R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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NOTE:
A
bout the Hash mask len
g
th and C-BSR priority:
• You can confi
g
ure these parameters at three levels:
g
lobal confi
g
uration level,
g
lobal 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 global C-BSR parameters.”
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:
To do... Use the command... Remarks
Enter system view system-view —
Enter public instance PIM view pim —
Configure a filtering rule for
register messages
register-policy acl-number
Optional
No register filtering rule by default
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