The desired administrative state of this virtual interface.
When the status of this object is set to 'disabled', the
virtual link is torn down and no routing information is
exchanged with its peer.
When the status of this object is set to 'enabled', the
virtual link is established (if possible) and routing
information is shared with its peer. The
etsysOspfExtVirtIfOperStatus object provides the status of
this connection.