The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcoeSanEp:chassisId 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 chassis identifier associated with this FCoE SAN uplink port itself, mirroring peerChassisId but describing the local rather than the far side of the link. Since an Ethernet uplink port on the fabric interconnect that carries FCoE traffic to an upstream FCoE-capable SAN switch (an FCF), this FCoE SAN uplink port normally does not sit behind a chassis IOM at all, so this field typically reports 0 here just like its peer counterpart -- it exists on this object mainly because the class inherits a common set of physical-location fields shared with chassis-facing port objects elsewhere in the same MIB. Expect this to read 0 for a normal fabric-interconnect-hosted FCoE SAN uplink port, since it is not itself chassis-mounted hardware.