H3C Technologies H3C S5120 Series Switches - Manual (Page 319)

2-14
To do... Use the command... Remarks
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:
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
The source address of IGMP query messages may affect IGMP querier selection within the segment.
Configuring IGMP Snooping Proxying
Configuration Prerequisites
Before configuring IGMP snooping Proxying in a VLAN, enable IGMP snooping in the VLAN and
prepare the following data: