Configuring Fast Leave Processing - 3Com 4500 PWR 26-Port Configuration Manual

Follow these steps to configure timers:
To do...
Enter system view
Configure the aging
timer of the router port
Configure the general
query response timer
Configure the aging
timer of the multicast
member port

Configuring Fast Leave Processing

With fast leave processing enabled, when the switch receives an IGMP leave message on a port, the
switch directly removes that port from the forwarding table entry for the specific group.
If only one host is attached to the port, enable fast leave processing helps improve bandwidth and
resource usage. If fast leave processing and unknown multicast packet dropping or non-flooding are
enabled on a port to which more than one host is connected, when one host leaves a multicast group,
the other hosts connected to port and interested in the same multicast group will fail to receive multicast
data for that group.
Enabling fast leave processing in system view
Follow these steps to enable fast leave processing in system view:
To do...
Enter system view
Enable fast leave
processing
Enabling fast leave processing in Ethernet port view
Follow these steps to enable fast leave processing in Ethernet view:
To do...
Enter system view
Enter Ethernet port view
Enable fast leave processing
for specific VLANs
Use the command...
system-view
igmp-snooping
router-aging-time seconds
igmp-snooping
max-response-time
seconds
igmp-snooping
host-aging-time seconds
Use the command...
system-view
igmp-snooping fast-leave [ vlan
vlan-list ]
Use the command...
system-view
interface interface-type
interface-number
igmp-snooping fast-leave
[ vlan vlan-list ]
27-7
Remarks
—
Optional
By default, the aging time of the router
port is 105 seconds.
Optional
By default, the general query response
timeout time is 10 seconds.
Optional
By default, the aging time of multicast
member ports is 260 seconds
Remarks
—
Required
By default, the fast leave processing
feature is disabled.
Remarks
—
—
Required
By default, the fast leave
processing feature is disabled.