3Com S7902E Command Reference Manual - page 360
2-22
onu-protocol igmp-snooping
Syntax
onu-protocol igmp-snooping
{
host-aging-time host-aging-time
|
leave-aggregation enable
|
max-response-time max-response-time
|
report-aggregation enable
|
router-aging-time
router-aging-time
}
undo
onu-protocol igmp-snooping
{
host-aging-time
|
leave-aggregation enable
|
max-response-time
|
report-aggregation enable
|
router-aging-time
}
View
ONU port view
Default Level
2: System level
Parameters
host-aging-time
: Aging time of multicast group member port, in seconds. It is in the range 200 to 1000
and defaults to 260.
leave-aggregation enable
: Enables IGMP leave message suppression.
max-response-time
: Maximum response time (in seconds) of group-specific queries. It is in the range 1
to 25 and defaults to 1.
report-aggregation enable
: Enables IGMP report message suppression
router-aging-time
: Router port aging time, in seconds. It is in the range 1 to 1000 and defaults to 105.
The
max-response-time
keyword in the
onu-protocol igmp-snooping
command sets the maximum
response time of the group-specific queries. If the device receives no response at the first timeout of the
maximum response time, it re-sends group-specific queries. If the device still receives no response
within the maximum response time, the multicast group on the corresponding ONU is deleted.
Description
Use the
onu-protocol igmp-snooping
command to configure IGMP snooping-related timers and
IGMP membership report suppression.
Use the
undo onu-protocol igmp-snooping
command to restore the defaults.
By default, IGMP join suppression is disabled, while IGMP leave suppression is enabled.
Note the following:
The aging time of multicast group member ports determines how often multicast group members
are refreshed. In an environment where multicast group members change frequently, a relatively
shorter aging time is required.