HP MSR1002-4 Configuration Manual page 363

Configuring an IPv6 PIM domain border
An IPv6 PIM domain border determines the transmission boundary of bootstrap messages.
Bootstrap messages cannot cross the domain border in either direction. A number of PIM domain
border interfaces partition a network into different IPv6 BIDIR-PIM domains.
To configure an IPv6 PIM domain border:
Step
1. Enter system view.
2. Enter interface view.
3. Configure
domain border.
Disabling BSM semantic fragmentation
BSM semantic fragmentation enables a BSR to split a BSM into multiple BSM fragments (BSMFs) if
the BSM exceeds the MTU. In this way, a non-BSR router can update the RP-set information for a
group range after receiving all BSMFs for the group range. The loss of one BSMF only affects the
RP-set information of the group ranges that the fragment contains.
If the IPv6 BIDIR-PIM domain contains a device that does not support this feature, you must disable
BSM semantic fragmentation on all C-BSRs. If you do not disable this feature, such a device regards
a BSMF as an entire BSM and updates the RP-set information each time it receives a BSMF. It
learns only part of the RP-set information, which further affects the RP election.
To disable BSM semantic fragmentation:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
3. Disable
fragmentation.
NOTE:
Generally, a BSR performs BSM semantic fragmentation according to the MTU of its BSR interface.
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.
Disabling BSM forwarding out of incoming interfaces
By default, the device is enabled to forward BSMs out of incoming interfaces. This feature avoids
devices in the IPv6 PIM-SM domain might from failing to receive BSMs due to inconsistent routing
information. to reduce traffic, you can disable this feature if all the devices have consistent routing
information.
To disable the device from sending BSMs out of incoming interfaces:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
Command
system-view
interface
interface-number
an IPv6 PIM
ipv6 pim bsr-boundary
Command
system-view
ipv6
vpn-instance-name ]
BSM semantic
undo bsm-fragment enable
Command
system-view
ipv6
vpn-instance-name ]
interface-type
pim [ vpn-instance
pim [ vpn-instance
354
Remarks
N/A
N/A
By default, an interface is not an
IPv6 PIM domain border.
Remarks
N/A
N/A
By default, BSM
fragmentation is enabled.
Remarks
N/A
N/A
semantic