H3C LS-3100-52P-OVS-H3 Operation Manual - page 984
1-33
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 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 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...
Use the command...
Remarks
Enter system view
system-view
—
Enter PIM view
pim
—
Configure the hello interval
timer hello interval
Optional
30 seconds by default