Displaying And Maintaining Igmp - 3Com Switch 4800G 24-Port Configuration Manual

Configuring IGMP Fast
Leave Processing
Displaying and
Maintaining IGMP
To do...
Enter system view
Enter interface view
Configure IGMP query interval igmp timer query interval
Configure the IGMP querier
robustness variable
Configure the maximum
response time for IGMP
general queries
Configure the IGMP last
member query interval
Configure the other querier
present interval
n
If not statically configured, the other querier present interval is [ IGMP query
■
interval ] times [ IGMP robustness variable ] plus [ maximum response time for
IGMP general queries ] divided by two. By default, the values of these three
parameters are 60 (seconds), 2 and 10 (seconds) respectively, so the default
value of the other querier present interval = 60 × 2 + 10 / 2 = 125 (seconds).
If statically configured, the other querier present interval takes the configured
■
value.
c
CAUTION:
Make sure that the other querier present interval is greater than the IGMP
■
query interval; otherwise the IGMP querier may change frequently on the
network.
Make sure that the IGMP query interval is greater than the maximum response
■
time for IGMP general queries; otherwise, multicast group members may be
wrongly removed.
The configurations of the maximum response time for IGMP general queries,
■
the IGMP last member query interval and the IGMP other querier present
interval are effective only for IGMPv2 or IGMPv3.
Fast leave processing is implemented by IGMP Snooping. For details, see
"Configuring Fast Leave Processing" on page 562.
To do...
View IGMP multicast group
information
View IGMP layer 2 port
information

Displaying and Maintaining IGMP

Use the command...
system-view
interface interface-type
interface-number
igmp robust-count
robust-value
igmp max-response-time
interval
igmp
last-member-query-interval
interval
igmp timer
other-querier-present
interval
Use the command...
display igmp group [ group-address |
interface interface-type
interface-number ] [ static | verbose ]
display igmp group port-info [ vlan
vlan-id ] [ verbose ]
623
Description
-
-
Optional
60 seconds by default
Optional
2 by default
Optional
10 seconds by default
Optional
1 second by default
Optional
For the system default, see
"Note" below.
Description
Available in any
view
Available in any
view