The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcSanPcEp:fltAggr managed object property", so it carries no real prose -- but the property name and its Unsigned64 type tell you what it holds: It holds an aggregated 64-bit fault code that rolls up every fault currently raised against this FC SAN port-channel member port into one bitmask. Rather than a human-readable message, this is meant for correlation: a monitoring system can compare this number against the Cisco UCS fault catalog to see, in one field, whether this specific FC SAN port-channel member port has any open faults at all before drilling into the Faults tab for the details. A value of 0 means this FC SAN port-channel member port has no outstanding faults; a nonzero value like 4398046511104 encodes one or more specific fault codes bit-packed together.