H3C Technologies H3C S12500 Series Switches - Manual (Page 409)

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Configuring IPv6 multicast source registration
Within an IPv6 PIM-SM domain, the source-side DR sends register messages to the RP, and these register
messages have different IPv6 multicast source or IPv6 multicast group addresses. You can configure a
filtering rule to filter register messages so that the RP can provide services for specific IPv6 multicast
groups. If the filtering rule denies an (S, G) entry, or 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 IPv6
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, H3C
recommends not using this method of checksum calculation.
When receivers stop receiving data addressed to a certain IPv6 multicast group through the RP
(indicating that the RP stops providing services for the receivers of that IPv6 multicast group), or when the
RP starts receiving IPv6 multicast data from the IPv6 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 IPv6 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 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 IPv6 source-side DRs.
To configure register-related parameters:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IPv6 PIM view. pim ipv6 N/A
3. Configure a filtering rule for
register messages.
register-policy acl6-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.
Based on the header of register
messages by default.
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.