Upon successful login this vlan will represent the one in which
user resides before authentication while upon logout this vlan will
be the one in which user resides before logout. If the user was authenticated
on multiple vlans (using the Extreme-Netlogin-Extended vlan vendor specific
attribute VSA 211) then this object represents the untagged vlan (if present) or the
tagged vlan with the lowest tag from the extremeNetloginMoveFromVlanList.