
Configuring IP Multicasting and Multimedia Services
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Specifying a Designated Router Timeout Interval
By default, 140 seconds (2 minutes, 20 seconds) can elapse after the last host
query message before IGMP considers the designated router to be down.
You can use the BCC or Site Manager to specify a router timeout interval from 10
through 8192 seconds (2 hours, 16 minutes, and 32 seconds). The value you
specify should be greater than the query rate of all IGMP routers on the network.
The suggested value is two times the value of the interface query rate plus 20
seconds.
Using the BCC
To specify a designated router timeout interval, navigate to the IGMP prompt for
the interface (for example,
box; ethernet/2/1; ip/2.2.2.2/255.255.255.0; igmp
)
and enter:
dr-timeout
<seconds>
seconds
is an interval from 10 through 8192 seconds.
For example, the following command sets the router timeout interval to 200
seconds (3 minutes, 20 seconds):
igmp/2.2.2.2/3#
dr-timeout 200
igmp/2.2.2.2/3#
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