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Next: Class Node Up: 24.2 Internals of Multicast Previous: McastProtocol class

24.2.2 Extensions to other classes in

In the earlier chapter describing nodes in Chapterchap:nodes, we described the internal structure of the node in . To briefly recap that description, the node entry for a multicast node is the switch
. It looks at the highest bit to decide if the destination is a multicast or unicast packet. Multicast packets are forwarded to a multicast classifier which maintains a list of replicators; there is one replicator per source, group tuple. Replicators copy the incoming packet and forward to all outgoing interfaces.