The value of vRtrPimLdpPmsiCGrpSrcState indicates the state of this PMSI (S,G). If the S-PMSI is bound to a (C-S,G) on the ingress PE and if the PE is allocating a Ldp PMSI, the state will be 'txJoinPending'. The state will change to 'txJoined' when the (C-S,G) traffic is switched over to the new S-PMSI. If the S-PMSI is not bound to a (C-S,G) on the egress PE, the state will be 'rxNotJoined'. The state will be 'rxJoined' if the (C-S,G) has bound to the S-PMSI. Egress PE state will be 'rxJoinedTracking' if it receives SPMSI-AD with no tunnel information.