3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring PIM Common Information 591
A PIM device periodically sends join/prune messages to its upstream for state
update. A join/prune message contains the join/prune timeout time. The upstream
device sets a join/prune timeout timer for each pruned downstream interface, and
resumes the forwarding state of the pruned interface when this timer times out.
When a device fails to receive subsequent multicast data from the multicast source
S, the device will not immediately deletes the corresponding (S, G) entries; instead,
it maintains (S, G) entries for a period of time, namely the multicast source
lifetime, before deleting the (S, G) entries.
Configuring PIM common timers globally
Follow these steps to configure PIM common timers globally:
Configuring PIM common timers on an interface
Follow these steps to configure PIM common timers on an interface:
n
If there are no special networking requirements, we recommend that you use the
default settings.
To do... Use the command... Remarks
Enter system view system-view -
Enter PIM view pim -
Configure the hello interval timer hello interval Optional
30 seconds by default
Configure assert timeout time holdtime assert interval Optional
180 seconds by default
Configure the join/prune
interval
timer join-prune interval Optional
60 seconds by default
Configure the join/prune
timeout time
holdtime join-prune interval Optional
210 seconds by default
Configure the multicast
source lifetime
source-lifetime interval Optional
210 seconds by default
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN/POS interface
view
interface interface-type
interface-number
-
Configure the hello interval pim timer hello interval Optional
30 seconds by default
Configure the maximum delay
between hello messages
pim triggered-hello-delay
interval
Optional
5 seconds by default
Configure assert timeout time pim holdtime assert interval Optional
180 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