HP 6125XLG R2306-HP 6125XLG Blade Switch IP Multicast Configuration Guide - Page 88

Configuring common PIM timers globally, Configuring common PIM timers on an interface

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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 are effective on all interfaces. The configurations made in interface view are effective on only 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 Step 1. Enter system view. 2. Enter PIM view. 3. Set the interval to send hello messages. Command system-view pim timer hello interval 4. Set the interval to send join/prune messages. timer join-prune interval 5. Set the joined/pruned state holdtime timer. 6. Set the multicast source lifetime. holdtime join-prune time source-lifetime time Remarks N/A N/A By default, the interval to send hello messages is 30 seconds. By default, the interval to send join/prune messages is 60 seconds. By default, the joined/pruned state holdtime timer is 210 seconds. By default, the multicast source lifetime is 210 seconds. Configuring common PIM timers on an interface Step 1. Enter system view. 2. Enter interface view. 3. Set the interval to send hello messages. Command system-view interface interface-type interface-number pim timer hello interval 4. Set the maximum delay for sending hello messages. pim triggered-hello-delay delay 5. Set the interval to send join/prune messages. pim timer join-prune interval Remarks N/A N/A By default, the interval to send hello messages is 30 seconds. By default, the maximum delay for sending hello messages is 5 seconds. By default, the interval to send join/prune messages is 60 seconds. 81

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81
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 are effective on all interfaces. The configurations made in interface view are effective on only 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
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter PIM view.
pim
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.
6.
Set the multicast source
lifetime.
source-lifetime
time
By default, the multicast source
lifetime is 210 seconds.
Configuring common PIM timers on an interface
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Set the interval to send hello
messages.
pim timer hello
interval
By default, the interval to send
hello messages is 30 seconds.
4.
Set the maximum delay for
sending hello messages.
pim triggered-hello-delay
delay
By default, the maximum delay for
sending hello messages is 5
seconds.
5.
Set the interval to send
join/prune messages.
pim timer join-prune
interval
By default, the interval to send
join/prune messages is 60
seconds.