C
HAPTER
46
| Multicast Routing Commands
PIM Multicast Routing
– 1109 –
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
â—† 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.
â—† 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.
â—† 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 prune state for this multicast stream.
The protocol maintains both the current join state and the pending
Reverse Path Tree (RPT) prune state for this (source, group) pair until
the join/prune-interval timer expires.
EXAMPLE
This example sets the priority used in the bidding process for the DR.
Console(config)#interface vlan 1
Console(config-if)#ip pim join-prune-interval 210
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
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