NAS Identification
  
  
    These attributes provided by the 
RADIUS
      extension packets are used to determine the DA Controller that is to disconnect the
        session:
        -  NAS-IP-Address—This IPV4 address must match the primary IP address
          of the default interface for a match to occur. 
If all of these attributes do not match, the request is responded to with a
      Disconnect-NAK response.