private static void V4Request() { var V4Message = new DhcpV4Message(IPAddress.Any, new IPEndPoint(IPAddress.Parse("192.168.61.48"), DhcpConstants.V4_SERVER_PORT)); V4Message.SetOp((short)DhcpConstants.V4_OP_REQUEST); //V4_OP_REQUEST V4Message.SetGiAddr(IPAddress.Any); V4Message.SetChAddr(PhysicalAddress.Parse("9C-EB-E8-28-92-D4").GetAddressBytes()); DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption(); msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_REQUEST); V4Message.PutDhcpOption(msgTypeOption); V4Message.PutDhcpOption(new DhcpV4RequestedIpAddressOption( new v4RequestedIpAddressOption() { code = DhcpConstants.V4OPTION_REQUESTED_IP, ipAddress = "192.168.61.140" })); V4Message.SetDhcpV4ServerIdOption( new DhcpV4ServerIdOption( new v4ServerIdOption() { code = DhcpConstants.V4OPTION_SERVERID, ipAddress = "192.168.61.48" })); var message = DhcpV4MessageHandler.HandleMessage( IPAddress.Parse("192.168.61.48"), V4Message); Console.WriteLine(message.ToString()); }