Configuring Ipv6 Multicast Source Registration - HP 5920 series Configuration Manual

If the RP-set information for an IPv6 multicast group range is carried in one BSMF, a non-BSR router
•
directly updates the RP-set information for the group range after receiving the BSMF.
If the RP-set information for an IPv6 multicast group range is carried in multiple BSMFs, a non-BSR
•
router updates the RP-set information for the group range after receiving all these BSMFs. Because
the RP-set information contained in each segment is different, loss of some IP fragments does not
result in dropping of the entire BSM.
The BSM semantic fragmentation function is enabled by default. A device that does not support this
function might regard a fragment as a BSM and thus learns only part of the RP-set information. Therefore,
if such devices exist in the IPv6 PIM-SM domain, you must disable the BSM semantic fragmentation
function on the C-BSRs.
To disable the BSM semantic fragmentation function:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
3. Disable the BSM semantic
fragmentation function.
NOTE:
Generally, a BSR performs BSM semantic fragmentation according to the MTU of its BSR interface.
However, for BSMs originated due to learning of a new IPv6 PIM neighbor, semantic fragmentation is
performed according to the MTU of the interface that sends the BSMs.

Configuring IPv6 multicast source registration

In 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 serve specific IPv6 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
sends a register-stop message to the DR to stop the registration process for the IPv6 multicast data.
In view of information integrity of a register message in the transmission process, you can configure the
device to calculate the checksum based on the entire register message. However, to reduce the workload
of encapsulating data in register messages and for the sake of interoperability, do not use this checksum
calculation method.
To configure IPv6 multicast source registration:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
3. Configure a filtering rule for
register messages.
4. Configure the device to
calculate the checksum based
on the entire register
message.
Command
system-view
ipv6 pim
undo bsm-fragment enable
Command
system-view
ipv6 pim
register-policy acl6-number
register-whole-checksum
152
Remarks
N/A
N/A
By default, BSM semantic
fragmentation is enabled.
Remarks
N/A
N/A
By default, no register filtering rule
exists.
By default, the device calculates
the checksum based on the header
of a register message.