tmnxOamBuildPktDot1qCtlEntry contains the definition of one IEEE 802.1Q header used by the OAM Egress Finder. Fields that influence the routing by SROS of a packet containing an IEEE 802.1Q header (e.g. VLAN ID) are present. The other IEEE 802.1Q header fields (e.g. Drop Eligible Indicator (DEI)) are absent. A row is created by SROS when: 1. tmnxOamBuildPktHdrType is set to 'dot1q', OR 2. A tmnxOamBuildPktHdrOvrCtlTable table row is created with a tmnxOamBuildPktHeaderNum index which refers to a header with type 'dot1q'. A row is destroyed by SROS when: 1. A tmnxOamBuildPktHdrCtlTable row with tmnxOamBuildPktHdrType = 'dot1q' is destroyed, OR 2. A tmnxOamBuildPktHdrOvrCtlTable row which refers to a header with type 'dot1q' is destroyed. A row created using creation clause 1, above, has the index object tmnxOamBuildPktNumOrZero=0. The zero indicates the IEEE 802.1Q 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 VLAN ID field for header 1, and two overrides. Pkt Num Or Zero Header Num VLAN ID 0 1 4092 10 1 4093 255 1 4094