The real DESCRIPTION field here is just the auto-generated stub "Cisco UCS fabric:FcVsanPortEp:warnings managed object property", so it carries no real prose -- but the property name and its CucsFabricWarnings type tell you what it holds: It holds a bitmask of active warning conditions UCS Manager currently has flagged against this VSAN port endpoint. Unlike operState, which is a single up/down summary, this field can report several simultaneous non-fatal warnings on this VSAN port endpoint at once -- for example a marginal signal along with a policy mismatch -- so an admin scanning this column can catch degraded-but-still-passing-traffic conditions before they turn into an outage. Right now this might read "none" for this particular VSAN port endpoint, versus "none" once the underlying condition clears.