Configuring The Prune Delay; Configuring Pim Common Timers - HP A5500 SI Switch Series Configuration Manual

To do...
Configure the priority for DR
election
Configure PIM neighbor timeout
time
Configure the prune message
delay time (LAN-delay)
Configure the prune override
interval
Disable join suppression
Configure the interface to reject
hello messages without a
generation ID

Configuring the prune delay

If a downstream router does not support the prune override interval field, configure a prune delay
interval on the upstream router so that it will not perform the prune action immediately after it receives
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...
Enter system view
Enter public network PIM view or
VPN instance PIM view
Configure the prune delay interval

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 a hello message. This delay 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.
Any router that has lost assert election will prune its downstream interface and maintain the assert state
for a period of time. When the assert state times out, the assert losers will resume multicast forwarding.
Use the command...
pim hello-option dr-priority
priority
pim hello-option holdtime interval
pim hello-option lan-delay interval
pim hello-option override-interval
interval
pim hello-option neighbor-
tracking
pim require-genid
Use the command...
system-view
pim [ vpn-instance vpn-instance-
name ]
prune delay interval
159
Remarks
Optional
1 by default.
Optional
105 seconds by default.
Optional
500 milliseconds by default.
Optional
2,500 milliseconds by default.
Required
Enabled by default.
Required
By default, hello messages without
Generation_ID are accepted.
Remarks
—
—
Optional
3 seconds by default.