tmnxOamBuildPktMplsCtlEntry contains the definition of one MPLS header used by the OAM Egress Finder. Fields that influence the routing by SROS of a packet containing an MPLS header (e.g. MPLS Label) are present. The other MPLS header fields (e.g. Bottom of Stack) are absent. A row is created by SROS when: 1. tmnxOamBuildPktHdrType is set to 'mpls', OR 2. A tmnxOamBuildPktHdrOvrCtlTable table row is created with a tmnxOamBuildPktHeaderNum index which refers to a header with type 'mpls'. A row is destroyed by SROS when: 1. A tmnxOamBuildPktHdrCtlTable row with tmnxOamBuildPktHdrType = 'mpls' is destroyed, OR 2. A tmnxOamBuildPktHdrOvrCtlTable row which refers to a header with type 'mpls' is destroyed. A row created using creation clause 1, above, has the index object tmnxOamBuildPktNumOrZero=0. The zero indicates the MPLS header is a base definition (not an override). A row created using creation clause 2, above, has tmnxOamBuildPktNumOrZero set to the tmnxOamBuildPktNum index of the parent tmnxOamBuildPktHdrOvrCtlTable row. The following example values for this table show the definition of a base MPLS Label field for header 1, and two overrides. Pkt Num Or Zero Header Num MPLS Label 0 1 1048573 10 1 1048574 255 1 1048575