anchor.diff:        "DHCPServer"
         "LinkLocalAddressing"
         "IPv4LLRoute"
  +      "DefaultRouteOnDevice"
         "IPv6Token"
         "LLMNR"
         "MulticastDNS"
  
positive.code: 
    checkVxlan = checkUnitConfig "VXLAN" [
      (assertOnlyFields [
        "Id"
        "Remote"
        "Local"
        "TOS"
        "TTL"
        "MacLearning"
  
negative.code:       "TxChannels"
        "OtherChannels"
        "CombinedChannels"
        "RxBufferSize"
        "TxBufferSize"
      ])
      (assertValueOneOf "MACAddressPolicy" ["persistent" "random" "none"])
      (assertMacAddress "MACAddress")
  