HP MSR2003 User Manual

95
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the state refresh feature.
pim state-refresh-capable
By default, the state refresh
feature is enabled.
Configuring state refresh parameters
The router directly connected with the multicast source periodically sends state refresh messages. You can
configure the interval for sending such messages on that router.
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 before it receives next state refresh message.
If the router receives a new state refresh message within the specified waiting time, it discards the
message. If this timer times out, the router accepts a new state refresh 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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter PIM view.
pim [ vpn-instance
vpn-instance-name ]
N/A
3. Configure the interval to send state
refresh messages.
state-refresh-interval interval
The default setting is 60
seconds.
4. Configure the time to wait before
receiving a new state refresh message.
state-refresh-rate-limit time
The default setting is 30
seconds.
5. Configure the TTL value of state refresh
messages.
state-refresh-ttl ttl-value The default setting 255.
Configuring PIM-DM graft retry timer
In PIM-DM, only the graft process uses the acknowledgment mechanism. After a router sends a graft
message, it starts a graft retry timer. If the router does not receive a graft-ack message from the upstream
router when the timer expires, the router sends another graft message. The router keeps sending graft
messages until it receives a graft-ack message.
For more information about the configuration of other timers in PIM-DM, see "Configuring common PIM
timer
s."
To configure the graft retry timer:

HP MSR2003 Specifications

General

Brand	HP
Model	MSR2003
Category	Network Router
Language	English