Configuring Spt Switchover - HP A8800 Configuration Manual

register messages with IPv6 multicast data encapsulated from the IPv6 multicast source along SPT, the RP
sends a register-stop message to the source-side DR. Upon receiving this message, the DR stops sending
register messages encapsulated with IPv6 multicast data and starts a register-stop timer. Before the
register-stop timer expires, the DR sends a null register message (a register message without
encapsulated multicast data) to the RP. If the DR receives a register-stop message during the register
probe time, it resets its register-stop timer. Otherwise, the DR starts sending register messages with
encapsulated data again when the register-stop timer expires.
The Register-Stop Timer is set to a random value chosen uniformly from the interval (0.5 times
register_suppression_time, 1.5 times register_suppression_time) minus register_probe_time.
Configure a filtering rule for register messages on C-RP routers and configure them to calculate the
checksum based on the entire register messages. Configure the register suppression time and the register
probe time on routers that may become IPv6 source-side DRs.
To configure register-related parameters:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
3. Configure a filtering rule for
register messages.
4. Configure the device to
calculate the checksum based
on the entire register
messages.
5. Configure the register
suppression time.
6. Configure the register probe
time.

Configuring SPT switchover

CAUTION:
If the router is an RP, disabling switchover to SPT might cause multicast traffic forwarding failures on the
source-side DR. When disabling switchover to SPT, be sure you fully understand its impact on your network.
Because an RPT is possibly not the tree that has the shortest path, the IPv6 multicast forwarding path
needs to be switched from the RPT to the SPT when the IPv6 multicast traffic is large. By default, the device
switches to the SPT immediately after it receives the first IPv6 multicast packet from the RPT.
Perform the following configuration on routers that may become receiver-side DRs.
To configure the device not to initiate an RPT-to-SPT switchover:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
Command
system-view
pim ipv6
register-policy acl6-number
register-whole-checksum
register-suppression-timeout
interval
probe-interval interval
Command
system-view
pim ipv6
401
Remarks
N/A
N/A
Optional.
No register filtering rule by default.
Optional.
Based on the header of register
messages by default.
Optional.
60 seconds by default.
Optional.
5 seconds by default.
Remarks
N/A
N/A