H3C Technologies H3C S7500E Series Switches - Manual (Page 49)

2-17
To do... Use the command... Remarks
Configure the maximum
response time to IGMP general
queries
max-response-time interval
Optional
10 seconds by default
Configure the IGMP
last-member query interval
last-member-query-interval interval
Optional
1 second by default
Configuring IGMP queries and responses in a VLAN
Follow these steps to configure IGMP queries and responses in a VLAN:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure IGMP general query
interval
igmp-snooping query-interval interval
Optional
60 seconds by default
Configure the maximum
response time to IGMP general
queries
igmp-snooping max-response-time
interval
Optional
10 seconds by default
Configure the IGMP
last-member query interval
igmp-snooping
last-member-query-interval interval
Optional
1 second by default
In the configuration, make sure that the IGMP general query interval is larger than the
maximum response time for IGMP general queries. Otherwise, multicast group members may
be deleted by mistake.
Configuring Source IP Address of IGMP Queries
Upon receiving an IGMP query whose source IP address is 0.0.0.0 on a port, the switch does
not enlist that port as a dynamic router port. This may prevent multicast forwarding entries from
being correctly created at the data link layer and cause multicast traffic forwarding failure in the
end. When a Layer 2 device acts as an IGMP-Snooping querier, to avoid the aforesaid problem,
you are commended to configure a non-all-zero IP address as the source IP address of IGMP
queries.
Follow these steps to configure source IP address of IGMP queries: