Configuring Source Ip Address Of Igmp Queries; Configuring Igmp Snooping Proxying; Enabling Igmp Snooping Proxying - 3Com S7906E Configuration Manual

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 IGMP Snooping Proxying

Configuration Prerequisites
Before configuring IGMP snooping Proxying in a VLAN, enable IGMP snooping in the VLAN and
prepare the following data:
Source IP address for the IGMP reports sent by the proxy
Source IP address for the IGMP leave messages sent by the proxy

Enabling IGMP Snooping Proxying

The IGMP snooping Proxying function works on a per-VLAN basis. After you enable the function in a
VLAN, the device works as the IGMP snooping proxy for the downstream hosts and upstream router in
the VLAN.
Follow these steps to enable IGMP snooping Proxying in a VLAN:
To do...
Enter system view
Enter VLAN view
Enable IGMP snooping
Proxying in the VLAN
Use the command...
system-view
vlan vlan-id
igmp-snooping general-query source-ip
{ ip-address | current-interface }
igmp-snooping special-query source-ip
{ ip-address | current-interface }
Use the command...
system-view
vlan vlan-id
igmp-snooping proxying
enable
1-17
Remarks
—
—
Optional
0.0.0.0 by default
Optional
0.0.0.0 by default
Remarks
—
—
Required
Disabled by default.