tmnxOamBuildPktTcpUdpCtlEntry contains the definition of one TCP|UDP header used by the OAM Egress Finder. Fields that influence the routing by SROS of a packet containing a TCP|UDP header (e.g. Source Port) are present. The other TCP|UDP header fields (e.g. Checksum) are absent. A row is created by SROS when: 1. tmnxOamBuildPktHdrType is set to 'tcp'|'udp', OR 2. A tmnxOamBuildPktHdrOvrCtlTable table row is created with a tmnxOamBuildPktHeaderNum index which refers to a header with type 'tcp'|'udp'. A row is destroyed by SROS when: 1. A tmnxOamBuildPktHdrCtlTable row with tmnxOamBuildPktHdrType = 'tcp'|'udp' is destroyed, OR 2. A tmnxOamBuildPktHdrOvrCtlTable row which refers to a header with type 'tcp'|'udp' is destroyed. A row created using creation clause 1, above, has the index object tmnxOamBuildPktNumOrZero=0. The zero indicates the TCP|UDP 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 Source Port field for header 1, and two overrides. Pkt Num Or Zero Header Num Source Port 0 1 65532 10 1 65533 255 1 65534