Configuring State Refresh Parameters - HP FlexNetwork 7500 Series Configuration Manual

Step
Enter system view.
1.
Enter interface view.
2.
Enable the state refresh
3.
feature.

Configuring state refresh parameters

The state refresh interval determines the interval at which a router sends state refresh messages. It
is configurable.
A router might receive duplicate state refresh messages within a short time. To prevent this situation,
you can configure the amount of time that the router must wait to accept a new state refresh
message. If the router receives a new state refresh message before the timer expires, it discards the
message. If the router receives a new state refresh message after the timer expires, it accepts the
message, refreshes its own IPv6 PIM-DM state, and resets the waiting timer.
The hop limit value of a state refresh message decrements by 1 whenever it passes a router before
it is forwarded to the downstream node. The state refresh message stops being forwarded when the
hop limit comes down to 0. A state refresh message with a large hop limit value might cycle on a
small network. To control the propagation scope of state refresh messages, configure an appropriate
hop limit value based on the network size on the router directly connected with the IPv6 multicast
source.
To configure state refresh parameters:
Step
Enter system view.
1.
Enter IPv6 PIM view.
2.
Configure the state refresh
3.
interval.
Configure the amount of time
4.
to wait before accepting a
new state refresh message.
Configure the hop limit value
5.
of state refresh messages.
Configuring IPv6 PIM-DM graft retry timer
To configure the IPv6 PIM-DM graft retry timer:
Step
Enter system view.
1.
Enter interface view.
2.
Configure the graft retry
3.
timer.
Command
system-view
interface interface-type
interface-number
ipv6 pim state-refresh-capable
Command
system-view
ipv6 pim [ vpn-instance
vpn-instance-name ]
state-refresh-interval interval
state-refresh-rate-limit time
state-refresh-hoplimit
hoplimit-value
Command
system-view
interface interface-type
interface-number
ipv6 pim timer graft-retry
interval
317
Remarks
N/A
N/A
By default, the state refresh
feature is enabled.
Remarks
N/A
N/A
The default setting is 60 seconds.
The default setting is 30 seconds.
The default setting is 255.
Remarks
N/A
N/A
By default, the graft retry timer is 3
seconds.