3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring IPv6 PIM Common Information 695
sending out a hello message. This avoids collisions that occur when multiple IPv6
PIM devices send hello messages simultaneously.
Any device that has lost assert election will prune its downstream interface and
maintain the assert state for a period of time. When the assert state times out, the
assert losers will resume IPv6 multicast forwarding.
An IPv6 PIM device periodically sends join/prune messages to its upstream device
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 IPv6 multicast data from the IPv6
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 IPv6
multicast source lifetime, before delete the (S, G) entries.
Configuring IPv6 PIM common timers globally
Follow these steps to configure IPv6 PIM common timers globally:
Configuring IPv6 PIM common timers on an interface
Follow these steps to configure IPv6 PIM common timers on an interface:
To do... Use the command... Remarks
Enter system view system-view -
Enter IPv6 PIM view pim ipv6 -
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 IPv6 multicast
source lifetime
source-lifetime interval Optional
210 seconds by default
To do... Use the command... Remarks
Enter system view system-view -
Enter VLAN interface view interface interface-type
interface-number
-
Configure the hello interval pim ipv6 timer hello interval Optional
30 seconds by default
Configure the maximum delay
between hello messages
pim ipv6
triggered-hello-delay
interval
Optional
5 seconds by default
Configure assert timeout time pim ipv6 holdtime assert
interval
Optional
180 seconds by default