C
HAPTER
46
| Multicast Routing Commands
PIM Multicast Routing
– 1097 –
DEFAULT SETTING
500 milliseconds
COMMAND MODE
Interface Configuration (VLAN)
COMMAND USAGE
The override interval configured by the ip pim override-interval command
and the propogation delay configured by this 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 propagation delay represents the time required for the
lan-prune-delay message to be propgated down from the upstream router
to all downstream routers attached to the same VLAN interface.
EXAMPLE
Console(config-if)#ip pim propagation-delay 600
Console(config-if)#
RELATED COMMANDS
ip pim override-interval (1096)
ip pim lan-prune-delay (1095)
ip pim trigger-hello-
delay
This command configures the maximum time before transmitting a
triggered PIM Hello message after the router is rebooted or PIM is enabled
on an interface. Use the no form to restore the default value.
SYNTAX
ip pim triggerr-hello-delay seconds
no ip pim triggerr-hello-delay
seconds - The maximum time before sending a triggered PIM Hello
message. (Range: 0-5 seconds)
DEFAULT SETTING
5 seconds
COMMAND MODE
Interface Configuration (VLAN)
COMMAND USAGE
â—† When a router first starts or PIM is enabled on an interface, the hello
delay is set to random value between 0 and the trigger-hello-delay. This
prevents synchronization of Hello messages on multi-access links if
multiple routers are powered on simultaneously.
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