3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring Basic Functions of MLD Snooping 655
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■ MLD Snooping must be enabled globally before it can be enabled in a VLAN.
■ When you enable MLD Snooping in a specified VLAN, this function takes effect
for Ethernet ports in this VLAN only.
■ After enabling MLD Snooping in a VLAN, you cannot enable MLD and/or IPv6
PIM on the corresponding VLAN interface, and vice versa.
Configuring Port Aging
Timers
If the switch does not receive an MLD general query or an IPv6 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 MLD report for an IPv6 multicast group before
the aging timer of a member port expires, the switch deletes this port from the
forwarding table for that IPv6 multicast group when the aging timers times out.
If IPv6 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:
Enable MLD Snooping in the
VLAN
mld-snooping enable Required
Disabled by default
To do... Use the command... Remarks
To do... Use the command... Remarks
Enter system view system-view -
Enter MLD Snooping view mld-snooping -
Configure router port aging
time
router-aging-time interval Optional
260 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
mld-snooping
router-aging-time interval
Optional
260 seconds by default
Configure member port aging
time
mld-snooping
host-aging-time interval
Optional
260 seconds by default