Operation Manual – IGMP Snooping
Quidway S3100 Series Ethernet Switches
Chapter 1 IGMP Snooping Configuration
Huawei Technologies Proprietary
1-6
1.2.2 Configuring Timers
This configuration task is to manually configure the aging time of the router port, the
aging time of the multicast member ports, and the query response timeout time.
z
If the switch receives no general query message from a router within the aging
time of the router port, the switch removes the router port from the port member
lists of all MAC multicast groups.
z
If the switch receives no IGMP report message within the aging time of a member
port, it transmits a group-specific query message to the port and starts the query
response timer of the IP multicast group.
z
If the switch receives no IGMP report message within the query response timeout
time, it removes the port from the member port list of the multicast group.
Table 1-5
Configure timers
Operation
Command
Description
Enter system view
system
-
view
—
Configure the
aging time of the
router port
igmp-snooping router-aging-time
seconds
Optional
By default, the aging
time of the router
port is 105 seconds.
Configure the
query response
timeout time
igmp-snooping max-response-time
seconds
Optional
By default, the query
response timeout
time is 10 seconds.
Configure the
aging time of
multicast member
ports
igmp-snooping host-aging-time
seconds
Optional
By default, the aging
time of multicast
member ports is 260
seconds.
1.2.3 Enabling IGMP Fast Leave Processing
Normally, when receiving an IGMP Leave message, IGMP Snooping does not
immediately remove the port from the multicast group, but sends a group-specific query
message. If no response is received in a given period, it then removes the port from the
multicast group.
If IGMP fast leave processing is enabled, when receiving an IGMP Leave message,
IGMP Snooping immediately removes the port from the multicast group. When a port
has only one user, enabling IGMP fast leave processing on the port can save
bandwidth.