HP FlexNetwork 7500 Series Configuration Manual page 341

override interval). If interface receives a join message before the timer expires, the router
does not prune the interface. Otherwise, the router prunes the interface.
If you enable neighbor tracking on an upstream router, this router can track the states of the
downstream nodes for which the joined state holdtime timer has not expired. If you want to
enable neighbor tracking, you must enable it on all IPv6 PIM routers on a shared-media LAN.
Otherwise, the upstream router cannot track join messages from every downstream routers.
•
Generation ID—A router generates a generation ID for hello messages when an interface is
enabled with IPv6 PIM. The generation ID is a random value, but only changes when the status
of the router changes. If an IPv6 PIM router finds that the generation ID in a hello message from
the upstream router has changed, it considers that the status of the upstream router has
changed. In this case, it sends a join message to the upstream router for status update. You can
configure an interface to drop hello messages without the generation ID options to promptly
know the status of an upstream router.
You can configure hello message options globally for all interfaces in IPv6 PIM view or for an
interface in interface view. For an interface, the interface-specific configuration takes priority over the
global configuration.
Configuring hello message options globally
Step
Enter system view.
1.
Enter IPv6 PIM view.
2.
Set the DR priority.
3.
Set the neighbor lifetime.
4.
Set the IPv6 PIM message
5.
propagation delay for a
shared-media LAN.
Set the override interval.
6.
Enable neighbor tracking.
7.
Configuring hello message options on an interface
Step
Enter system view.
1.
Enter interface view.
2.
Set the DR priority.
3.
Set the neighbor lifetime.
4.
Set the IPv6 PIM message
5.
propagation delay.
Set the override interval.
6.
Enable neighbor tracking.
7.
Command
system-view
ipv6 pim [ vpn-instance
vpn-instance-name ]
hello-option dr-priority priority
hello-option holdtime time
hello-option lan-delay delay
hello-option override-interval
interval
hello-option neighbor-tracking
Command
system-view
interface interface-type
interface-number
ipv6 pim hello-option
dr-priority priority
ipv6 pim hello-option holdtime
time
ipv6 pim hello-option lan-delay
delay
ipv6 pim hello-option
override-interval interval
ipv6 pim hello-option
neighbor-tracking
331
Remarks
N/A
N/A
The default setting is 1.
The default setting is 105
seconds.
The default setting is 500
milliseconds.
The default setting is 2500
milliseconds.
By default, neighbor tracking is
disabled.
Remarks
N/A
N/A
The default setting is 1.
The default setting is 105
seconds.
The default setting is 500
milliseconds.
The default setting is 2500
milliseconds.
By default, neighbor tracking is
disabled.