164
Step
Command
Remarks
4.
Configure the maximum
delay between hello
messages.
pim triggered-hello-delay
interval
Optional.
5 seconds by default.
5.
Configure the join/prune
interval.
pim timer join-prune
interval
Optional.
60 seconds by default.
6.
Configure the join/prune
timeout timer.
pim holdtime join-prune
interval
Optional.
210 seconds by default.
7.
Configure assert timeout
timer.
pim holdtime assert
interval
Optional.
180 seconds by default.
Configuring join/prune message sizes
A large join/prune message size might result in loss of a larger amount of information if a message is
lost. You can set a small value for the size of each join/prune message to reduce the impact in case
of the loss of a message.
By controlling the maximum number of (S, G) entries in each join/prune message, you can effectively
reduce the number of (S, G) entries sent per unit of time.
To configure join/prune message sizes:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter public network PIM
view or VPN instance PIM
view.
pim
[
vpn-instance
vpn-instance-name
]
N/A
3.
Configure the maximum size
of each join/prune message.
jp-pkt-size
packet-size
Optional.
8100 bytes by default.
4.
Configure the maximum
number of (S, G) entries in
each join/prune message.
jp-queue-size
queue-size
Optional.
1020 by default.
IMPORTANT:
If PIM snooping–enabled switches are deployed in the PIM network, be sure to set a value no
greater than the path MTU for the maximum size of each join/prune message on the receiver-side
edge PIM devices.
Configuring PIM to work with BFD
PIM uses hello messages to elect a DR for a multi-access network. The elected DR is the only
multicast forwarder on the multi-access network.
If the DR fails, a new DR election process starts after the DR is aged out. However, it might take a
long period of time. To start a new DR election process immediately after the original DR fails, enable
PIM to work with Bidirectional Forwarding Detection (BFD) on a multi-access network to detect
failures of the links among PIM neighbors. You must enable PIM to work with BFD on all PIM-capable
routers on a multi-access network, so that the PIM neighbors can fast detect DR failures and start a
new DR election process.
Before you configure this feature on an interface, be sure to enable PIM-DM or PIM-SM on the
interface.
