HP VPN Firewall Appliances Network Management Configuration Guide

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Ste
p
Command Remarks
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Set the DR priority.
pim ipv6 hello-option dr-priority
priority
Optional.
1 by default.
4. Set the neighbor lifetime.
pim ipv6 hello-option holdtime
interval
Optional.
105 seconds by default.
5. Set the prune message delay.
pim ipv6 hello-option lan-delay
interval
Optional.
500 milliseconds by default.
6. Set the override interval.
pim ipv6 hello-option
override-interval interval
Optional.
2500 milliseconds by default.
7. Enable the neighbor tracking
function.
pim ipv6 hello-option
neighbor-tracking
Disabled by default.
8. Enable dropping hello
messages without the
Generation ID option.
pim ipv6 require-genid
By default, an interface accepts
hello message without the
Generation ID option.
Setting the prune delay timer
The prune delay timer on an upstream router in a shared-media network can make the upstream router
not perform the prune action immediately after receiving 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 timer 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 set the prune delay timer:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IPv6 PIM view.
pim ipv6 N/A
3. Set the prune delay timer.
prune delay interval
Optional.
By default, no prune delay timer is set.
Configuring common IPv6 PIM timers
IPv6 PIM routers discover IPv6 PIM neighbors and maintain IPv6 PIM neighboring relationship with other
routers by periodically sending hello messages.
After receiving a hello message, an IPv6 PIM router waits a random period, which is smaller than the
maximum delay between hello messages, before sending 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 timer. The upstream router sets a join/prune timeout timer for
each pruned downstream interface.