Configuring Multicast Source Registration - H3C LS-3100-52P-OVS-H3 Operation Manual

To do...
Configure a C-BSR for the
global-scope zone
About the Hash mask length and C-BSR priority:
You can configure these parameters at three levels: global configuration level, global scope zone
level, and admin-scope zone level.
The value of these parameters configured at the global scope zone level or admin-scope zone level
have preference over the global values.
If you do not configure these parameters at the global scope zone level or admin-scope zone level,
the corresponding global values will be used.
For configuration of global C-BSR parameters, see

Configuring Multicast Source Registration

Within a PIM-SM domain, the source-side DR sends register messages to the RP, and these register
messages have different multicast source or group addresses. You can configure a filtering rule to filter
register messages so that the RP can serve specific multicast groups. If an (S, G) entry is denied by the
filtering rule, or the action for this entry is not defined in the filtering rule, the RP will send a register-stop
message to the DR to stop the registration process for the multicast data.
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, this method of
checksum calculation is not recommended.
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 formally starts
receiving multicast data from the multicast source, the RP sends a register-stop message to the
source-side DR. Upon receiving this message, the DR stops sending register messages encapsulated
with multicast data and starts a register-stop timer. When 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 may become source-side DRs.
Follow these steps to configure register-related parameters:
Use the command...
c-bsr global [ hash-length
hash-length | priority priority ] *
Configuring global C-BSR
1-26
Remarks
Required
No C-BSRs are configured for
the global-scope zone by
default
parameters.