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ES3000 User Guide
4-42
4.2.30 IGMP Snooping->IGMP Snooping Config->IGMP Snooping
Configuration Menu
The Internet Group Management Protocol (IGMP) is an Internet protocol allowing a host to report its
multicast group membership to multicast routers. Multicasting allows one computer on the Internet
to send information to other computers having identified themselves as interested in receiving the
information. The ES3000 can “snoop” the messaging protocol to keep track of multicast groups and
to insure multicast traffic is sent only to the appropriate ports within a VLAN. In networks where
multimedia applications generate multicast traffic, IGMP can reduce unnecessary bandwidth by
limiting traffic forwarding otherwise broadcast to the network. Enabling IGMP allows individual ports
to detect IGMP queries, report packets, and manage IP multicast traffic through the switch.