R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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2. Configuring hello options on an interface
Follow these steps to configure hello options on an interface:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter interface view
interface interface-type
interface-number
—
Configure the priority for DR
election
pim hello-option dr-priority priority
Optional
1 by default
Configure PIM neighbor timeout
time
pim hello-option holdtime interval
Optional
105 seconds by default
Configure the prune message
delay time (LAN-delay)
pim hello-option lan-delay interval
Optional
500 milliseconds by default
Configure the prune override
interval
pim hello-option override-interval
interval
Optional
2,500 milliseconds by default
Disable join suppression pim hello-option neighbor-tracking
Required
Enabled by default
Configure the interface to reject
hello messages without a
generation ID
pim require-genid
Required
By default, hello messages without
Generation_ID are accepted
Configuring the prune delay
If a downstream router does not support the prune override interval field, you can configure a prune
delay interval on the upstream router so that it will not perform the prune action immediately after
receiving the prune message; instead, it maintains the current forwarding state for the prune delay
interval. In this period, if the upstream router receives a join message from the downstream router, it
cancels the prune action.
Follow these steps to configure the prune delay time
To do... Use the command... Remarks
Enter system view system-view —
Enter public instance PIM view pim —
Configure the prune delay
interval
prune delay interval
Optional
3 seconds by default
Configuring PIM common timers
PIM routers discover PIM neighbors and maintain PIM neighboring relationships with other routers by
periodically sending out hello messages.
Upon receiving a hello message, a PIM router waits a random period, which is smaller than the
maximum delay between hello messages, before sending out a hello message. This avoids collisions that
occur when multiple PIM routers send hello messages simultaneously.
A PIM router periodically sends join/prune messages to its upstream for state update. A join/prune
message contains the join/prune timeout time. The upstream router sets a join/prune timeout timer for
each pruned downstream interface.