anchor.diff:            "IgnoreCarrierLoss"
             "Xfrm"
             "KeepConfiguration"
  +          "BatmanAdvanced"
           ])
           # Note: For DHCP the values both, none, v4, v6 are deprecated
           (assertValueOneOf "DHCP" ["yes" "no" "ipv4" "ipv6"])
  
positive.code:       '';
      };
  
    };
  
    addressOptions = {
  
negative.code:           "fou"
            "xfrm"
            "ifb"
            "batadv"
          ])
          (assertByteFormat "MTUBytes")
          (assertMacAddress "MACAddress")
  