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1.1     ! misho       1: @c -*-texinfo-*-
        !             2: @c This is part of the Quagga Manual.
        !             3: @c @value{COPYRIGHT_STR}
        !             4: @c See file quagga.texi for copying conditions.
        !             5: @node Babel
        !             6: @chapter Babel
        !             7: 
        !             8: Babel is an interior gateway protocol that is suitable both for wired
        !             9: networks and for wireless mesh networks.  Babel has been described as
        !            10: ``RIP on speed'' --- it is based on the same principles as RIP, but
        !            11: includes a number of refinements that make it react much faster to
        !            12: topology changes without ever counting to infinity, and allow it to
        !            13: perform reliable link quality estimation on wireless links.  Babel is
        !            14: a double-stack routing protocol, meaning that a single Babel instance
        !            15: is able to perform routing for both IPv4 and IPv6.
        !            16: 
        !            17: Quagga implements Babel as described in RFC6126.
        !            18: 
        !            19: @menu
        !            20: * Configuring babeld::          
        !            21: * Babel configuration::         
        !            22: * Babel redistribution::        
        !            23: * Show Babel information::      
        !            24: * Babel debugging commands::    
        !            25: @end menu
        !            26: 
        !            27: @node Configuring babeld, Babel configuration, Babel, Babel
        !            28: @section Configuring babeld
        !            29: 
        !            30: The @command{babeld} daemon can be invoked with any of the common
        !            31: options (@pxref{Common Invocation Options}).
        !            32: 
        !            33: The @command{zebra} daemon must be running before @command{babeld} is
        !            34: invoked. Also, if @command{zebra} is restarted then @command{babeld}
        !            35: must be too.
        !            36: 
        !            37: Configuration of @command{babeld} is done in its configuration file
        !            38: @file{babeld.conf}.
        !            39: 
        !            40: @node Babel configuration, Babel redistribution, Configuring babeld, Babel
        !            41: @section Babel configuration
        !            42: 
        !            43: @deffn Command {router babel} {}
        !            44: @deffnx Command {no router babel} {}
        !            45: Enable or disable Babel routing.
        !            46: @end deffn
        !            47: 
        !            48: @deffn {Babel Command} {network @var{ifname}} {}
        !            49: @deffnx {Babel Command} {no network @var{ifname}} {}
        !            50: Enable or disable Babel on the given interface.
        !            51: @end deffn
        !            52: 
        !            53: @deffn {Interface Command} {babel wired} {}
        !            54: @deffnx {Interface Command} {babel wireless} {}
        !            55: Specifies whether this interface is wireless, which disables a number
        !            56: of optimisations that are only correct on wired interfaces.
        !            57: Specifying @code{wireless} (the default) is always correct, but may
        !            58: cause slower convergence and extra routing traffic.
        !            59: @end deffn
        !            60: 
        !            61: @deffn {Interface Command} {babel split-horizon}
        !            62: @deffnx {Interface Command} {no babel split-horizon}
        !            63: Specifies whether to perform split-horizon on the interface.
        !            64: Specifying @code{no babel split-horizon} (the default) is always
        !            65: correct, while @code{babel split-horizon} is an optimisation that
        !            66: should only be used on symmetric and transitive (wired) networks.
        !            67: @end deffn
        !            68: 
        !            69: @deffn {Interface Command} {babel hello-interval <20-655340>}
        !            70: Specifies the time in milliseconds between two scheduled hellos.  On
        !            71: wired links, Babel notices a link failure within two hello intervals;
        !            72: on wireless links, the link quality value is reestimated at every
        !            73: hello interval.  The default is 4000@dmn{ms}.
        !            74: @end deffn
        !            75: 
        !            76: @deffn {Interface Command} {babel update-interval <20-655340>}
        !            77: Specifies the time in milliseconds between two scheduled updates.
        !            78: Since Babel makes extensive use of triggered updates, this can be set
        !            79: to fairly high values on links with little packet loss.  The default
        !            80: is 20000@dmn{ms}.
        !            81: @end deffn
        !            82: 
        !            83: @deffn {Babel Command} {babel resend-delay <20-655340>}
        !            84: Specifies the time in milliseconds after which an ``important''
        !            85: request or update will be resent.  The default is 2000@dmn{ms}.  You
        !            86: probably don't want to tweak this value.
        !            87: @end deffn
        !            88: 
        !            89: @node Babel redistribution, Show Babel information, Babel configuration, Babel
        !            90: @section Babel redistribution
        !            91: 
        !            92: @deffn {Babel command} {redistribute @var{kind}}
        !            93: @deffnx {Babel command} {no redistribute @var{kind}}
        !            94: Specify which kind of routes should be redistributed into Babel.
        !            95: @end deffn
        !            96: 
        !            97: @node Show Babel information, Babel debugging commands, Babel redistribution, Babel
        !            98: @section Show Babel information
        !            99: 
        !           100: @deffn {Command} {show babel database} {}
        !           101: @deffnx {Command} {show babel interface} {}
        !           102: @deffnx {Command} {show babel neighbour} {}
        !           103: @deffnx {Command} {show babel parameters} {}
        !           104: These commands dump various parts of @command{babeld}'s internal
        !           105: state.  They are mostly useful for troubleshooting.
        !           106: @end deffn
        !           107: 
        !           108: @node Babel debugging commands,  , Show Babel information, Babel
        !           109: @section Babel debugging commands
        !           110: 
        !           111: @deffn {Babel Command} {debug babel @var{kind}} {}
        !           112: @deffnx {Babel Command} {no debug babel @var{kind}} {}
        !           113: Enable or disable debugging messages of a given kind.  @var{kind} can
        !           114: be one of @samp{common}, @samp{kernel}, @samp{filter}, @samp{timeout},
        !           115: @samp{interface}, @samp{route} or @samp{all}.  Note that if you have
        !           116: compiled with the NO_DEBUG flag, then these commands aren't available.
        !           117: @end deffn
        !           118: