Configuring Pim Common Timers - HP 4800G Series Configuration Manual

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.
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.
Configuring PIM common timers globally
Follow these steps to configure PIM common timers globally:
To do...
Enter system view
Enter PIM view
Configure the hello interval
Configure the join/prune
interval
Configure the join/prune
timeout time
Configure assert timeout time
Configure the multicast source
lifetime
Configuring PIM common timers on an interface
Follow these steps to configure PIM common timers on an interface:
To do...
Enter system view
Enter interface view
Configure the hello interval
Use the command...
system-view
pim
timer hello interval
timer join-prune interval
holdtime join-prune interval
holdtime assert interval
source-lifetime interval
Use the command...
system-view
interface interface-type
interface-number
pim timer hello interval
1-34
Remarks
—
—
Optional
30 seconds by default
Optional
60 seconds by default
Optional
210 seconds by default
Optional
180 seconds by default
Optional
210 seconds by default
Remarks
—
—
Optional
30 seconds by default