HP A5500 EI Switch Series, Руководство по настройке

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To do... Use the command... Remarks
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, 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... Use the command... Remarks
Enter system view system-view —
Enter public network PIM view or
VPN instance PIM view pim [ vpn-instance vpn-instance-
name ]
—
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 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.