Configuring An Igmp Snooping Policy - 3Com Switch 4800G 24-Port Configuration Manual

Configuring Source IP
Address of IGMP Queries
Configuring an IGMP
Snooping Policy
Configuration
Prerequisites
Configuring IGMP queries and responses in a VLAN
Follow these steps to configure IGMP queries and responses in a VLAN:
To do...
Enter system view
Enter VLAN view
Configure IGMP general
query interval
Configure the maximum
response time to IGMP
general queries
Configure the IGMP
last-member query interval
c
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.
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...
Enter system view
Enter VLAN view
Configure the source address
of IGMP general queries
Configure the source IP
address of IGMP
group-specific queries
c
CAUTION: The source address of IGMP query messages may affect IGMP querier
selection within the segment.
Before configuring an IGMP Snooping policy, complete the following task:
Enable IGMP Snooping in the VLAN or enable IGMP on the desired VLAN
■
interface

Configuring an IGMP Snooping Policy

Use the command...
system-view
vlan vlan-id
igmp-snooping
query-interval interval
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 }
565
Remarks
-
-
Optional
60 seconds by default
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