Chapter 30
| Multicast Routing Commands
PIM Multicast Routing
– 1043 –
Example
This example sets the priority used in the bidding process for the DR.
Console(config)#interface vlan 1
Console(config-if)#ip pim dr-priority 20
Console(config-if)#end
Console#show ip pim interface
PIM is enabled.
VLAN 1 is up.
PIM Mode : Sparse Mode
IP Address : 192.168.0.2
Hello Interval : 30 sec
Hello HoldTime : 105 sec
Triggered Hello Delay : 5 sec
Join/Prune Holdtime : 210 sec
Lan Prune Delay : Disabled
Propagation Delay : 500 ms
Override Interval : 2500 ms
DR Priority : 20
Join/Prune Interval : 60 sec
Console#
ip pim
join-prune-interval
This command sets the join/prune timer. Use the no form to restore the default
setting.
Syntax
ip pim join-prune-interval seconds
no ip pim join-prune-interval
seconds - The interval at which join/prune messages are sent. (Range: 1-
65535 seconds)
Default Setting
60 seconds
Command Mode
Interface Configuration (VLAN)
Command Usage
◆ By default, the switch sends join/prune messages every 210 seconds to inform
other PIM-SM routers about clients who want to join or leave a multicast group.
◆ Use the same join/prune message interval on all the PIM-SM routers in the
same PIM-SM domain, otherwise the routing protocol’s performance will be
adversely affected.
◆ The multicast interface that first receives a multicast stream from a particular
source forwards this traffic only to those interfaces on the router that have
requested to join this group. When there are no longer any requesting groups
on that interface, the leaf node sends a prune message upstream and enters a
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