cpimExtCRPTable
The (conceptual) table listing the IP multicast groups for which the local router is to advertise itself as a Candidate-RP when the value of cPimComponentCRPHoldTime is non-zero. If this table is empty, then the local router will advertise itself as a Candidate-RP for all groups (providing the value of cPimComponentCRPHoldTime is non- zero).
This OID is also declared by other modules:
CISCO-IETF-PIM-EXT-MIB