tMirrorDestinationSdpOperEgrSvcLabel 1.3.6.1.4.1.6527.3.1.2.18.1.1.1.21

If there is an active sdp being used by this service, tMirrorDestinationSdpOperEgrSvcLabel maintains the operational label being used by the SDP. If the SDP is being used, a value of '0' means the SDP transport is inactive.