Neighbor establishment passes manual Neighbor addition w/ state (potential flood) passes manual Neighbor timeout passes manual Neighbor timeout w/ state (potential prune) passes manual Cache miss-create S,G state passes manual Packet forwarding on flood (fwd to nbr) passes manual Packet forwarding on flood (fwd to host) passes manual MRT entry refresh on data passes manual MRT entry timeout passes manual IGMP group membership caching w/o state passes manual IGMP group membership report w/ state passes manual IGMP group membership leave w/ state passes manual passes manual passes manual passes manual