H3C Technologies H3C S12500-X Series Switches - Manual (Page 179)

169
Step Command Remarks
5. Set the prune message delay. hello-option lan-delay delay
By default, the prune message
delay is 500 milliseconds.
6. Set the override interval.
hello-option override-interval
interval By default, the override interval is
2500 milliseconds.
7. Enable the neighbor tracking
function.
hello-option neighbor-tracking
By default, the neighbor tracking
function is disabled.
Configuring hello message options on an interface
Step 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.
ipv6 pim hello-option dr-priority
priority
By default, the DR priority is 1.
4. Set the neighbor lifetime.
ipv6 pim hello-option holdtime
time By default, the neighbor lifetime is
105 seconds.
5. Set the prune delay.
ipv6 pim hello-option lan-delay
delay By default, the prune delay is 500
milliseconds.
6. Set the override interval.
ipv6 pim hello-option
override-interval interval By default, the override interval is
2500 milliseconds.
7. Enable the neighbor tracking
function.
ipv6 pim hello-option
neighbor-tracking By default, the neighbor tracking
function is disabled.
8. Enable dropping hello
messages without the
Generation ID option. ipv6 pim require-genid
By default, an interface accepts
hello message without the
Generation ID option.
Configuring common IPv6 PIM timers
CAUTION:
To prevent the upstream neighbors from aging out, you must configure the interval for sending join/prune
message less than the joined/pruned state holdtime timer.
IPv6 PIM routers periodically send hello messages to discover IPv6 PIM neighbors, and maintain IPv6
PIM neighbor relationship.
After receiving a hello message, an IPv6 PIM router waits for a random time period before sending a
hello message. This random time period is smaller than the maximum delay for sending hello messages,
and it can avoids collisions that might occur when multiple IPv6 PIM routers send hello messages
simultaneously.
An IPv6 PIM router periodically sends join/prune messages to its upstream routers for state update. A
join/prune message contains the joined/pruned state timeout value, and an upstream router uses this
value to set a timeout timer for the joined state or pruned state of the downstream interfaces.