H3C Technologies H3C S3100V2 Series Switches - Manual (Page 34)

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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
CAUTION:
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 might 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 might prevent multicast forwarding entries from being correctly
created at the data link layer and eventually cause multicast traffic forwarding to fail. To avoid the
aforesaid problem, when a Layer 2 device acts as an IGMP snooping querier, 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:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure the source address of
IGMP general queries igmp-snooping general-query source-ip
{ ip-address | current-interface } Optional
0.0.0.0 by default
Configure the source IP address of
IGMP group-specific queries igmp-snooping special-query source-ip
{ ip-address | current-interface } Optional
0.0.0.0 by default
CAUTION:
The source address of IGMP query messages might affect the IGMP querier election within the segment.
Configuring IGMP snooping proxying
Configuration prerequisites
Before you configure IGMP snooping proxying in a VLAN, complete the following tasks:
• Enable IGMP snooping in the VLAN