Configuring Common Pim Timers - HP FlexFabric 5950 series Configuration Manual

5. Set the PIM message
propagation delay.
6. Set the override interval.
7. Enable neighbor tracking.
8. Enable dropping hello
messages without the
Generation ID option.

Configuring common PIM timers

IMPORTANT:
To prevent the upstream neighbors from aging out, you must configure the interval for sending
join/prune messages to be less than the joined/pruned state holdtime timer.
The following are common timers in PIM:
•
Hello interval—Interval at which a PIM router sends hello messages to discover PIM
neighbors, and maintain PIM neighbor relationship.
•
Triggered hello delay—Maximum delay for sending a hello message to avoid collisions
caused by simultaneous hello messages. After receiving a hello message, a PIM router waits
for a random time before sending a hello message. This random time is in the range of 0 to the
triggered hello delay.
•
Join/Prune interval—Interval at which a PIM router sends join/prune messages to its
upstream routers for state update.
•
Joined/Pruned state holdtime—Time for which a PIM router keeps the joined/pruned state for
the downstream interfaces. This joined/pruned state holdtime is specified in a join/prune
message.
•
Multicast source lifetime—Lifetime that a PIM router maintains for a multicast source. If a
router does not receive subsequent multicast data from the multicast source S when the timer
expires, it deletes the (S, G) entry for the multicast source.
You can configure common PIM timers for all interfaces in PIM view or for the current interface in
interface view. The configuration made in interface view takes priority over the configuration made in
PIM view.
TIP:
As a best practice, use the defaults for a network without special requirements.
Configuring common PIM timers globally
Step
1. Enter system view.
2. Enter PIM view.
3. Set the hello interval.
4. Set the join/prune
interval.
pim hello-option lan-delay delay
pim hello-option
override-interval interval
pim hello-option
neighbor-tracking
pim require-genid
Command
system-view
pim [ vpn-instance vpn-instance-name ]
timer hello interval
timer join-prune interval
147
The default setting is 500
milliseconds.
The default setting is 2500
milliseconds.
By default, neighbor tracking is
disabled.
By default, an interface accepts
hello messages without the
Generation ID option.
Remarks
N/A
N/A
The default setting is 30
seconds.
The default setting is 60
seconds.
This configuration takes effect
after the current interval ends.