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Dell Converged Enhanced Ethernet Administrator’s Guide 129
53-1002116-01
Monitoring IGMP
15
IGMP snooping querier sends out IGMP queries to trigger IGMP responses from switches that wish
to receive IP multicast traffic. IGMP snooping listens for these responses to map the appropriate
forwarding addresses.
Refer to the CEE Command Reference for complete information about the commands in this
section.
Use the following procedure to configure the IGMP snooping querier.
1. Enter the configure terminal command to access global configuration mode.
2. Activate the default IGMP querier functionality for the VLAN.
switch(conf-if-vl-25)#ip igmp snooping querier enable vlan 25
3. Activate IGMP querier functionality for the VLAN.
The valid range is 1 to 18000 seconds. The default is 125 seconds.
switch(config)#ip igmp query-interval 125
4. Set the last member query interval.
The valid range is 1000 to 25500 milliseconds. The default is 1000 milliseconds.
switch(config)#ip igmp last-member-query-interval 1000
5. Set the Max Response Time (MRT).
The valid range is 1 to 25 seconds. The default is 10 seconds.
switch(config)#ip igmp query-max-response-time 10
Monitoring IGMP
Monitoring the performance of your IGMP traffic allows you to diagnose any potential issues on
your switch. This helps you utilize bandwidth more efficiently by setting the switch to forward IP
multicast traffic only to connected hosts that request multicast traffic.
Refer to the CEE Command Reference for complete information about the commands in this
section.
Use the following procedure to monitor IGMP snooping on a CEE/FCoE switch.
1. Enter the enable command to access Privileged EXEC mode.
2. Enter the show ip igmp groups command to display all information on IGMP multicast groups
for the switch.
Use this command to display the IGMP database, including configured entries for either all
groups on all interfaces, or all groups on specific interfaces, or specific groups on specific
interfaces.
switch#show ip igmp groups
3. Use the show ip igmp statistics command to display the IGMP statistics for a VLAN or interface.
switch#show ip igmp snooping statistics interface vlan 1