Ns3 TapBridge Error Device does not support SendFrom

[c127...@mydit.ie]

Hi guys,

So I have a PC with two network card installed. Each of them are connected to PC's(cross-over cable). I was told to connect both PC's using a simulated network (NS-3) by using tap-bridge. Diagram below to make it clear:

PC(Server) -------- (PC to run NS-3 Simulation) --------- PC(Client)

I have started playing with tap-bridge UseLocal configuration but I have no success on it. I modified first.cc as my starting point and attached the tap-bridge helper configurations on the nodes.

So I created a tap0 and tap1 from the instructions https://www.nsnam.org/docs/release/3.9/doxygen/group___tap_bridge_model.html

 *   sudo tunctl -t tap0
 *   sudo ifconfig tap0 hw ether 00:10:4b:ad:91:b8  
 *   sudo ifconfig tap0 192.168.1.1 netmask 255.255.255.0 up
 *   sudo tunctl -t tap1
 *   sudo ifconfig tap1 hw ether 00:50:da:b2:e4:75    
 *   sudo ifconfig tap0 192.168.1.2 netmask 255.255.255.0 up

So now I modified first.cc to:

#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/internet-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/applications-module.h"
#include "ns3/tap-bridge-module.h"
using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("FirstScriptExample");

int
main (int argc, char *argv[])
{
  Time::SetResolution (Time::NS);
  LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);
  LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);

  NodeContainer nodes;
  nodes.Create (2);

  PointToPointHelper pointToPoint;
  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer devices;
  devices = pointToPoint.Install (nodes);

  InternetStackHelper stack;
  stack.Install (nodes);

  Ipv4AddressHelper address;
  address.SetBase ("10.1.1.0", "255.255.255.0");

  Ipv4InterfaceContainer interfaces = address.Assign (devices);

  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));
  serverApps.Start (Seconds (1.0));
  serverApps.Stop (Seconds (10.0)); 
  // Use the TapBridgeHelper to connect to the pre-configured tap devices for
  // the left side.  We go with "UseBridge" mode since the CSMA devices support
  // promiscuous mode and can therefore make it appear that the bridge is
  // extended into ns-3.  The install method essentially bridges the specified
  // tap to the specified CSMA device.
  //
  TapBridgeHelper tapBridge;
  tapBridge.SetAttribute ("Mode", StringValue ("UseLocal"));
  tapBridge.SetAttribute ("DeviceName", StringValue ("tap0"));
  tapBridge.Install (nodes.Get (1), devices.Get (1));

  UdpEchoClientHelper echoClient (interfaces.GetAddress (1), 9);
  echoClient.SetAttribute ("MaxPackets", UintegerValue (1));
  echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.0)));
  echoClient.SetAttribute ("PacketSize", UintegerValue (1024));

  ApplicationContainer clientApps = echoClient.Install (nodes.Get (0));
  clientApps.Start (Seconds (2.0));
  clientApps.Stop (Seconds (10.0));
  // Connect the right side tap to the right side CSMA device on the right-side
  // ghost node.
  //
  tapBridge.SetAttribute ("DeviceName", StringValue ("tap1"));
  tapBridge.Install (nodes.Get (0), devices.Get (0));

  Simulator::Run ();
  Simulator::Destroy ();
  return 0;
}
Am I going the wrong way here ? I have little knowledge of both NS-3 and Linux so I am a bit confused here. Any help would be appreciated.
I have approached using lxc containers and had no issues except I couldnt install an Apache server on one of the containers.

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[Tommaso Pecorella]

Hi,

would you use a Corvette repair manual to fix a Dodge ?

I doubt so. They're both cars, they both have 4 weeks and an engine, but that's it.

You're using the instructions for ns-3.9, and I doubt you're using that version.

My suggestions are:

1) use the latest ns-3. Either ns-3.22 or ns-3-dev.

2) use the manual for the installed version

3) use FdNetDevice.

Cheers,

T.

PS: also... 4) use an appropriate message topic.