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 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 PIM-DM state, and resets the waiting timer.
The TTL 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 TTL
value comes down to 0. A state refresh message with a large TTL value might cycle on a small
network. To effectively control the propagation scope of state refresh messages, configure an
appropriate TTL value based on the network size on the router directly connected with the multicast
source.
To configure state refresh parameters:
Step
Enter system view.
1.
Enter PIM view.
2.
Configure the state refresh interval.
3.
Configure the amount of time to wait
4.
before accepting a new state
refresh message.
Configure the TTL value of state
5.
refresh messages.
Configuring PIM-DM graft retry timer
To configure the 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
pim state-refresh-capable
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
state-refresh-interval interval
state-refresh-rate-limit time
state-refresh-ttl ttl-value
Command
system-view
interface interface-type
interface-number
pim timer graft-retry interval
109
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 255.
Remarks
N/A
N/A
The default setting is 3 seconds.