6 next-hop global 3ffe:506::1
        !          1438:    set ipv6 next-hop local fe80::cbb5:591a
        !          1439:   !
        !          1440:   
        !          1441:   zebra-0.8x config
        !          1442:   =================
        !          1443:   !
        !          1444:   ipv6 access-list all permit any
        !          1445:   !
        !          1446:   route-map set-nexthop permit 10
        !          1447:    match ipv6 address all
        !          1448:    set ipv6 next-hop global 3ffe:506::1
        !          1449:    set ipv6 next-hop local fe80::cbb5:591a
        !          1450:   !
        !          1451: 
        !          1452: * zebra connection
        !          1453: 
        !          1454:   Protocol daemon such as ripd, bgpd, ospfd will reconnect zebra daemon
        !          1455:   when the connection fail.  Those daemons try to connect zebra every 10
        !          1456:   seconds first three trial, then the interval changed to 60 seconds.
        !          1457:   After all, if ten connections are fail, protocol daemon give up the
        !          1458:   connection to the zebra daemon.
        !          1459: 
        !          1460: * SNMP support (is not yet finished)
        !          1461: 
        !          1462:   Zebra uses SMUX protocol (RFC1227) for making communication with SNMP
        !          1463:   agent.  Currently lib/smux.c can be compiled only with ucd-snmp-4.0.1
        !          1464:   and http://ucd-snmp.ucdavis.edu/patches/012.patch.  It can not be
        !          1465:   compiled with ucd-snmp-3.6.2.
        !          1466:   
        !          1467:   After applying the patch to ucd-snmp-4.0.1, please configure it with
        !          1468:   SMUX module.
        !          1469:   
        !          1470:   % configure --with-mib-modules=smux
        !          1471:   
        !          1472:   After compile & install ucd-snmp-4.0.1, you will need to configure
        !          1473:   smuxpeer.  I'm now using below configuration.
        !          1474:   
        !          1475:   /usr/local/share/snmp/snmpd.conf
        !          1476:   ================================
        !          1477:   smuxpeer 1.3.6.1.6.3.1 test
        !          1478:   
        !          1479:   Above 1.3.6.1.6.3.1 and test is temporary configuration which is hard
        !          1480:   coded in lib/smux.c. Yes, I know it is bad, I'll change it ASAP.
        !          1481: 
        !          1482: * HUP signal treatment
        !          1483: 
        !          1484:   From zebra-0.80, ripd will reload it's configuration file when ripd
        !          1485:   receives HUP signal.  Other daemon such as bgpd, ospfd will support
        !          1486:   HUP signal treatment soon.
        !          1487: 
        !          1488: * Changes in zebra-0.79
        !          1489: 
        !          1490: * Changes in zebra
        !          1491: 
        !          1492: ** Broadcast address setting on Linux box bug is fixed.
        !          1493: 
        !          1494: ** Protocol daemon can install connected IPv6 route into the kernel.
        !          1495: 
        !          1496: ** Now zebra can handle blackhole route.
        !          1497: 
        !          1498: * Changes in ripd
        !          1499: 
        !          1500: ** Add route-map feature for RIP protocol.
        !          1501: 
        !          1502: ** In case of RIP version 2 routing table entry has IPv4 address and
        !          1503: netmask pair which host part bit is on, ignore the entry.
        !          1504: 
        !          1505: * Changes in ripngd
        !          1506: 
        !          1507: ** Change CMSG_DATA cast from (u_char *) to (int *).  (u_char *) does
        !          1508: not work for NetBSD-currnet on SparcStation 10.
        !          1509: 
        !          1510: * Changes in ospfd
        !          1511: 
        !          1512: ** MaxAge LSA treatment is added.
        !          1513: 
        !          1514: ** ABR/ASBR functionality is added.
        !          1515: 
        !          1516: ** Virtual Link funtionality is added.
        !          1517: 
        !          1518: ** ABR behaviors IBM/Cisco/Shortcut is added.
        !          1519: 
        !          1520: * Changes in ospf6d
        !          1521: 
        !          1522: ** Enclosed KAME specific part with #ifdef #endif
        !          1523: 
        !          1524: * Changes in zebra-0.78
        !          1525: 
        !          1526: * Changes in lib
        !          1527: 
        !          1528: ** SNMP support is started.
        !          1529: 
        !          1530: ** Now Zebra can work on BSD/OS 4.X.
        !          1531: 
        !          1532: ** Now Zebra can compiled on vanilla OpenBSD 2.5 but not yet working correcltly.
        !          1533: 
        !          1534: * Changes in zebra
        !          1535: 
        !          1536: ** Interface index detection using ioctl() bug is fixed.
        !          1537: 
        !          1538: ** Interface information protocol is changed.  Now interface
        !          1539: addition/deletion and interface's address addition/deletion is
        !          1540: separated.
        !          1541: 
        !          1542: * Changes in bgpd
        !          1543: 
        !          1544: ** BGP hold timer bug is fixed.
        !          1545: 
        !          1546: ** BGP keepavlie timer becomes configurable.
        !          1547: 
        !          1548: * Changes in ripd
        !          1549: 
        !          1550: ** When making reply to rip's REQUEST message, fill in
        !          1551: RIP_METRIC_INFINITY with network byte order using htonl ().
        !          1552: 
        !          1553: ** Pass host byte order address to IN_CLASSC and IN_CLASSB macro.
        !          1554: 
        !          1555: * Changes in ospfd
        !          1556: 
        !          1557: ** LSA flooding works.
        !          1558: 
        !          1559: ** Fix bug of DD processing.
        !          1560: 
        !          1561: ** Fix bug of originating router-LSA bug is fixed.
        !          1562: 
        !          1563: ** LSA structure is changed to support LSA aging.
        !          1564: 
        !          1565: * Changes in ospf6d
        !          1566: 
        !          1567: ** `ip6' statement in configuration is changed to `ipv6'.
        !          1568: 
        !          1569: * Changes in zebra-0.77
        !          1570: 
        !          1571: * Changes in lib
        !          1572: 
        !          1573: ** SIGUSR1 reopen logging file.
        !          1574: 
        !          1575: ** route-map is extended to support multi-protocol routing
        !          1576: information.
        !          1577: 
        !          1578: ** When compiling under GNU libc 2.1 environment don't use inet6-apps.
        !          1579: 
        !          1580: * Changes in zebra
        !          1581: 
        !          1582: ** Basic IPv6 router advertisement codes added.  It is not yet usable.
        !          1583: 
        !          1584: ** Fix IPv6 route addition/deletion bug is fixed.
        !          1585: 
        !          1586: ** `show ip route A.B.C.D' works
        !          1587: 
        !          1588: * Changes in bgpd
        !          1589: 
        !          1590: ** When invalid unfeasible routes length comes, bgpd send notify then
        !          1591: continue to process the packet.  Now bgpd stop parsing invalid packet
        !          1592: then return to main loop.
        !          1593: 
        !          1594: ** BGP-4+ withdrawn routes parse bug is fixed.
        !          1595: 
        !          1596: ** When BGP-4+ information passed to non shared network's peer, trim
        !          1597: link-local next-hop information.
        !          1598: 
        !          1599: ** `no redistribute ROUTE_TYPE' withdraw installed routes from BGP
        !          1600: routing information.
        !          1601: 
        !          1602: ** `show ipv6 route IPV6ADDR' command added.
        !          1603: 
        !          1604: ** BGP start timer has jitter.
        !          1605: 
        !          1606: ** Holdtimer configuration bug is fixed.  Now configuration does not
        !          1607: show unconfigured hold time value.
        !          1608: 
        !          1609: * Changes in ripngd
        !          1610: 
        !          1611: ** Now update timer (default 30 seconds) has +/- 50% jitter value.
        !          1612: 
        !          1613: ** Add timers basic command.
        !          1614: 
        !          1615: ** `network' configuration is dynamically reflected.
        !          1616: 
        !          1617: ** `timers basic <update> <timeout> <garbage>' added.
        !          1618: 
        !          1619: * Changes in ripd
        !          1620: 
        !          1621: ** Reconstruct almost codes.
        !          1622: 
        !          1623: ** `network' configuration is dynamically reflected.
        !          1624: 
        !          1625: ** RIP timers now conforms to RFC2453.  So user can configure update,
        !          1626: timeout, garbage timer.
        !          1627: 
        !          1628: ** `timers basic <update> <timeout> <garbage>' works.
        !          1629: 
        !          1630: * Changes in ospfd
        !          1631: 
        !          1632: ** Bug of originating network LSA is fixed.
        !          1633: 
        !          1634: ** `no router ospf' core dump bug is fixed.
        !          1635: 
        !          1636: * Changes in ospf6d
        !          1637: 
        !          1638: ** Redistribute route works.
        !          1639: 
        !          1640: * Changes in zebra-0.76
        !          1641: 
        !          1642: * Changes in lib
        !          1643: 
        !          1644: ** configure.in Linux IPv6 detection problem is fixed.
        !          1645: 
        !          1646: ** Include SERVICES file to the distribution
        !          1647: 
        !          1648: ** Update zebra.texi to zebra-0.76.
        !          1649: 
        !          1650: * Changes in zebra-0.75
        !          1651: 
        !          1652: * Changes in lib
        !          1653: 
        !          1654: ** `termnal length 0' bug is fixed.
        !          1655: 
        !          1656: * Changes in zebra
        !          1657: 
        !          1658: ** When zebra starts up, sweep all zebra installed routes.  If -k or
        !          1659: --keep_kernel option is specified to zebra dameon.  This function is
        !          1660: not performed.
        !          1661: 
        !          1662: * Changes in ripngd
        !          1663: 
        !          1664: ** Aggreagte address command supported.  In router ripngd,
        !          1665: `aggregate-address IPV6PREFIX' works.
        !          1666: 
        !          1667: * Changes in bgpd
        !          1668: 
        !          1669: ** Input route-map's bug which cause segmentation violation is fixed.
        !          1670: 
        !          1671: ** route-map method improved.
        !          1672: 
        !          1673: ** BGP-4+ nexthop detection improved.
        !          1674: 
        !          1675: ** BGP-4+ route re-selection bug is fixed.
        !          1676: 
        !          1677: ** BGP-4+ iBGP route's nexthop calculation works.
        !          1678: 
        !          1679: ** After connection Established `show ip bgp neighbor' display BGP TCP
        !          1680: connection's source and destination address.
        !          1681: 
        !          1682: ** In case of BGP-4+ `show ip bgp neighbor' display BGP-4+ global and
        !          1683: local nexthop which used for originated route.  This address will be
        !          1684: used when `next-hop-self'.
        !          1685: 
        !          1686: * Changes in ospfd
        !          1687: 
        !          1688: ** Fix bug of DR election.
        !          1689: 
        !          1690: ** Set IP precedence field with IPTOS_PREC_INTERNET_CONTROL.
        !          1691: 
        !          1692: ** Schedule NeighborChange event if NSM status change.
        !          1693: 
        !          1694: ** Never include a neighbor in Hello packet, when the neighbor goes
        !          1695: down.
        !          1696: 
        !          1697: * Changes in zebra-0.74
        !          1698: 
        !          1699: * Changes in lib
        !          1700: 
        !          1701: ** Now `terminal length 0' means no line output control.
        !          1702: 
        !          1703: ** `line LINES' command deleted.  Instead of this please use `terminal
        !          1704: length <0-512>'.
        !          1705: 
        !          1706: ** `terminal length <0-512>' is each vty specific configuration so it
        !          1707: can not be configured in the configuration file.  If you want to
        !          1708: configure system wide line control, please use `service
        !          1709: terminal-length <0-512>'.  This configuration affects to the all vty
        !          1710: interface.
        !          1711: 
        !          1712: * Changes in zebra
        !          1713: 
        !          1714: ** Installation of IPv6 route bug is fixed.
        !          1715: 
        !          1716: * Changes in bgpd
        !          1717: 
        !          1718: ** Very serious bug of bgp_stop () is fixed. When multiple route to
        !          1719: the same destination exist, bgpd try to announce the information to
        !          1720: stopped peer.  Then add orphan write thread is added.  This cause
        !          1721: many strange behavior of bgpd.
        !          1722: 
        !          1723: ** Router-id parsing bug is fixed.
        !          1724: 
        !          1725: ** With BGP-4+ nexthop installation was done with global address but
        !          1726: it should be link-local address.  This bug is fixed now.
        !          1727: 
        !          1728: ** When incoming route-map prepend AS, old AS path remained.  Now bgpd
        !          1729: free old AS path.
        !          1730: 
        !          1731: ** `neighbor PEER weight <0-65535>' command added.
        !          1732: 
        !          1733: * Changes in ripngd
        !          1734: 
        !          1735: ** Almost codes are rewritten to conform to RFC2080.
        !          1736: 
        !          1737: * Changes in ospfd
        !          1738: 
        !          1739: ** SPF calculation timer is added.  Currently it is set to 30 seconds.
        !          1740: 
        !          1741: ** SPF calculation works now.
        !          1742: 
        !          1743: ** OSPF routing table codes are added.
        !          1744: 
        !          1745: ** OSPF's internal routes installed into the kernel routing table.
        !          1746: 
        !          1747: ** Now `ospfd' works as non-area, non-external route support OSPF
        !          1748: router.
        !          1749: 
        !          1750: ** Call of log_rotate() is removed.
        !          1751: 
        !          1752: * Changes in ospf6d
        !          1753: 
        !          1754: ** LSA data structure is changed.
        !          1755: 
        !          1756: ** Call of log_rotate() is removed.
        !          1757: 
        !          1758: * Changes in zebra-0.73
        !          1759: 
        !          1760: * Changes in lib
        !          1761: 
        !          1762: ** `config terminal' is changed to `configure terminal'.
        !          1763: 
        !          1764: ** `terminal length <0-512>' command is added.
        !          1765: 
        !          1766: ** Variable length argument was specified by `...'.  Now all strings
        !          1767: started with character `.' is variable length argument.
        !          1768: 
        !          1769: * Changes in zebra
        !          1770: 
        !          1771: ** Internal route (such as iBGP, internal OSPF route) handling works
        !          1772: correctly.
        !          1773: 
        !          1774: ** In interface node, `ipv6 address' and `no ipv6 address' works.
        !          1775: 
        !          1776: ** Interface's address remain after `no ip address' bug is fixed.
        !          1777: 
        !          1778: ** Host route such as IPv4 with /32 mask and IPv6 with /128 mask
        !          1779: didn't set RTF_GATEWAY even it has gateway.  This bug if fixed now.
        !          1780: 
        !          1781: * Changes in bgpd
        !          1782: 
        !          1783: ** `match as-path' argument is used to be specify AS PATH value itself
        !          1784: directly (e.g. ^$).  But it is changed to specify `ip as-apth
        !          1785: access-list' name.
        !          1786: 
        !          1787: ** iBGP route handle works without getting error from the kernel.
        !          1788: 
        !          1789: ** `set aggregator as AS A.B.C.D' command is added to route-map.
        !          1790: 
        !          1791: ** `set atomic-aggregate' command is added to bgpd's routemap.
        !          1792: 
        !          1793: ** Announcement of atomic aggregate attribute and aggregator attribute
        !          1794: works.
        !          1795: 
        !          1796: ** `update-source' bug is fixed.
        !          1797: 
        !          1798: ** When a route learned from eBGP is announced to iBGP, local
        !          1799: preference was set to zero.  But now it set to
        !          1800: DEFAULT_LOCAL_PREF(100).
        !          1801: 
        !          1802: * Changes in ripd
        !          1803: 
        !          1804: ** RIPv1 route filter bug is fixed.
        !          1805: 
        !          1806: ** Some memory leak is fixed.
        !          1807: 
        !          1808: * Changes in ospfd
        !          1809: 
        !          1810: ** Fix bug of DR Election.
        !          1811: 
        !          1812: ** Fix bug of adjacency forming.
        !          1813: 
        !          1814: * Changes in ospf6d
        !          1815: 
        !          1816: ** Clean up logging message.
        !          1817: 
        !          1818: ** Reflect routing information to zebra daemon.
        !          1819: 
        !          1820: * Changes in zebra-0.72
        !          1821: 
        !          1822: * Changes in lib
        !          1823: 
        !          1824: ** When getsockname return IPv4 mapped IPv6 address.  Convert it to
        !          1825: IPv4 address.
        !          1826: 
        !          1827: * Changes in bgpd
        !          1828: 
        !          1829: ** Change route-map's next-hop related settings.
        !          1830: 
        !          1831: set ip nexthop          -> set ip next-hop
        !          1832: set ipv6 nexthop global -> set ipv6 next-hop global
        !          1833: set ipv6 nexthop local  -> set ipv6 next-hop local
        !          1834: 
        !          1835: ** Add `next-hop-self' command.
        !          1836: 
        !          1837: * Changes in ospfd
        !          1838: 
        !          1839: ** Fix bug of multiple `network area' directive crashes.
        !          1840: 
        !          1841: * Changes in zebra-0.71
        !          1842: 
        !          1843: * Changes in lib
        !          1844: 
        !          1845: ** `log syslog' command is added.
        !          1846: 
        !          1847: ** Use getaddrinfo function to bind IPv4/IPv6 server socket.
        !          1848: 
        !          1849: ** `no banner motd' will suppress motd output when user connect to VTY.
        !          1850: 
        !          1851: ** Bind `quit' command to major nodes.
        !          1852: 
        !          1853: * Changes in zebra
        !          1854: 
        !          1855: ** Point-to-point link address handling bug is fixed.
        !          1856: 
        !          1857: * Changes in bgpd
        !          1858: 
        !          1859: ** AS path validity check is added.  If malformed AS path is received
        !          1860: NOTIFY Malformed AS path is send to the peer.
        !          1861: 
        !          1862: ** Use getaddrinfo function to bind IPv4/IPv6 server socket.
        !          1863: 
        !          1864: * Changes in ripd
        !          1865: 
        !          1866: ** Connected network announcement bug is fixed.
        !          1867: 
        !          1868: ** `broadcast' command is deleted.
        !          1869: 
        !          1870: ** `network' command is added.
        !          1871: 
        !          1872: ** `neighbor' command is added.
        !          1873: 
        !          1874: ** `redistribute' command is added.
        !          1875: 
        !          1876: ** `timers basic' command is added.
        !          1877: 
        !          1878: ** `route' command is added.
        !          1879: 
        !          1880: * Changes in ripngd
        !          1881: 
        !          1882: ** Fix metric calculation bug.
        !          1883: 
        !          1884: * Changes in ospfd
        !          1885: 
        !          1886: ** Check sum bug is fixed.
        !          1887: 
        !          1888: * Chanegs in ospf6d
        !          1889: 
        !          1890: ** Routing table code is rewritten.
        !          1891: 
        !          1892: * Changes in zebra-0.70
        !          1893: 
        !          1894: * Changes in zebra
        !          1895: 
        !          1896: ** Critical routing information base calculation bug check is fixed.
        !          1897: 
        !          1898: ** zebra ipv4 message is extended to support external/internal route
        !          1899: flavor.
        !          1900: 
        !          1901: ** Now if internal route doesn't has direct connected nexthop, then
        !          1902: nexthop is calculated by looking up IGP routing table.
        !          1903: 
        !          1904: * Changes in bgpd
        !          1905: 
        !          1906: ** `neighbor PEER update-source IFNAME' command added as ALIAS to
        !          1907: `neighbor PEER interface IFNAME'.
        !          1908: 
        !          1909: * Changes in ospfd
        !          1910: 
        !          1911: ** DD null pointer bug is fixed.
        !          1912: 
        !          1913: * Changes in zebra-0.69
        !          1914: 
        !          1915: * Changes in zebra
        !          1916: 
        !          1917: ** zebra redistirbution supports dynamic notification of the route
        !          1918: change.  If you add static route while running zebra, it will be
        !          1919: reflected to other protocol daemon which set `redistribute static'.
        !          1920: 
        !          1921: ** If static route installation is failed due to the error.  The
        !          1922: static route is not added to the configuration and zebra routing
        !          1923: table.
        !          1924: 
        !          1925: ** zebra sets forwarding flag to on when it starts up.
        !          1926: 
        !          1927: ** `no ip forwarding' turn off IPv4 forwarding.
        !          1928: 
        !          1929: ** `no ipv6 forwarding' turn off IPv6 forwarding.
        !          1930: 
        !          1931: ** Change `show ipforward' command to `show ip forwarding'.
        !          1932: 
        !          1933: ** Change `show ipv6forward' command to `show ipv6 forwarding'.
        !          1934: 
        !          1935: ** `ip route A.B.C.D/M INTERFACE' works.  So you can set `ip route
        !          1936: 10.0.0.0/8 eth0'.
        !          1937: 
        !          1938: * Changes in bgpd
        !          1939: 
        !          1940: ** `neighbor PEER send-community' command is added.  If the option is
        !          1941: set, bgpd will send community attribute to the peer.
        !          1942: 
        !          1943: ** When a BGP route has no-export community attribute and
        !          1944: send-community is set to the peer, the route is not announced to the
        !          1945: peer.
        !          1946: 
        !          1947: * Changes in ripngd
        !          1948: 
        !          1949: ** When ripngd terminates, delete all installed route.
        !          1950: 
        !          1951: ** `redistribute static', `redistribute connected' works.
        !          1952: 
        !          1953: ** Change `debug ripng event' to `debug ripng events'.
        !          1954: 
        !          1955: ** Change `show debug ripng' to `show debugging ripng'.
        !          1956: 
        !          1957: ** Bug of static route deletion is fixed.
        !          1958: 
        !          1959: * Changes in ospfd
        !          1960: 
        !          1961: ** LS request and LS update can be send and received.
        !          1962: 
        !          1963: * Changes in zebra-0.68
        !          1964: 
        !          1965: * Changes in lib
        !          1966: 
        !          1967: ** DEFUN() is extended to support (a|b|c) statement.
        !          1968: 
        !          1969: ** Input buffer overflow bug is fixed.
        !          1970: 
        !          1971: * Changes in bgpd
        !          1972: 
        !          1973: ** `ip community-list' is added.
        !          1974: 
        !          1975: ** set community and match community is added to route-map statement.
        !          1976: 
        !          1977: ** aggregate-address A.B.C.D/M partly works.  Now it works only
        !          1978: summary-only mode.
        !          1979: 
        !          1980: * Changes in zebra
        !          1981: 
        !          1982: ** IPv6 network address delete bug is fixed.
        !          1983: 
        !          1984: * Changes in ospfd
        !          1985: 
        !          1986: ** DR election bug fixed.
        !          1987: 
        !          1988: ** Now Database Description can be send or received.
        !          1989: 
        !          1990: ** Neighbor State Machine goes to Full state.
        !          1991: 
        !          1992: * Changes in ospf6d
        !          1993: 
        !          1994: ** router zebra related bug is fixed.
        !          1995: 
        !          1996: * Changes in zebra-0.67
        !          1997: 
        !          1998: * Changes in lib
        !          1999: 
        !          2000: ** `service password-encryption' is added for encrypted password.
        !          2001: 
        !          2002: * Changes in bgpd
        !          2003: 
        !          2004: ** `set as-path prepend ASPATH' is added to route-map command.
        !          2005: 
        !          2006: ** `set weight WEIGHT' is added to route-map command.
        !          2007: 
        !          2008: ** `no set ipv6 nexthop global' and `no set ipv6 nexthop local'
        !          2009: command is added to route-map.
        !          2010: 
        !          2011: ** `neighbor IP_ADDR version BGP_VERSION' command's BGP_VERSION
        !          2012: argument changed.
        !          2013: 
        !          2014: Old               New
        !          2015: =====================
        !          2016: bgp4              4
        !          2017: bgp4+             4+
        !          2018: bgp4+-draft-00    4-
        !          2019: =====================
        !          2020: 
        !          2021: If you want to peer with old draft version of BGP-4+, please configure
        !          2022: like below:
        !          2023: 
        !          2024: router bgp ASN
        !          2025:  neighbor PEER version 4-
        !          2026: 
        !          2027: ** Some AS path isn't correctly compared during route selection.  Now
        !          2028: it is fixed.
        !          2029: 
        !          2030: * Changes in ospfd
        !          2031: 
        !          2032: ** `router zebra' is default behavior.
        !          2033: 
        !          2034: * Changes in ospf6d
        !          2035: 
        !          2036: ** `router zebra' is default behavior.
        !          2037: 
        !          2038: * Changes in zebra-0.66
        !          2039: 
        !          2040: * Changes in zebra
        !          2041: 
        !          2042: ** When other daemon such as gated install routes into the kernel then
        !          2043: zebra blocks.  This is only occur with netlink socket.  Now socket is
        !          2044: set as NONBLOCKING and problem is fixed.  Reported and fixed by
        !          2045: Patrick Koppen <koppen@rhrk.uni-kl.de>
        !          2046: 
        !          2047: * Changes in bgpd
        !          2048: 
        !          2049: ** Now `router zebra' is not needed to insert BGP routes into the
        !          2050: kernel.  It is default behavior.  If you don't want to install the BGP
        !          2051: routes to the kernel, please configure like below:
        !          2052: 
        !          2053: !
        !          2054: router zebra
        !          2055:  no redistribute bgp
        !          2056: !
        !          2057: 
        !          2058: ** redistribute connected works.
        !          2059: 
        !          2060: ** redistribute static now filter local loopback routes and link local
        !          2061: network.
        !          2062: 
        !          2063: * Changes in ripd
        !          2064: 
        !          2065: ** Some network check is added.  Patch is done by Carlos Alberto
        !          2066: Barcenilla <barce@frlp.utn.edu.ar>
        !          2067: 
        !          2068: * Changes in ripngd
        !          2069: 
        !          2070: ** Sometimes ripngd install wrong nexthop into the kernel.  This bug
        !          2071: is fixed now.
        !          2072: 
        !          2073: ** Now `router zebra' is not needed to insert RIPng routes into the
        !          2074: kernel.  It is default behavior. If you don't want to install the BGP
        !          2075: routes to the kernel, please configure like below:
        !          2076: 
        !          2077: !
        !          2078: router zebra
        !          2079:  no redistribute ripng
        !          2080: !
        !          2081: 
        !          2082: * Changes in zebra-0.65
        !          2083: 
        !          2084: * Changes in lib
        !          2085: 
        !          2086: ** `C-c' changes current node to ENABLE_NODE.  Previously it doesn't.
        !          2087: 
        !          2088: ** In ENABLE_NODE, `exit' command close vty connection.
        !          2089: 
        !          2090: ** `service advanced-vty' enable advanced vty function.  If this
        !          2091: service is specified one can directly connect to ENABLE_NODE when
        !          2092: enable password is not set.
        !          2093: 
        !          2094: ** `lines LINES' command is added by Stephen R. van den Berg
        !          2095: <srb@cuci.nl>.
        !          2096: 
        !          2097: * Changes in zebra
        !          2098: 
        !          2099: ** Basic Linux policy based routing table support is added by Stephen
        !          2100: R. van den Berg <srb@cuci.nl>.
        !          2101: 
        !          2102: * Changes in bgpd
        !          2103: 
        !          2104: ** route-map command is improved:
        !          2105:   `match ip next-hop': New command.
        !          2106:   `match metric': New command.
        !          2107:   `set metric': Doc fixed.
        !          2108:   `set local-preference': DEFUN added.
        !          2109: 
        !          2110: * Changes in ripd
        !          2111: 
        !          2112: ** Check of announced network is added.  Now multicast address is
        !          2113: filtered.  Reported by Carlos Alberto Barcenilla
        !          2114: <barce@frlp.utn.edu.ar>
        !          2115: 
        !          2116: ** Check of network 127 is added.  Reported by Carlos Alberto
        !          2117: Barcenilla <barce@frlp.utn.edu.ar>
        !          2118: 
        !          2119: * Changes in ripngd
        !          2120: 
        !          2121: ** Aging route bug is fixed.
        !          2122: 
        !          2123: ** `router zebra' semantics changed.  ripngd automatically connect to
        !          2124: zebra.
        !          2125: 
        !          2126: * Changes in ospfd
        !          2127: 
        !          2128: ** `no router ospf' works.
        !          2129: 
        !          2130: * Changes in ospf6d
        !          2131: 
        !          2132: ** Bug fix about network vertex.
        !          2133: 
        !          2134: * Changes in zebra-0.64.1.
        !          2135: 
        !          2136: This is bug fix release.
        !          2137: 
        !          2138: * Changes in lib
        !          2139: 
        !          2140: ** Add check of sin6_scope_id in struct sockaddr_in6.  For compilation
        !          2141: on implementation which doesn't have sin6_scope_id.  Reported by Wim
        !          2142: Biemolt <Wim.Biemolt@ipv6.surfnet.nl>.
        !          2143: 
        !          2144: * Changes in zebra
        !          2145: 
        !          2146: ** Fix bug of display BGP routes as "O" instead of "B".  Reported by
        !          2147: "William F. Maton" <wmaton@enterprise.ic.gc.ca> and Dave Hartzell
        !          2148: <hartzell@greatplains.net>.
        !          2149: 
        !          2150: * Changes in bgpd
        !          2151: 
        !          2152: ** `no network IPV6_NETWORK' statement and `no neighbor IP_ADDR timers
        !          2153: holdtime [TIMER]' statement doesn't work. Reported by Georg Hitsch
        !          2154: <georg@atnet.at>.  Now both statement work.
        !          2155: 
        !          2156: * Changes in ospfd
        !          2157: 
        !          2158: ** Last interface is not updated by ospf_if_update().  Reported by
        !          2159: Dave Hartzell <hartzell@greatplains.net>.
        !          2160: 
        !          2161: * Changes in ospf6d
        !          2162: 
        !          2163: ** Byte order of ifid is changed.  Due to this change, this code will
        !          2164: not work with previous version, sorry.
        !          2165: 
        !          2166: ** Fix `show ip route' route type mismatch.
        !          2167: 
        !          2168: ** Fix bug of no network IPV6_NETWORK.
        !          2169: 
        !          2170: ** Important bug fix about intra-area-prefix-lsa.
        !          2171: 
        !          2172: * Changes in zebra-0.64.
        !          2173: 
        !          2174: * Changes in lib
        !          2175: 
        !          2176: ** prefix-list based filtering routine is added.  Currently used in
        !          2177: bgpd but it will be in other daemons.
        !          2178: 
        !          2179: * Changes in bgpd
        !          2180: 
        !          2181: ** `no router bgp' works.  But network statement is not cleared.  This
        !          2182: should be fixed in next beta.
        !          2183: 
        !          2184: ** Route reflector related statement is added.
        !          2185: 
        !          2186:   router bgp ASN
        !          2187:     bgp cluster-id a.b.c.d
        !          2188:     neighbor a.b.c.d route-reflector-client
        !          2189: 
        !          2190:   is added.
        !          2191: 
        !          2192: ** Prefix list based filtering is added.
        !          2193: 
        !          2194:   router bgp ASN
        !          2195:     neighbor a.b.c.d prefix-list PREFIX_LIST_NAME
        !          2196: 
        !          2197: ** Prefix list based routing display works.
        !          2198: 
        !          2199:   show ip bgp prefix-list PREFIX_LIST_NAME
        !          2200: 
        !          2201: * Changes in ripd
        !          2202: 
        !          2203: ** Fix route metric check bug.  Reported from Mr. Carlos Alberto
        !          2204: Barcenilla.
        !          2205: 
        !          2206: * Changes in ospf6d
        !          2207: 
        !          2208: ** There are many changes.  If you have interested in ospf6d please
        !          2209: visit ospf6d/README file.
        !          2210: 
        !          2211: * Changes in zebra-0.63 first beta package.
        !          2212: 
        !          2213: * Changes in lib
        !          2214: 
        !          2215: ** `copy running-config stgartup-config' command is added.
        !          2216: 
        !          2217: ** prefix length check bug is fixed.  Thanks Marlos Barcenilla
        !          2218: <barce@frip.utn.edu.ar>.
        !          2219: 
        !          2220: * Changes in ospfd
        !          2221: 
        !          2222: ** DR and BDR election works.
        !          2223: 
        !          2224: ** OSPF Hello simple authentication works.
        !          2225: 
        !          2226: * Changes in ospf6d
        !          2227: 
        !          2228: ** Now ospf6d can be compiled on both Linux and *BSD system.
        !          2229: 
        !          2230: * Changes in zebra-19990420 snapshot
        !          2231: 
        !          2232: ** `make dist' at top directory works now.
        !          2233: 
        !          2234: * Changes in lib
        !          2235: 
        !          2236: ** VTY has now access-class to restrict remote connection.
        !          2237: Implemented by Alex Bligh <amb@gxn.net>.
        !          2238: 
        !          2239: !
        !          2240: line vty
        !          2241:   access-class ACCESS-LIST-NAME
        !          2242: !
        !          2243: 
        !          2244: ** `show version' command added.  Implemented by Carlos Alberto
        !          2245: Barcenilla <barce@frlp.utn.edu.ar>
        !          2246: 
        !          2247: * Changes in zebra
        !          2248: 
        !          2249: ** `ip address' command on *BSD bug is fixed.
        !          2250: 
        !          2251: ** `no ip address' works now for IPv4 address.
        !          2252: 
        !          2253: ** Now `write terminal' display `ip address' configuration.
        !          2254: 
        !          2255: * Changes in bgpd
        !          2256: 
        !          2257: ** Redistribute static works now.  Please run both zebra and bgpd.
        !          2258: bgpd.conf should be like this:
        !          2259: 
        !          2260: !
        !          2261: router zebra
        !          2262: !
        !          2263: router bgp ASN
        !          2264:   redisitribute static
        !          2265: !
        !          2266: 
        !          2267: * Changes in guile
        !          2268: 
        !          2269: ** configure --enable-guile turns on zebra-guile build.
        !          2270: 
        !          2271: ** (router-bgp ASN) allocates real bgp structre.
        !          2272: 
        !          2273: * Changes in zebra-19990416 snapshot
        !          2274: 
        !          2275: ** Set version to 0.60 for preparation of beta release.
        !          2276: 
        !          2277: ** New directory guile is added for linking with guile interpreter.
        !          2278: 
        !          2279: * Changes in zebra
        !          2280: 
        !          2281: ** On GNU/Linux Kernel 2.2.x (with netlink support), zebra detects
        !          2282: asynchronous routing updates.  *BSD support is not yet finished.
        !          2283: 
        !          2284: * Changes in bgpd
        !          2285: 
        !          2286: ** `show ip bgp regexp ASPATH_REGEX' uses CISCO like regular expression 
        !          2287: instead of RPSL like regular expression.  I'm planing to provide RPSL
        !          2288: like regular expression with `show ip bgp rpsl' or something.
        !          2289: 
        !          2290: * Changes in lib
        !          2291: 
        !          2292: ** Press '?' at variable mandatory argument, vty prints nothing.  Now
        !          2293: vty outputs description about the argument.  Fixed by Alex Bligh
        !          2294: <amb@gxn.net>
        !          2295: 
        !          2296: ** buffer.c has some ugly bugs.  Due to the bug, vty interface hangs
        !          2297: when large output date exists.  This bug is fixed. Reported by Alex
        !          2298: Bligh <amb@gxn.net>.
        !          2299: 
        !          2300: * Changes in ospfd
        !          2301: 
        !          2302: ** DR and BDR information is shown by `show ip ospf interface' command.
        !          2303: 
        !          2304: * Changes in zebra-19990408 snapshot
        !          2305: 
        !          2306: * Changes in bgpd
        !          2307: 
        !          2308: ** Old BGP-4+ specification (described in old draft) treatment bug is
        !          2309: fixed.  It seems that mrtd uses this format as default.  So if you
        !          2310: have problem peering with mrtd and want to use old draft format please
        !          2311: use version statement like this.
        !          2312: 
        !          2313: neighbor PEER_ADDRESS remote-as ASN
        !          2314: neighbor PEER_ADDRESS version bgp4+-draft-00
        !          2315: 
        !          2316: ** When AS path is epmty (routes generated by bgpd), SEGV is occur
        !          2317: when announce the routes to eBGP peer.  Reported by
        !          2318: kad@gibson.skif.net.
        !          2319: 
        !          2320: ** ip as-path access-list command is added.
        !          2321: 
        !          2322: ** neighbor PEER_ADDRESS filter-list AS_LIST [in|out] command is added.
        !          2323: 
        !          2324: ** neighbor PEER_ADDRESS timers holdtimer TIMER command is added.
        !          2325: 
        !          2326: * Changes in all daemons
        !          2327: 
        !          2328: ** With KAME stack, terminal interface is now bind AF_INET socket
        !          2329: instead of AF_INET6 one.
        !          2330: 
        !          2331: * Changes in zebra-19990403 snapshot
        !          2332: 
        !          2333: * Changes in bgpd
        !          2334: 
        !          2335: ** When bgpd has 'router zebra', bgpd automatically select it's router
        !          2336: ID as most highest interface's IP Address.
        !          2337: 
        !          2338: ** When AS path is empty (in case of iBGP), it doesn't include any AS
        !          2339: segment.  This change is for announcement to gated under iBGP.
        !          2340: 
        !          2341: * Changes in ospfd
        !          2342: 
        !          2343: ** OSPF hello packet send/receive works.
        !          2344: 
        !          2345: * Changes in ospf6d
        !          2346: 
        !          2347: ** Yasuhiro Ohara's ospf6d codes is imported.  It is under development
        !          2348: and can't be compiled on any platform.
        !          2349: 
        !          2350: * Changes in zebra-19990327 snapshot
        !          2351: 
        !          2352: * Changes in bgpd
        !          2353: 
        !          2354: ** When BGP-4+ connection is done by IPv6 link-local address.  One
        !          2355: have to specify interface index for the connection.  So I've added
        !          2356: interface statement to the neighbor commmand.  Please specify
        !          2357: interface name for getting interface index like below.  This statement
        !          2358: only works on GNU/Linux.  I'll support BSD ASAP.
        !          2359: 
        !          2360: router bgp 7675
        !          2361:  neighbor fe80::200:f8ff:fe01:5fd3 remote-as 2500
        !          2362:  neighbor fe80::200:f8ff:fe01:5fd3 interface sit3
        !          2363: 
        !          2364: ** For disable BGP peering `shutdown' command is added.
        !          2365: 
        !          2366: router bgp 7675
        !          2367:  neighbor 10.0.0.1 shutdown
        !          2368: 
        !          2369: ** `description' command is added to neighbor statement.
        !          2370: 
        !          2371: router bgp 7675
        !          2372:  neighbor 10.0.0.1 description peering with Norway.
        !          2373: 
        !          2374: ** `show ip bgp regexp AS-REGEXP' works again.
        !          2375: 
        !          2376: show ip bgp regexp AS7675
        !          2377: 
        !          2378: will show routes which include AS7675.
        !          2379: 
        !          2380: ** When a route which is made from `network' statement is send to
        !          2381: neighbor.  Set it's nexthop to self.  So 10.0.0.0/8 is announced to
        !          2382: the peer A with source address 192.168.1.1.  The routes nexthop is set
        !          2383: to 192.168.1.1.
        !          2384: 
        !          2385: * Changes in zebra
        !          2386: 
        !          2387: ** In zebra/rtread_sysctl.c, function rtm_read() may overrun allocated
        !          2388: buffer when the address family is not supported and the length is big
        !          2389: (i.e link address).  Reported Achim Patzner <ap@bnc.net>.
        !          2390: 
        !          2391: * Changes in ospfd
        !          2392: 
        !          2393: ** Now ospfd receive OSPF packet.
        !          2394: 
        !          2395: * Changes in zebra-19990319 snapshot
        !          2396: 
        !          2397: * Changes in configuration and libraries
        !          2398: 
        !          2399: ** User can disable IPv6 feature and/or pthread feature by configure
        !          2400:    option.
        !          2401: 
        !          2402:   To disable IPv6:    configure --disable-ipv6
        !          2403:   To disable pthread: configure --disable-pthread
        !          2404: 
        !          2405: ** User can disable specified daemon by configure option.
        !          2406: 
        !          2407:   Don't make zebra:  configure --disable-zebra
        !          2408:   Don't make bgpd:   configure --disable-bgpd
        !          2409:   Don't make ripd:   configure --disable-ripd
        !          2410:   Don't make ripngd: configure --disable-ripngd
        !          2411:   Don't make ospfd:  configure --disable-ospfd
        !          2412:   Don't make ospf6d: configure --disable-ospf6d
        !          2413: 
        !          2414: ** Sample configuration files are installed as 600 file flag.
        !          2415:    Suggested by Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>.
        !          2416: 
        !          2417: ** syslog logging feature is added by Peter Galbavy
        !          2418:    <Peter.Galbavy@knowledge.com>
        !          2419: 
        !          2420: ** Inclusion of standard header files is reworked by Peter Galbavy
        !          2421:    <Peter.Galbavy@knowledge.com>
        !          2422: 
        !          2423: ** Change description from GNU/Linux 2.1.X to GNU/Linux 2.2.X
        !          2424: 
        !          2425: ** If daemon function exists in standard C library use it.
        !          2426: 
        !          2427: ** To generate configure script we upgrade autoconf to 2.13.  To
        !          2428: generate Makefile.in we upgrade automake to 1.4.
        !          2429: 
        !          2430: ** doc/texinfo.tex is added to distribution.
        !          2431: 
        !          2432: ** Update ports/pkg/DESCR description.
        !          2433: 
        !          2434: ** Update doc/zebra.texi.
        !          2435: 
        !          2436: ** logfile FILENAME statement deleted.  Instead of that please use log
        !          2437: file FILENAME.
        !          2438: 
        !          2439: * Changes in zebra
        !          2440: 
        !          2441: * Changes in bgpd
        !          2442: 
        !          2443: ** Communication between zebra and bgpd works now.  So if there is
        !          2444:    `router zebra' line in bgpd.conf, selected route is installed
        !          2445:    into kernel routing table.
        !          2446: 
        !          2447: ** Delete all routes which inserted by bgpd when bgpd dies.  If you
        !          2448: want to retain routes even bgpd dies please specify [-r|--retain]
        !          2449: option to bgpd.
        !          2450: 
        !          2451: ** BGP announcement code is reworked.  Now bgpd announce selected
        !          2452:    routes to other peer.
        !          2453: 
        !          2454: ** All output bgp packet is buffered.  It's written to the socket when
        !          2455:    it gets ready.
        !          2456: 
        !          2457: ** Output route-map works now.  You can specify output route-map by:
        !          2458: 
        !          2459:    neighbor IP_ADDR route-map ROUTE_MAP_NAME out
        !          2460: 
        !          2461: ** New route-map command added.
        !          2462: 
        !          2463:    set ip nexthop IP_ADDR
        !          2464:    set ipv6 nexthop global IP_ADDR
        !          2465: 
        !          2466: ** Fix bug about unlock of the route_node structure.
        !          2467: 
        !          2468: ** BGP-4+ support is added.  bgpd can listen and speak BGP-4+ packet
        !          2469: specified in RFC2283. You can view IPv6 bgp table by: `show ipv6 bgp'.
        !          2470: 
        !          2471: ** Meny packet overflow check is added.
        !          2472: 
        !          2473: * Changes in ripd
        !          2474: 
        !          2475: * Changes in ripngd
        !          2476: 
        !          2477: * Changes in ospfd
        !          2478: 
        !          2479: ** ospfd work is started by Toshiaki Takada <takada@zebra.org>.  Now
        !          2480: several files are included in ospfd directory.
        !          2481: 
        !          2482: ** ospf6d codes are merged from Yasuhiro Ohara <yasu@sfc.wide.ad.jp>'s
        !          2483: ospfd work.  Now codes are located in ospf6d directory.
        !          2484: 
        !          2485: 
        !          2486: Local variables:
        !          2487: mode: outline
        !          2488: paragraph-separate: "[         ]*$"
        !          2489: end:

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