Configuring Spt Switchover - HP A8800 Configuration Manual

probe time, it restarts 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 source-side DRs.
To configure register-related parameters:
Step
1. Enter system view.
2. Enter public network PIM view
or VPN instance 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 multicast forwarding path needs to
be switched from the RPT to the SPT. By default, the device switches to the SPT immediately after it receives
the first multicast packet from the RPT.
Perform the following configuration on routers that may become receiver-side DRs.
To configure the device not to switch from the RPT to the SPT:
Step
1. Enter system view.
Enter public network PIM view
2.
or VPN instance PIM view.
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
register-policy acl-number
register-header-checksum
register-suppression-timeout
interval
probe-interval interval
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
140
Remarks
N/A
N/A
Optional.
No register filtering rule by default.
Optional.
By default, the checksum is
calculated based on the header of
register messages.
Optional.
60 seconds by default.
Optional.
5 seconds by default.
Remarks
N/A
N/A