3Com 8807 Configuration Manual page 423

Configuring Router Port
Aging Time
Configuring Maximum
Response Time
Configuring Aging Time
of Multicast Group
Member Ports
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.
■
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.
Table 412 Configure router port aging time
Operation
Configure router port aging time
Restore the default aging time of the router
port
By default, the router port aging time is 105s.
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.
Table 413 Configure the maximum response time
Operation
Configure the maximum response time
Restore the default setting
By default, the maximum response time is 1 seconds.
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.
Table 414 Configure aging time of the multicast member ports
Operation
Configure aging time of the multicast
member
Restore the default setting
IGMP Snooping Configuration
Command
igmp-snooping router-aging-time seconds
undo igmp-snooping router-aging-time
Command
igmp-snooping max-response-time
seconds
undo IGMP-snooping max-response-time
Command
igmp-snooping host-aging-time seconds
undo igmp-snooping host-aging-time
423