Chapter 30
| Multicast Routing Commands
PIM Multicast Routing
– 1028 –
a Join message. If no join messages are received after the prune delay expires,
this router will prune the flow.
◆ Prune delay is the sum of the effective propagation-delay and effective
override-interval, where effective propagation-delay is the largest
propagation-delay from those advertised by each neighbor (including this
switch), and effective override-interval is the largest override-interval from
those advertised by each neighbor (including this switch).
Example
Console(config-if)#ip pim lan-prune-delay
Console(config-if)#
Related Commands
ip pim override-interval (1028)
ip pim propagation-delay (1029)
ip pim
override-interval
This command configures the override interval, or the time it takes a downstream
router to respond to a lan-prune-delay message. Use the no form to restore the
default setting.
Syntax
ip pim override-interval milliseconds
no ip pim override-interval
milliseconds - The time required for a downstream router to respond to a
lan-prune-delay message by sending back a Join message if it wants to
continue receiving the flow referenced in the message. (Range: 500-6000
milliseconds)
Default Setting
2500 milliseconds
Command Mode
Interface Configuration (VLAN)
Command Usage
The override interval configured by this command and the propagation delay
configured by the ip pim propagation-delay command are used to calculate the
LAN prune delay. If a downstream router has group members which want to
continue receiving the flow referenced in a LAN prune delay message, then the
override interval represents the time required for the downstream router to process
the message and then respond by sending a Join message back to the upstream
router to ensure that the flow is not terminated.
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