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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 for all interfaces in IPv6 PIM view or for the current
interface in interface view. The configuration made in interface view takes priority over the
configurations made in IPv6 PIM view.
Configuring hello message options globally
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IPv6 PIM view.
ipv6 pim
[
vpn-instance
vpn-instance-name
]
N/A
3.
Set the DR priority.
hello-option dr-priority priority
The default setting is 1.
4.
Set the neighbor lifetime.
hello-option holdtime time
The default setting is 105
seconds.
5.
Set the IPv6 PIM message
propagation delay for a
shared-media LAN.
hello-option lan-delay delay
The default setting is 500
milliseconds.
6.
Set the override interval.
hello-option
override-interval interval
The default setting is 2500
milliseconds.
7.
Enable neighbor tracking.
hello-option neighbor-tracking
By default, neighbor tracking is
disabled.
Configuring hello message options on an interface
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface interface-type
interface-number
N/A
3.
Set the DR priority.
ipv6 pim hello-option
dr-priority priority
The default setting is 1.
4.
Set the neighbor lifetime.
ipv6 pim hello-option
holdtime time
The default setting is 105
seconds.
5.
Set the IPv6 PIM message
propagation delay.
ipv6 pim hello-option
lan-delay delay
The default setting is 500
milliseconds.
6.
Set the override interval.
ipv6 pim hello-option
override-interval interval
The default setting is 2500
milliseconds.
7.
Enable neighbor tracking.
ipv6 pim hello-option
neighbor-tracking
By default, neighbor tracking is
disabled.
8.
Enable dropping hello
messages without the
Generation ID option.
ipv6 pim require-genid
By default, an interface accepts
hello messages without the
Generation ID option.
Configuring common IPv6 PIM timers
IMPORTANT:
To prevent the upstream neighbors from aging out, you must configure the interval for sending
