3Com Switch 8800 Family Configuration Guide

IGMP Snooping Configuration 423
■ Isolate-user-VLAN supports the IGMP-Snooping function. After IGMP-Snooping
is enabled under isolate-user-VLAN, all secondary VLANs are IGMP-Snooping
enabled. It makes no sense to enable IGMP-Snooping for a secondary VLAN.
■ In a secondary VLAN, IGMP packets will be directly converted and processed in
isolate-user-VLAN, namely all the multicast services are implemented within
isolate-user-VLAN.
■ Ports in secondary VLANs cannot be used as source addresses of multicast.
Configuring Router Port
Aging Time
This task is to manually configure the router port aging time. If the switch has not
received any general query message from the router before the router port is
aged, it will remove the port from all MAC multicast groups.
Perform the following configuration in system view.
By default, the router port aging time is 105s.
Configuring Maximum
Response Time
This task is to manually configure the maximum response time. If the Ethernet
switch receives no report message from a port within the maximum response time,
it will remove the port from the multicast group.
Perform the following configuration in system view.
By default, the maximum response time is 1 seconds.
Configuring Aging Time
of Multicast Group
Member Ports
This task is to manually set the aging time of the multicast group member port. If
the Ethernet switch receives no multicast group report message during the
member port aging time, it will transmit the specific query message to that port
and starts a maximum response timer.
Perform the following configuration in system view.
Tab le 412 Configure router port aging time
Operation Command
Configure router port aging time igmp-snooping router-aging-time seconds
Restore the default aging time of the router
port
undo igmp-snooping router-aging-time
Tab le 413 Configure the maximum response time
Operation Command
Configure the maximum response time
igmp-snooping max-response-time
seconds
Restore the default setting undo IGMP-snooping max-response-time
Tab le 414 Configure aging time of the multicast member ports
Operation Command
Configure aging time of the multicast
member
igmp-snooping host-aging-time seconds
Restore the default setting undo igmp-snooping host-aging-time