Configure PIM-SSM

PIM-SSM is one subset of PIM-SM. In PIM-SSM, do not need RP, BSR or RPT, and there is no SPT switching, but the receiving end DR directly adds to multicast source and sets up the shortest path tree (SPT) with source as root.

Configuration Condition

Before configuring PIM-SSM, first complete the following tasks:

• Configure the network layer address of the interface, making the neighboring node network layer reachable
• Configure any unicast route protocol, making the intra-domain route reachable
• Enable the PIM-SM protocol on all interfaces that need multicast route forwarding

Configure PIM-SSM

Table 7–17 Configure PIM-SSM

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  When using PIM-SSM, the receiving end should enable IGMPv3.
• When the receiver cannot be upgraded to IGMPv3, you can use the IGMP SSM Mapping function to cooperate with PIM-SSM.
• Ensure that the SSM multicast group address ranges configured on all devices in the domain are consistent. Otherwise, it may result in the abnormality of PIM-SS.

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