Configuring Multicast Source Registration - HP FlexFabric 5950 series Configuration Manual

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 duplicated 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
1. Enter system view.
2. Enter PIM view.
3. Disable the device from
forwarding BSMs out of
their incoming interfaces.

Configuring multicast source registration

A PIM register policy enables an RP to filter register messages by using an ACL that specifies the
multicast sources and groups. The policy limits the multicast groups to which the RP is designated. If
a register message is denied by the ACL or does not match the ACL, the RP discards the register
message and sends a register-stop message to the source-side DR. The registration process stops.
You can configure the device to calculate the checksum based on the entire register message to
ensure information integrity of a register message in the transmission process. If a device that does
not support this feature is present on the network, you can configure the device to calculate the
checksum based on the register message header.
The RP sends a register-stop message to the source-side DR in either of the following conditions:
•
The RP stops serving the receivers for a multicast group. The receivers do not receive multicast
data addressed to the multicast group through the RP.
•
The RP receives multicast data that travels along the SPT.
After receiving the register-stop message, the DR stops sending register messages encapsulated
with 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 encapsulated multicast data) to the RP
and starts a register probe timer. If the DR receives a register-stop message before the register
probe timer expires, it resets its register-stop timer. Otherwise, the DR starts sending register
messages with encapsulated data again.
The register-stop timer is set to a random value chosen uniformly from (0.5 ×
register_suppression_time minus register_probe_time) to (1.5 × register_suppression_time minus
register_probe_time). The register_probe_time is fixed to 5 seconds.
On all C-RP routers, perform the following tasks:
•
Configure a PIM register policy.
•
Configure the routers to calculate the checksum based on the entire register messages or the
register message header.
On all routers that might become the source-side DR, configure the register suppression time.
To configure multicast source registration:
Command
system-view
pim
[ vpn-instance vpn-instance-name ]
undo bsm-reflection enable
136
Remarks
N/A
N/A
By default, the device forwards
BSMs out of their incoming
interfaces.