Specifies whether client may roam across ports under
web authentication control. Setting this attribute
'enabled'allows authenticated clients to roam to other
ports under web authentication control (that also have
this attribute set to 'enabled') without requiring a
re-authentication.
Setting this attribute 'disabled' disallows authenticated
clients from roaming to other ports (regardless of that
port's attribute value). The client has to re-
authenticate, if it attempts to roam.