HP 4800G Series Configuration Manual page 849

upstream router has changed, it assumes that the status of the upstream neighbor is lost or the
upstream neighbor has changed. In this case, it triggers a join message for state update.
If you disable join suppression (namely, enable neighbor tracking), the join suppression feature should
be disabled on all PIM routers on a multi-access subnet; otherwise, the upstream router will fail to
explicitly track which downstream routers are joined to it.
Configuring hello options globally
Follow these steps to configure hello options globally:
To do...
Enter system view
Enter PIM view
Configure the priority for DR
election
Configure PIM neighbor
timeout time
Configure the prune delay time
(LAN-delay)
Configure the prune override
interval
Disable join suppression
Configuring hello options on an interface
Follow these steps to configure hello options on an interface:
To do...
Enter system view
Enter interface view
Configure the priority for DR
election
Configure PIM neighbor
timeout time
Configure the prune delay time
(LAN-delay)
Configure the prune override
interval
Disable join suppression
Configure the interface to reject
hello messages without a
generation ID
Use the command...
system-view
pim
hello-option dr-priority
priority
hello-option holdtime interval
hello-option lan-delay interval
hello-option override-interval
interval
hello-option
neighbor-tracking
Use the command...
system-view
interface interface-type
interface-number
pim hello-option dr-priority
priority
pim hello-option holdtime
interval
pim hello-option lan-delay
interval
pim hello-option
override-interval interval
pim hello-option
neighbor-tracking
pim require-genid
1-33
Remarks
—
—
Optional
1 by default
Optional
105 seconds by default
Optional
500 milliseconds by default
Optional
2,500 milliseconds by default
Required
Enabled by default
Remarks
—
—
Optional
1 by default
Optional
105 seconds by default
Optional
500 milliseconds by default
Optional
2,500 milliseconds by default
Required
Enabled by default
Required
By default, hello messages
without Generation_ID are
accepted