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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 fra
mentation is performed accordin
to the MTU of the interface that sends the BSMs.
Configuring PIM-SSM
PIM-SSM requires IGMPv3 support. Enable IGMPv3 on PIM routers that connect to multicast receivers.
PIM-SSM configuration task list
Task at a
lance
(Required.) Enabling PIM-SM
(Optional.) Configuring the SSM group range
(Optional.) Configuring common PIM features
Configuration prerequisites
Before you configure PIM-SSM, configure a unicast routing protocol so that all devices in the domain are
interoperable at the network layer.
Enabling PIM-SM
The implementation of the SSM model is based on subsets of PIM-SM. Therefore, you must enable
PIM-SM before configuring PIM-SSM.
When you deploy a PIM-SSM domain, enable PIM-SM on non-border interfaces of the routers.
IMPORTANT:
ll the interfaces on a device must be enabled with the same PIM mode.
To enable PIM-SM:
Ste
Command Remarks
1. Enter system view.
system-view N/A
2. Enable IP multicast routing,
and enter MRIB view.
multicast routing [ vpn-instance
vpn-instance-name ]
By default, IP multicast routing is
disabled.
3. Return to system view.
quit N/A
4. Enter interface view.
interface interface-type
interface-number
N/A
5. Enable PIM-SM.
pim sm By default, PIM-SM is disabled.
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