Release 1.0
Configuring IP Multicast Routing
526360-001-00 Rev. B
MGBI
9-11
If you need to return to IGMP Version 2, use the
ip igmp version 2
command in
Interface Configuration mode to return the version of IGMP on the BSR to IGMP
Version 2:
MOT(config-if)#
ip igmp version 2
Modifying the IGMP Host-Query Message Interval
When the BSR is configured for multicast routing, it can periodically send IGMP
host-query messages to connected networks in order to refresh multicast group
member information or discover new multicast group members. These messages are
sent to the all-systems group address of 224.0.0.1 with a time-to-live (TTL) of 1.
The BSR uses the highest IP address for its multicast network and is responsible for
sending IGMP host-query messages to all hosts on the subnetwork. The BSR sends
IGMP host-query messages every 60 seconds to keep the IGMP overhead low on
hosts and networks connected to the BSR by default.
Use the
ip igmp query-interval
command in Interface Configuration mode to change
the IGMP host-query message interval:
MOT(config-if)#
ip igmp query-interval
<
1-3600
>
where:
1-3600
is the time interval in seconds that the BSR sends IGMP host-query
messages to connected networks.
Specifying the IGMP Querier Time-out Interval
IGMP Version 2 allows a time interval to be specified for a querier to surrender its
function as the querier for the interface over to the BSR. The BSR then becomes the
querier for the interface.
Use the
ip igmp querier-timeout
command in Interface Configuration mode to
specify the IGMP querier timeout interval:
MOT(config-if)#
ip igmp querier-timeout <
60-3600
>
where:
Note:
The time interval should be twice the number of seconds as the IGMP
query interval.
Summary of Contents for BSR 2000
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