H3C Technologies H3C S7500E Series Switches - Manual (Page 385)

13-34
To do... Use the command... Remarks
Configure the prune message
delay time (LAN-delay)
pim ipv6 hello-option
lan-delay interval
Optional
500 milliseconds by default
Configure the prune override
interval
pim ipv6 hello-option
override-interval interval
Optional
2,500 milliseconds by default
Disable join suppression
pim ipv6 hello-option
neighbor-tracking
Required
Enabled by default
Configure the interface to reject
hello messages without a
generation ID
pim ipv6 require-genid
Required
By default, hello messages
without Generation_ID are
accepted.
Configuring the Prune Delay
If a downstream router on a multi-access LAN does not support the prune override interval
option, you can configure the prune delay time on the upstream router so that it will not perform
the prune action immediately after receiving the prune message; instead, it maintains the
current forwarding state for a period of prune delay time. 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 IPv6 PIM view pim ipv6 —
Configure the prune delay
interval
prune delay interval
Optional
3 seconds by default
Configuring IPv6 PIM Common Timers
IPv6 PIM routers discover IPv6 PIM neighbors and maintain IPv6 PIM neighboring relationships
with other routers by periodically sending out hello messages.
Upon receiving a hello message, an IPv6 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 IPv6 PIM routers send hello messages
simultaneously.
An IPv6 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.