16.1.15 Configuring IPv4 PIM-SSM in VRF [SL-L3A]

The settings below must be specified in global configuration mode to use IPv4 PIM-SSM for the Switches in a VRF. These settings enable IPv4 PIM-SSM to run within the specified SSM address range on the VRF interfaces for which IPv4 PIM-SM is set. The Switch can set only one SSM address for each VRF. In this example, the default (232.0.0.0/8) is used for the SSM address range for which PIM-SSM runs in VRF 10.

Because source addresses cannot be differentiated with IGMPv2 or IGMPv3 (EXCLUDE mode), linkage to the IPv4 PIM-SSM cannot be performed. With the Switches, the group address and source address for which IPv4 PIM-SSM is run can be set to link with IPv4 PIM-SSM. This functionality must be set for each VRF. The group address for which IPv4 PIM-SSM is run needs to be within the SSM address range specified for the target VRF in the IPv4 PIM-SSM address setting. As an example, the following diagram shows an example of a IPv4 PIM-SSM configuration in which VPN 2 is associated with VRF 10 and the group address used by VPN 2 is 232.10.10.1 and the source address of server 1 is 192.168.2.2 and the source address of server 2 is 192.168.3.2 when two servers are used in the same VPN.