Determining IGMP Version Running

Determining which IGMP version is running on an interface rtr-a>show ip igmp interface e0 Ethernet0 is up, line protocol is up

Internet address is 1.1.1.1, subnet mask is 255.255.255.0

IGMP is enabled on interface

Current IGMP version is 2

CGMP is disabled on interface

IGMP query interval is 60 seconds

IGMP querier timeout is 120 seconds

IGMP max query response time is 10 seconds

Inbound IGMP access group is not set

Multicast routing is enabled on interface

Multicast TTL threshold is 0

Multicast designated router (DR) is 1.1.1.1 (this system) IGMP querying router is 1.1.1.1 (this system) Multicast groups joined: 224.0.1.40 224.2.127.254

Use the show ip igmp interface command to determine which version of IGMP is currently active on an interface.

The IGMP version is indicated by the line in the example that reads "Current IGMP version is

© 2006 Cisco Systems, Inc. Implementing Multicast 7-25

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