vRtrPimRsvpPmsiCGrpSrcIfIndex 1.3.6.1.4.1.6527.3.1.2.50.2.12.1.11

The value of vRtrPimRsvpPmsiCGrpSrcIfIndex indicates the interface index of the RSVP S-PMSI. This value will be non-zero integer value specific to the router.