3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring IGMP-Related Functions 549
to the port and interested in the same multicast group will fail to receive multicast
data for that group.
Configuring Port Aging
Timers
If the switch does not receive an IGMP general query or a PIM hello message
before the aging timer of a router port expires, the switch deletes this port from
the router port list when the aging timer times out.
If the switch does not receive an IGMP report for a multicast group before the
aging timer of a member port expires, the switch deletes this port from the
forwarding table for that multicast group when the aging timers times out.
If multicast group memberships change frequently, you can set a relatively small
value for the member port aging timer, and vice versa.
Configuring port aging timers globally
Follow these steps to configure port aging timers globally:
Configuring port aging timers in a VLAN
Follow these steps to configure port aging timers in a VLAN:
Configuring
IGMP-Related
Functions
Configuration
Prerequisites
Before configuring IGMP-related functions, complete the following task:
■ Enable IGMP Snooping in the VLAN
Before configuring IGMP-related functions, consider the following points:
■ IGMP general query interval
■ IGMP last-member query interval
■ Maximum response time to IGMP general queries
To do... Use the command... Remarks
Enter system view system-view -
Enter IGMP Snooping view igmp-snooping -
Configure router port aging
time
router-aging-time interval Optional
105 seconds by default
Configure member port aging
time
host-aging-time interval Optional
260 seconds by default
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN view vlan vlan-id -
Configure router port aging
time
igmp-snooping
router-aging-time interval
Optional
105 seconds by default
Configure member port aging
time
igmp-snooping
host-aging-time interval
Optional
260 seconds by default