The value of tmnxSubAuthPlcyNasPortTypeValue specifies
what value will be put in the RADIUS NAS-Port-Type attribute
if included in RADIUS authentication-request messages.
This field is only applicable if the 'nasPortType' bit
is set in tmnxSubAuthPlcyInclAttributes
and the value of the object tmnxSubAuthPlcyNasPortTypeType is equal to
'config'.