Configuring The Prune Delay; Configuring Pim Common Timers - HP 6125G Configuration Manual

Step
4. Configure PIM neighbor
timeout time.
5. Configure the prune message
delay time (LAN-delay).
6. Configure the prune override
interval.
7. Disable join suppression.
8. Configure the interface to
reject hello messages without
a generation ID.

Configuring the prune delay

Configuring a prune delay interval on an upstream router on a shared network segment can make the
upstream router not perform the prune action immediately after it receives the prune message from its
downstream router. Instead, the upstream router maintains the current forwarding state for a period of
time that the prune delay interval defines. In this period, if the upstream router receives a join message
from the downstream router, it cancels the prune action. Otherwise, it performs the prune action.
To configure the prune delay time:
Step
1. Enter system view.
2. Enter PIM view.
3. 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.
After 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.
When a router fails to receive subsequent multicast data from multicast source S, the router does not
immediately delete the corresponding (S, G) entry. Instead, it maintains the (S, G) entry for a period of
time (namely, the multicast source lifetime) before deleting the (S, G) entry.
Command
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
Command
system-view
pim
prune delay interval
132
Remarks
Optional.
105 seconds by default.
Optional.
500 milliseconds by default.
Optional.
2,00 milliseconds by default.
Enabled by default.
By default, hello messages without
Generation_ID are accepted.
Remarks
N/A
N/A
Optional.
By default, the prune delay is not
configured.