Configuring Source Ip Address Of Igmp Queries; Configuring An Igmp Snooping Policy; Configuration Prerequisites - 3Com 4510G Configuration Manual

To do...
Configure the maximum
response time to IGMP general
queries
Configure the IGMP
last-member query interval
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...
Enter system view
Enter VLAN view
Configure the source address
of IGMP general queries
Configure the source IP
address of IGMP
group-specific queries
The source address of IGMP query messages may affect IGMP querier selection within the segment.

Configuring an IGMP Snooping Policy

Configuration Prerequisites

Before configuring an IGMP Snooping policy, complete the following task:
Enable IGMP Snooping in the VLAN
Use the command...
igmp-snooping max-response-time
interval
igmp-snooping
last-member-query-interval interval
Use the command...
system-view
vlan vlan-id
igmp-snooping general-query source-ip
{ current-interface | ip-address }
igmp-snooping special-query source-ip
{ current-interface | ip-address }
2-13
Remarks
Optional
10 seconds by default
Optional
1 second by default
Remarks
—
—
Optional
0.0.0.0 by default
Optional
0.0.0.0 by default