Configuring Multicast Source Registration - HP A5500 SI Switch Series Configuration Manual

To do...
Configure a C-BSR for the
global-scope zone
NOTE:
The following points apply to the hash mask length and C-BSR priority:
You can configure these parameters at 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 the filtering rule denies an (S, G)
entry, or if the filtering rule does not define an action for this entry, 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, HP does not
recommend this method of checksum calculation.
When receivers stop receiving multicast data addressed to a certain multicast group through the RP—the
RP stops serving the receivers of that multicast group, or when the RP formally starts receiving register
messages with multicast data encapsulated from the multicast source, 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. 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 might become source-side DRs.
Follow these steps to configure register-related parameters:
To do...
Enter system view
Use the command...
c-bsr global [ hash-length hash-
length | priority priority ] *
"Configuring global C-BSR
Use the command...
system-view
141
Remarks
Required
No C-BSRs are configured for
the global-scope zone by
default.
parameters."
Remarks
—