| Alexander Afanasyev | 4d32516 | 2012-06-01 12:28:50 -0700 | [diff] [blame^] | 1 | Examples |
| 2 | ======== |
| 3 | |
| 4 | Simple scenario |
| 5 | --------------- |
| 6 | |
| 7 | The first example (``ccnx-simple.cc``) shows very basics of ndnSIM. In the simulated |
| 8 | topology there are 3 nodes, connected with point-to-point links, one |
| 9 | NDN consumer, and one NDN producer:: |
| 10 | |
| 11 | +----------+ 1Mbps +--------+ 1Mbps +----------+ |
| 12 | | consumer | <------------> | router | <------------> | producer | |
| 13 | +----------+ 10ms +--------+ 10ms +----------+ |
| 14 | |
| 15 | Consumer requests data from producer with frequency 10 interests per second |
| 16 | (interests contain constantly increasing sequence number). |
| 17 | |
| 18 | For every received interest, producer replies with a data packet, containing |
| 19 | 1024 bytes of virtual payload. |
| 20 | |
| 21 | The following code represents all that is necessary to run such a |
| 22 | simple scenario |
| 23 | |
| 24 | .. code-block:: c++ |
| 25 | |
| 26 | #include "ns3/core-module.h" |
| 27 | #include "ns3/network-module.h" |
| 28 | #include "ns3/point-to-point-module.h" |
| 29 | #include "ns3/ndnSIM-module.h" |
| 30 | |
| 31 | using namespace ns3; |
| 32 | |
| 33 | int |
| 34 | main (int argc, char *argv[]) |
| 35 | { |
| 36 | // setting default parameters for PointToPoint links and channels |
| 37 | Config::SetDefault ("ns3::PointToPointNetDevice::DataRate", StringValue ("1Mbps")); |
| 38 | Config::SetDefault ("ns3::PointToPointChannel::Delay", StringValue ("10ms")); |
| 39 | Config::SetDefault ("ns3::DropTailQueue::MaxPackets", StringValue ("20")); |
| 40 | |
| 41 | // Creating nodes |
| 42 | NodeContainer nodes; |
| 43 | nodes.Create (3); |
| 44 | |
| 45 | // Connecting nodes using two links |
| 46 | PointToPointHelper p2p; |
| 47 | p2p.Install (nodes.Get (0), nodes.Get (1)); |
| 48 | p2p.Install (nodes.Get (1), nodes.Get (2)); |
| 49 | |
| 50 | // Install CCNx stack on all nodes |
| 51 | CcnxStackHelper ccnxHelper; |
| 52 | ccnxHelper.SetDefaultRoutes (true); |
| 53 | ccnxHelper.InstallAll (); |
| 54 | |
| 55 | // Installing applications |
| 56 | |
| 57 | // Consumer |
| 58 | CcnxAppHelper consumerHelper ("ns3::CcnxConsumerCbr"); |
| 59 | // Consumer will request /prefix/0, /prefix/1, ... |
| 60 | consumerHelper.SetPrefix ("/prefix"); |
| 61 | consumerHelper.SetAttribute ("Frequency", StringValue ("10")); // 10 interests a second |
| 62 | consumerHelper.Install (nodes.Get (0)); // first node |
| 63 | |
| 64 | // Producer |
| 65 | CcnxAppHelper producerHelper ("ns3::CcnxProducer"); |
| 66 | // Producer will reply to all requests starting with /prefix |
| 67 | producerHelper.SetPrefix ("/prefix"); |
| 68 | producerHelper.SetAttribute ("PayloadSize", StringValue("1024")); |
| 69 | producerHelper.Install (nodes.Get (2)); // last node |
| 70 | |
| 71 | Simulator::Stop (Seconds (20.0)); |
| 72 | |
| 73 | Simulator::Run (); |
| 74 | Simulator::Destroy (); |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | If NS-3 is compiled in debug mode, you can run and see progress of the |
| 80 | simulation using the following command:: |
| 81 | |
| 82 | NS_LOG=CcnxConsumer:CcnxProducer ./waf --run=ccnx-simple |