HP MSR2000/3000/4000 Router Series IP Multicast Configuration Guide

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Ste
p
Command Remarks
5. Set the prune delay.
pim hello-option lan-delay delay
By default, the prune delay is 500
milliseconds.
6. Set the override interval.
pim hello-option override-interval
interval
By default, the override interval is
2500 milliseconds.
7. Enable the neighbor tracking
function.
pim hello-option neighbor-tracking
By default, the neighbor tracking
function is disabled.
8. Enable dropping hello
messages without the
Generation ID option.
pim require-genid
By default, an interface accepts
hello messages without the
Generation ID option.
Configuring common PIM timers
PIM routers periodically send hello messages to discover PIM neighbors, and maintain PIM neighbor
relationship.
After receiving a hello message, a PIM router waits for a random time period before sending a hello
message. This random time period is smaller than the maximum delay for sending hello messages, and
it can avoid collisions that might occur when multiple PIM routers send hello messages simultaneously.
A PIM router periodically sends join/prune messages to its upstream routers for state update. A
join/prune message contains the joined/pruned state holdtime value, and an upstream router uses this
value to set a holdtime timer for the joined state or pruned state of the downstream interfaces.
When a router fails to receive subsequent multicast data from the multicast source S, the router does not
immediately remove the corresponding (S, G) entry. Instead, it maintains the (S, G) entry for a period of
time (known as, the multicast source lifetime) before deleting the (S, G) entry.
You can configure common PIM timers in PIM view or interface view. The configurations made in PIM
view take effect on all interfaces. The configurations made in interface view take effect only on the current
interface. If you configure common PIM timers in both PIM view and interface view, the configuration in
interface view always takes precedence.
TIP:
For a network without special requirements, HP recommends using the defaults.
Configuring common PIM timers globally
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. Set the interval to send hello
messages.
timer hello interval
By default, the interval to send
hello messages is 30 seconds.
4. Set the interval to send
join/prune messages.
timer join-prune interval
By default, the interval to send
join/prune messages is 60
seconds.
5. Set the joined/pruned state
holdtime timer.
holdtime join-prune time
By default, the joined/pruned state
holdtime timer is 210 seconds.