The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcVsanPortEp:autoNegotiate managed object property", so it carries no real prose -- but the property name and its TruthValue type tell you what it holds: It holds whether speed and duplex auto-negotiation is turned on for this VSAN port endpoint's link. When this is true, this VSAN port endpoint and the SAN switch port on the other end of that VSAN link negotiate their operating speed automatically on link-up; when false, an admin has pinned the speed manually, which is often required for older FC gear that does not negotiate reliably above a certain rate. This typically reads "true" on a modern 16G/32G FC uplink and might be forced to "false" if this VSAN port endpoint needs to be locked to a specific legacy speed.