NS3搭建网络拓扑图

//
// Network topology
//
//  n0
//     \ p-p
//      \          (shared csma/cd)      p-p
//       n2 -------------------------n3--------n7
//      /            |        | 
//     / p-p        n4--n8    n5 ---------- n6
//   n1                              p-p
//
// - CBR/UDP flows from n0 to n6
// - Tracing of queues and packet receptions to file "mixed-global-routing.tr"

#include <iostream>
#include <fstream>
#include <string>
#include <cassert>

#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/csma-module.h"
#include "ns3/applications-module.h"
#include "ns3/internet-module.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("MixedGlobalRoutingExample");

int 
main (int argc, char *argv[])
{
  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210));
  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("448kb/s"));

  // All