IGMP snooping: a VLAN-based multicast protocol

This paper introduces a VLAN-based multicast protocol, which supports multicast communication over switch Ethernet. This protocol restricts the multicast traffic of an IP multicast group in a VLAN. It starts with a table including an IP multicast group and the corresponding VLAN. Then it can get the multicast session information to maintain the table by snooping the IGMP messages sent by hosts or routers. In this paper, we give the basic idea, syntax and semantics of this protocol. Finally, an experiment and its results are also provided.