The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcoeEstcEp:epDn managed object property", so it carries no real prose -- but the property name and its SnmpAdminString type tell you what it holds: It holds the dn of the physical port endpoint object underlying this FCoE storage uplink port, linking the logical port-channel or profile row back to the actual hardware port it rides on. Because an Ethernet uplink port carrying FCoE traffic dedicated to reaching directly-attached FCoE storage rather than a full multi-hop SAN fabric, this field is how UCS Manager ties this logical object back to one concrete piece of hardware -- so an admin following a fault or a cable pull can jump straight from this FCoE storage uplink port to the exact physical port responsible. A value here might look like sys/switch-A/fc-slot-4/fc-14, pointing at the specific physical uplink that backs this FCoE storage uplink port.