Monitoring IGMP and IGMP Proxy

IP hosts use Internet Group Management Protocol (IGMP) in IPv4 to report their multicast group memberships to neighboring routers. Similarly, multicast routers, such as an E Series router, use IGMP to discover which of their hosts belong to multicast groups.

Note: The output for monitor and show commands from E120 and E320 routers is identical to the output from other E Series routers, except that the output from E120 and E320 routers includes information about the adapter identifier in the interface specifier (slot/adapter/port).

The following topics describe how to monitor IGMP for IP multicast and IGMP proxy on an E Series router: