R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

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• Generation ID—A router generates a generation ID for hello messages when an interface is
enabled with PIM. The generation ID is a random value, but only changes when the status of the
router changes. If an PIM router finds that the generation ID in a hello message from the upstream
router has changed, it assumes that the status of the upstream router has changed. In this case, it
sends a join message to the upstream router for status update. You can configure an interface to
drop hello messages without the generation ID options to promptly know the status of an upstream
router.
Configuring hello options globally
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter public network PIM view
or VPN instance PIM view.
pim [ vpn-instance
vpn-instance-name ]
N/A
3. Set the DR priority.
hello-option dr-priority priority
Optional.
1 by default.
4. Set the neighbor lifetime. hello-option holdtime interval
Optional.
105 seconds by default.
5. Set the prune message delay.
hello-option lan-delay interval
Optional.
500 milliseconds by default.
6. Set the override interval.
hello-option override-interval
interval
Optional.
2500 milliseconds by default.
7. Enable the neighbor tracking
function.
hello-option neighbor-tracking Disabled by default.
Configuring hello options on an interface
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Set the DR priority.
pim hello-option dr-priority priority
Optional.
1 by default.
4. Set the neighbor lifetime.
pim hello-option holdtime interval
Optional.
105 seconds by default.
5. Set the prune message delay.
pim hello-option lan-delay interval
Optional.
500 milliseconds by default.
6. Set the override interval.
pim hello-option override-interval
interval
Optional.
2500 milliseconds by default.
7. Enable the neighbor tracking
function.
pim hello-option neighbor-tracking Disabled by default.
8. Enable dropping hello
messages without the
Generation ID option.
pim require-genid
By default, an interface accepts
hello message without the
Generation ID option.