Setting A Priority To Determine The Designated Router; Configuring The Pim Join/Prune Message Interval - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

Setting a Priority to Determine the Designated Router

You can influence whether a particular router is selected as the designated router
with the ip pim dr-priority command. A higher priority value increases the likelihood
that a router is selected as the designated router, while a lower value decreases the
likelihood. The ip pim dr-priority command in Router Configuration mode sets the
designated router priority on all the PIM interfaces on the router. To override this
global setting on a particular interface, use the ip pim dr-priority command in
Interface Configuration mode.
NOTE: You cannot set the designated router priority on PIM dense mode interfaces.
ip pim dr-priority

Configuring the PIM Join/Prune Message Interval

When you use the router for PIM, the router sends join/prune messages to the
upstream RPF neighbor. The default join/prune message interval is 60 seconds. You
can configure the join/prune message interval using the ip pim join-prune-interval
command. The ip pim join-prune-interval command in Router Configuration mode
configures the join-prune interval on all the PIM interfaces on the router. To override
this global setting on a particular interface, use the ip pim join-prune-interval
command in Interface Configuration mode.
The hold-time associated with the PIM join/prune interval messages is 3.5 times the
PIM join/prune message interval.
NOTE: You cannot configure the PIM join/prune message interval on PIM DM
interfaces.
ip pim join-prune-interval
Use to set a priority value, in the range 1–254, by which a router is likely to be
selected as the designated router.
Examples
In Router Configuration mode:
host1(config-if)#ip pim dr-priority 24
In Interface Configuration mode:
host1(config-subif)#ip pim dr-priority 24
Use the no version to restore the default value, 1.
See ip pim dr-priority.
Chapter 3: Configuring PIM for IPv4 Multicast

Setting a Priority to Determine the Designated Router

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