Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
Chapter 2 IGMP Snooping Configuration
2-16
To do...
Use the command...
Remarks
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 may be deleted by mistake.
2.5.4 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
will not set that port as a 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
{
current-interface
|
ip-address
}
Optional
0.0.0.0 by default
Configure the source IP
address of IGMP
group-specific queries
igmp-snooping
special-query source-ip
{
current-interface
|
ip-address
}
Optional
0.0.0.0 by default
Caution:
The source address of IGMP query messages may affect IGMP querier selection within
the segment.
