Static IGMP

To receive multicast traffic, a host must explicitly join a multicast group by sending an IGMP (Internet Group Management Protocol) report; then, the traffic is forwarded to that host. In some situations, you might like multicast traffic to be forwarded to a port where a multicast-enabled host is not available (for example, when you test multicast configurations).

Static IGMP emulates a host or router attached to a switch port, so that multicast traffic is forwarded to that port, and the switch sends a proxy join for all the statically configured IGMP groups when an IGMP query is received. You can emulate a host to forward a particular multicast group to a port; and you may emulate a router to forward all multicast groups to a port. Static IGMP is only available with IGMPv2.

To emulate a host on a port, use the following command:
configure igmp snooping {vlan} vlan_name {ports port_list}add static group ip_address
To emulate a multicast router on a port, use the following command:
configure igmp snooping {vlan} vlan_name {ports port_list}add static router
To remove these entries, use the corresponding commands:
configure igmp snooping {vlan} vlan_name {ports port_list }delete static group [ip_address | all]

configure igmp snooping vlan vlan_name {ports port_list } delete static router
To display the IGMP snooping static groups, use the following command:
show igmp snooping {vlan} vlan_name static [group | router]

Published March 2020prev | next

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