The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcSanPcEp:peerPortId managed object property", so it carries no real prose -- but the property name and its Gauge32 type tell you what it holds: It holds the port number on the far end of this FC SAN port-channel member port's connection. Paired with peerSlotId and peerChassisId (or the SAN switch identity), this is the coordinate that tells an admin exactly which port on the specific SAN switch port that this one bundled member link connects to this local link terminates on, which is what you actually need when calling the SAN team to check the other end of a cable. This FC SAN port-channel member port might report peerPortId 32, meaning it lands on port 32 on the far-end device.