H3C Technologies H3C S10500 Series Switches - Manual (Page 190)

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To do... Use the command... Remarks
Configure the maximum delay
between hello messages
pim triggered-hello-delay interval
Optional
5 seconds by default
Configure the join/prune interval pim timer join-prune interval
Optional
60 seconds by default
Configure the join/prune timeout
time
pim holdtime join-prune interval
Optional
210 seconds by default
Configure assert timeout time pim holdtime assert interval
Optional
180 seconds by default
NOTE:
If no special networking requirements are raised, use the default settings.
Configuring join/prune message sizes
A larger join/prune message size will result in loss of a larger amount of information if a message is lost;
with a reduced join/message size, the loss of a single message has a relatively minor impact.
By controlling the maximum number of (S, G) entries in a join/prune message, you can effectively reduce
the number of (S, G) entries sent per unit of time.
Follow these steps to configure join/prune message sizes:
To do... Use the command... Remarks
Enter system view system-view —
Enter public network PIM view or
VPN instance PIM view pim [ vpn-instance
vpn-instance-name ]
—
Configure the maximum size of a
join/prune message
jp-pkt-size packet-size
Optional
8,100 bytes by default.
Configure the maximum number of
(S, G) entries in a join/prune
message
jp-queue-size queue-size
Optional
1,020 by default.
CAUTION:
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 a 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 will be the only multicast
forwarder on the multi-access network.
If the DR fails, a new DR election process will start 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