The IP address of the Mobile Node Authenticator. The semantics for this object are defined as follows. If the value of cDot11csServiceType, cDot11csIsRootNode and this object are 'wds', 'true' and 0.0.0.0 respectively, this node is the MN Authenticator. If the values of cDot11csServiceType is 'wds' and the value of cDot11csIsRootNode is 'false' indicating that there is at least one node up in the wireless services hierarchy that offers Wireless Network Services, the value of this object is the IP address of the immediate parent node for which the value of cDot11csServiceType is 'wns'. If the values of cDot11csServiceType and this object are 'wns' and 0.0.0.0 respectively, this infrastructure node is the MN Authenticator. This object is not applicable to a root node offering WNS which is identified by a value of 'rootWns' for cDot11csServiceType.