H3C Technologies H3C S10500 Series Switches - Manual (Page 44)

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To do... Use the command... Remarks
Set the IGMP general query
interval
igmp-snooping query-interval interval
Required
60 seconds by default.
Set the maximum response time for
IGMP general queries
igmp-snooping max-response-time interval
Required
10 seconds by default.
Set the IGMP last-member query
interval igmp-snooping
last-member-query-interval interval Required
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
After the switch receives an IGMP query whose source IP address is 0.0.0.0 on a port, it 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 this
problem, when a Layer 2 switch acts as the IGMP snooping querier, H3C recommends you 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:
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 }
Required
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 } Required
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
• Determine the source IP address for the IGMP reports sent by the proxy
• Determine the source IP address for the IGMP leave messages sent by the proxy