This enumerated value (CucsFabricUdldOperState) reports whether UDLD (Unidirectional Link Detection) is currently active and its result on this member port of the FCoE SAN port-channel. UDLD exists to catch a link that appears up electrically but is actually only passing traffic in one direction; an admin watches this field on this member port of the FCoE SAN port-channel because a UDLD-detected fault here is exactly the kind of problem that plain link-state monitoring would miss and that causes intermittent, hard-to-diagnose connectivity issues. A value of 'bidirectional' means the link checks out fine; 'unidirectional' or 'indeterminate' on this member port of the FCoE SAN port-channel would flag the specific unidirectional-link condition UDLD is designed to catch.