3Com Switch 8800 Advanced Software V5 Configuration Guide

590 CHAPTER 42: PIM CONFIGURATION
Configuring hello options on an interface
Follow these steps to configure hello options for an interface:
Configuring PIM
Common Timers
PIM devices discover PIM neighbors and maintain PIM neighboring relationships
with other devices by periodically sending out hello messages.
Upon receiving a hello message, a PIM device waits a random period, which is
equal to or smaller than the maximum delay between hello messages, before
sending out a hello message. This avoids collisions that occur when multiple 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 multicast forwarding.
Enter PIM view pim -
Configure the priority for DR
election
hello-option dr-priority
priority
Optional
1 by default
Configure PIM neighbor
timeout time
hello-option holdtime
interval
Optional
105 seconds by default
Configure the prune delay
time (LAN-delay)
hello-option lan-delay
interval
Optional
500 milliseconds by default
Configure the prune override
interval
hello-option
override-interval interval
Optional
2,500 milliseconds by default
Disable join suppression hello-option
neighbor-tracking
Optional
Enabled 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 priority for DR
election
pim hello-option dr-priority
priority
Optional
1 by default
Configure PIM neighbor
timeout time
pim hello-option holdtime
interval
Optional
105 seconds by default
Configure the prune delay
time (LAN-delay)
pim hello-option lan-delay
interval
Optional
500 milliseconds by default
Configure the prune override
interval
pim hello-option
override-interval interval
Optional
2,500 milliseconds by default
Disable join suppression pim hello-option
neighbor-tracking
Optional
Enabled by default
Configure the interface to
reject hello messages without
a generation ID
pim require-genid Optional
By default, hello messages
without Generation_ID are
accepted.
To do... Use the command... Remarks