Cisco Systems C3850NM410G - page 35

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To display the multicast groups that are directly connected to the switch and that were learned through IGMP, use
the “show ip igmp groups” command in privileged EXEC mode.
Switch#show ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
239.255.255.255 Vlan413 4d18h 00:02:42 10.32.104.1
239.255.255.255 Vlan412 4d18h 00:01:39 10.33.170.1
239.255.255.250 Vlan412 01:27:18 00:02:45 10.33.170.75
To display the reachability to the multicast group with ICMP echo request, use the “Ping” command in privileged
EXEC mode.
Switch#ping 239.255.255.255
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 239.255.255.255, timeout is 2 seconds:
Reply to request 0 from 10.32.104.1, 20 ms
Reply to request 0 from 10.33.170.1, 20 ms
Reply to request 0 from 10.32.104.1, 20 ms
To display multicast-related information of an interface, use the “Show ip igmp interface vlan” command in
privileged EXEC mode.
Switch#show ip igmp interface vlan412
Vlan412 is up, line protocol is up
Internet address is 10.33.170.1/24
IGMP is enabled on interface
Current IGMP host version is 3
Current IGMP router version is 3
IGMP query interval is 60 seconds
IGMP configured query interval is 60 seconds
IGMP querier timeout is 120 seconds
IGMP configured querier timeout is 120 seconds
IGMP max query response time is 10 seconds
Last member query count is 2
Last member query response interval is 1000 ms
Inbound IGMP access group is not set
IGMP activity: 43 joins, 38 leaves
Multicast routing is enabled on interface
Multicast TTL threshold is 0
Multicast designated router (DR) is 10.33.170.1 (this system)
IGMP querying router is 10.33.170.1 (this system)
Multicast groups joined by this system (number of users):
224.2.127.254(1) 239.255.255.255(1)