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Configuring PIM-SSM
PIM-SSM requires IGMPv3 support. Enable IGMPv3 on PIM routers that connect to multicast
receivers.
PIM-SSM configuration task list
Tasks at a glance
(Required.)
Configuring the SSM group range
Configuring common PIM features
Configuration prerequisites
Before you configure PIM-SSM, configure a unicast routing protocol so that all devices in the domain
can interoperate at the network layer.
Enabling PIM-SM
Before you configure PIM-SSM, you must enable PIM-SM, because the implementation of the SSM
model is based on subsets of PIM-SM.
When you deploy a PIM-SSM domain, enable PIM-SM on non-border interfaces of the routers.
IMPORTANT:
All the interfaces on a device must be enabled with the same PIM mode.
To enable PIM-SM:
Step
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.
Configuring the SSM group range
When a PIM-SM enabled interface receives a multicast packet, it checks whether the multicast group
address of the packet is in the SSM group range. If the multicast group address is in this range, the
PIM mode for this packet is PIM-SSM. If the multicast group address is not in this range, the PIM
mode is PIM-SM.
Configuration restrictions and guidelines
When you configure the SSM group range, follow these restrictions and guidelines: