Configuring Multicast Source Registration - HP 6125G Configuration Manual

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 the 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, do not use this
method of checksum calculation.
When receivers stop receiving multicast data addressed to a certain multicast group through the RP
(which means 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.
To configure register-related parameters:
Step
1. Enter system view.
2. Enter 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.
Command
system-view
pim
register-policy acl-number
register-whole-checksum
register-suppression-timeout
interval
probe-interval interval
126
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.