The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcoeSanEp:fcoeStateReason managed object property", so it carries no real prose -- but the property name and its SnmpAdminString type tell you what it holds: It holds a short reason code explaining why fcoeState on this FCoE SAN uplink port is currently what it is. When the FCoE session on this FCoE SAN uplink port fails to come up even though the Ethernet link itself looks fine, this is where UCS Manager records the specific cause -- such as a failed FIP login or missing FCoE VLAN -- that an admin would otherwise have to dig for in the fault log. A value here might read something like "fip-login-failed", pointing straight at the FCoE-specific problem on this FCoE SAN uplink port rather than a generic link fault.