two pc ns3 node communication problem

[Harry Q]

Hi all, I'm trying to use fdnetdevice to enable ns3 nodes in two computers to communicate with each other. I have referred to ARP request the IP of other subnet (google.com)  According to this post, I can ping the node in ns3 with fdnetdevice from a real pc.  However, the following issues occurred:
Only FD devices in the NS3 of the two hosts can communicate with each other (192.168.1.3 → 192.168.1.5), but PPP devices in the NS3 of the two hosts cannot communicate with each other (10.1.1.1 → 10.1.2.2). Our network configuration and source code are shown in the following.

NodeContainer p2pNodes;

   p2pNodes.Create (2);

  PointToPointHelper pointToPoint;

  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer p2pDevices;

  p2pDevices = pointToPoint.Install (p2pNodes);

  NodeContainer fdNodes;

  fdNodes.Add (p2pNodes.Get (0));

   p2pDevices.Get(1)->SetAttribute("Address", localMac);

   p2pDevices.Get(0)->SetAttribute("Address", PcenterMac);

   NS_LOG_INFO("Create Device");

   EmuFdNetDeviceHelper emu;

   emu.SetDeviceName(fddeviceName);

   NetDeviceContainer devices = emu.Install(fdNodes);

   Ptr<NetDevice> device = devices.Get(0);

   device->SetAttribute("Address", fdcenterMac);

  OlsrHelper olsr;

  Ipv4StaticRoutingHelper staticRouting;

  Ipv4ListRoutingHelper list;

  list.Add (staticRouting, 0);

  list.Add (olsr, 10);  

   NS_LOG_INFO("Add Internet Stack");

   InternetStackHelper internetStackHelper;

   internetStackHelper.SetIpv4StackInstall(true);

   internetStackHelper.Install(p2pNodes);

   Ipv4AddressHelper address;

   address.SetBase ("10.1.1.0", "255.255.255.0");

   Ipv4InterfaceContainer p2pInterfaces;

   p2pInterfaces = address.Assign (p2pDevices);

   address.SetBase ("192.168.1.0", "255.255.255.0","0.0.0.3");

   Ipv4InterfaceContainer fdInterfaces;

   fdInterfaces = address.Assign (device);

   AddressValue remoteAddress(InetSocketAddress(remoteIp, sinkPort));//10.1.2.2:9000

   OnOffHelper onoff("ns3::UdpSocketFactory", Address());

   onoff.SetAttribute("Remote", remoteAddress);

   onoff.SetAttribute("OnTime", StringValue("ns3::ConstantRandomVariable[Constant=1]"));

   onoff.SetAttribute("OffTime", StringValue("ns3::ConstantRandomVariable[Constant=0]"));

   onoff.SetAttribute("DataRate", DataRateValue(dataRate));

   onoff.SetAttribute("UnchangePacketSize", UintegerValue(packetSize));

   ApplicationContainer clientApps = onoff.Install(p2pNodes.Get(1));

[igs...@gmail.com]

What about the Gateway IP address that you configured in the emulated devices?

Charles Pandian,

[Harry Q]

Hello Charles, thanks for your replay. As shown in the code, I only set the IP and subnet mask for the network devices in ns3, as I have no idea how to set the gateway for them, so I did not set them up. I’m new to ns3. I would be very happy if you could tell me how to set up a gateway in ns3.

[Charles Pandian]

Check the official example fd-emu-ping.cc.
......
main(int argc, char* argv[])
{
    NS_LOG_INFO("Ping Emulation Example");

    std::string deviceName("eth0");
    std::string remote("8.8.8.8");
    std::string localAddress("1.2.3.4");
    std::string localGateway("1.2.3.4");
#ifdef HAVE_PACKET_H
.....

Set it according to your network configuration.

Charles Pandian,

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[Harry Q]

Hi Charles, thanks for your key suggestions. TCP communication between 10.1.1.1 and 10.1.2.2 is now possible. 

My gateway configuration is as follows:

The left fd node setting is (gw: 192.168.1.255, interface: 192.168.1.3) and the right fd node setting is (gw: 192.168.1.255, interface: 192.168.1.5)

[Charles Pandian]

Hello Harry,

Happy to know that you resolved the issue.
Thanks for sharing it. That information will be very helpful to others.

Charles Pandian,

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