Chapter 51
| Multicast Routing Commands
PIM Multicast Routing
– 1202 –
sending periodic Join/Prune messages toward a group-specific RP for each
group. A single DR is elected per interface (LAN or otherwise) using a simple
election process.
â—† The router with the highest priority configured on an interface is elected as the
DR. If more than one router attached to this interface uses the same priority,
then the router with the highest IP address is elected to serve as the DR.
â—† If a router does not advertise a priority in its hello messages, it is assumed to
have the highest priority and is elected as the DR. If more than one router is not
advertising its priority, then the router with the highest IP address is elected to
serve as the DR.
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)
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