R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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In view of information integrity of register messages in the transmission process, you can configure the
device to calculate the checksum based on the entire register messages. However, to reduce the
workload of encapsulating data in register messages and for the sake of interoperability, do not use this
checksum calculation method.
When receivers stop receiving multicast data addressed to a certain multicast group through the RP (that
is, the RP stops serving the receivers of that multicast group), or when the RP starts receiving multicast
data from the multicast source along the SPT, the RP sends a register-stop message to the source-side DR.
After receiving this message, the DR stops sending register messages encapsulated with 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 will reset 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 all 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 all routers that might become source-side DRs.
On the HSR6800 router, only the first register message carries multicast data.
To configure register-related parameters:
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. Configure a filtering rule for
register messages.
register-policy acl-number
Optional.
No register filtering rule by default.
4. Configure the device to
calculate the checksum based
on the entire register
messages.
register-whole-checksum
Optional.
By default, the checksum is
calculated based on the header of
register messages.
5. Configure the register
suppression time.
register-suppression-timeout
interval
Optional.
60 seconds by default.
6. Configure the register probe
time.
probe-interval interval
Optional.
5 seconds by default.
Configuring switchover to SPT
Perform the following configuration on routers that might become receiver-side DRs and on C-RP routers.
To configure SPT switchover:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A