Brocade Network OS Administrator’s Guide v4.1.1 - Manual (Page 646)

NOTE
An IGMP snooping querier cannot be configured on the same interface as a multicast router (mrouter)
interface.
Refer to the Network OS 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. Enter the interface command to select the VLAN interface number.
switch(config)# interface 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-vlan-25)# 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-vlan-25)# 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-vlan-25)# ip igmp query-max-response-time 10
6. Activate the IGMP querier functionality for the VLAN.
switch(config-vlan-25)# ip igmp snooping querier enable
Monitoring IGMP snooping
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 Network OS Command Reference for complete information about the commands in this
section.
Use the following procedure to monitor IGMP snooping on a DCB/FCoE switch.
1. Enter the configure terminal command to access global configuration 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, 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 10
4. Use the show ip igmp snooping mrouter command to display mrouter port-related information for
all VLANs, or a specific VLAN.
switch# show ip igmp snooping mrouter
or
switch# show ip igmp snooping mrouter interface vlan 10
5. When you have reviewed the IGMP statistics for the switch, refer to Configuring IGMP snooping on
page 645 or Configuring IGMP snooping querier on page 645 to make any needed corrections.
Monitoring IGMP snooping
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