Configuring Pim-Ssm - HPE FlexNetwork 5510 HI Series Configuration Manual

Configure a PIM domain
3.
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 BIDIR-SM domain contains a device that does not support this feature, you must disable this
feature on all C-BSRs. If you do not disable this feature, such a device regards a BSMF as a 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
Enter system view.
1.
Enter PIM view.
2.
Disable BSM semantic
3.
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 PIM neighbor, semantic fragmentation
is performed according to the MTU of the interface that sends the BSMs.
Disabling the device from forwarding BSMs out of their incoming interfaces
By default, the device forwards BSMs out of their incoming interfaces to avoid the situation that some
devices cannot receive the BSMs because of inconsistent routing information. This results in
duplicated traffic. To reduce traffic, you can disable the device from forwarding BSMs out of their
incoming interfaces if all the devices have consistent routing information.
To disable the device from forwarding BSMs out of their incoming interfaces:
Step
Enter system view.
1.
Enter PIM view.
2.
Disable the device from
3.
forwarding BSMs out of their
incoming interfaces.

Configuring PIM-SSM

PIM-SSM requires IGMPv3 support. Enable IGMPv3 on PIM routers that connect to multicast
receivers.
pim bsr-boundary
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
undo bsm-fragment enable
Command
system-view
pim [ vpn-instance
vpn-instance-name ]
undo bsm-reflection enable
130
By default, an interface is not a
PIM domain border.
Remarks
N/A
N/A
By default, BSM semantic
fragmentation is enabled.
Remarks
N/A
N/A
By default, the device forwards
BSMs out of their incoming
interfaces.