R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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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.
When a router fails to receive subsequent IPv6 multicast data from the IPv6 multicast source S, the router
does not immediately remove the corresponding (S, G) entry. Instead, it maintains the (S, G) entry for a
period of time (namely, the IPv6 multicast source lifetime) before deleting the (S, G) entry.
You can configure common IPv6 PIM timers in IPv6 PIM view or interface view. The configurations made
in IPv6 PIM view are effective on all interfaces and the configurations made in interface view are effective
on only the current interface. If you configure hello message options in both IPv6 PIM view and interface
view, the configuration in interface view always takes precedence.
TIP:
For a network without special requirements, HP recommends using the defaults.
Configuring common IPv6 PIM timers globally
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enter IPv6 PIM view.
ipv6 pim N/A
3. Set the interval to send hello
messages.
timer hello interval
By default, the interval to send
hello messages is 30 seconds.
4. Set the interval to send
join/prune messages.
timer join-prune interval
By default, the interval to send
join/prune messages is 60
seconds.
5. Set the joined/pruned state
holdtime timer.
holdtime join-prune time
By default, the joined/pruned state
holdtime timer is 210 seconds.
6. Set the IPv6 multicast source
lifetime.
source-lifetime time
By default, the IPv6 multicast
source lifetime is 210 seconds.
Configuring common IPv6 PIM timers 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 interval to send hello
messages.
ipv6 pim timer hello interval
By default, the interval to send
hello messages is 30 seconds.
4. Set the maximum delay for
sending hello messages.
ipv6 pim triggered-hello-delay
delay
By default, the maximum delay for
sending hello messages is 5
seconds.