If the state of the N-port is 'down' as depicted
by the instance of csiNportState, this objects
denotes the reason why this N-port is 'down'.
When the N-port is 'up' the value returned by
this object is 'none'.
adminDown - The user has configured the SVC interface
that contains this N-port as down.
ifSoftwareDown - Virtualization software is down.
lineCardSwDown - Line card software is down.
vsanDown - The VSAN that this N-port belongs to
(instance of csiNportVsanId), is down.
inRemovalState - The SVC interface that this N-port
belongs to, is in the process of
going down.
ifHardwareDown - The line card hardware is down.
uninitialized - Port is being initialized.