routing problem in ns3 rip

李楠

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Jul 13, 2016, 11:39:03 PM7/13/16

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I create a network like this =========1----------2---------3==========

4 5 6 7 8 9 10

I set up node 1,2,3 as routers and install RIP in them.

I set up node 4~10 as hosts and install default internet stack in them.

Then, I make node 4 send upd packets to node 7,but node 7 has never received the data.

And, if I install RIP in each node, it works.

Why? Please give me some advice or hints. Thanks!

The next is my code:

#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/csma-module.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("Rip-test");

int main (int argc, char **argv)

{

LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);

LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);

CommandLine cmd;

cmd.Parse (argc, argv);

uint32_t np2p = 3;

uint32_t ncsma1 =3;

uint32_t ncsma2 =4;

NodeContainer p2pNodes;

p2pNodes.Create (np2p);

RipHelper ripRouting;

Ipv4ListRoutingHelper RHlist;

RHlist.Add (ripRouting, 1);

InternetStackHelper stack1;

stack1.SetRoutingHelper (RHlist);

stack1.Install (p2pNodes);

PointToPointHelper p2pHelper;

p2pHelper.SetDeviceAttribute ("DataRate", StringValue ("50Mbps"));

p2pHelper.SetChannelAttribute ("Delay", StringValue ("1ms"));

NetDeviceContainer p2pDevices1 = p2pHelper.Install (p2pNodes.Get(0) , p2pNodes.Get(1));

NetDeviceContainer p2pDevices2 = p2pHelper.Install (p2pNodes.Get(1) , p2pNodes.Get(2));

Ipv4AddressHelper ipv4;

ipv4.SetBase (Ipv4Address ("10.0.0.0"), Ipv4Mask ("255.255.255.0"));

Ipv4InterfaceContainer p2p1 = ipv4.Assign (p2pDevices1);

ipv4.SetBase (Ipv4Address ("10.0.1.0"), Ipv4Mask ("255.255.255.0"));

Ipv4InterfaceContainer p2p2 = ipv4.Assign (p2pDevices2);

NodeContainer csma1Nodes;

csma1Nodes.Create (ncsma1);

NodeContainer csma2Nodes;

csma2Nodes.Create (ncsma2);

InternetStackHelper stack2;

stack2.Install (csma1Nodes);

stack2.Install (csma2Nodes);

csma1Nodes.Add (p2pNodes.Get (0));

csma2Nodes.Add (p2pNodes.Get (np2p - 1));

CsmaHelper csmaHelper;

csmaHelper.SetChannelAttribute ("DataRate", StringValue ("5Mbps"));

csmaHelper.SetChannelAttribute ("Delay", TimeValue (MicroSeconds (5)));

NetDeviceContainer csma1Devices = csmaHelper.Install (csma1Nodes);

NetDeviceContainer csma2Devices = csmaHelper.Install (csma2Nodes);

ipv4.SetBase (Ipv4Address ("10.0.2.0"), Ipv4Mask ("255.255.255.0"));

Ipv4InterfaceContainer csma1 = ipv4.Assign (csma1Devices);

ipv4.SetBase (Ipv4Address ("10.0.3.0"), Ipv4Mask ("255.255.255.0"));

Ipv4InterfaceContainer csma2 = ipv4.Assign (csma2Devices);

UdpEchoServerHelper echoServer (9);

ApplicationContainer serverApps = echoServer.Install (csma1Nodes.Get (0));

serverApps.Start (Seconds (10.0));

serverApps.Stop (Seconds (500.0));

UdpEchoClientHelper echoClient (csma1.GetAddress (0), 9);

echoClient.SetAttribute ("MaxPackets", UintegerValue (500));

echoClient.SetAttribute ("Interval", TimeValue (Seconds (1)));

echoClient.SetAttribute ("PacketSize", UintegerValue (1024));

ApplicationContainer clientApps = echoClient.Install (csma2Nodes.Get (0));

clientApps.Start (Seconds (50.0));

clientApps.Stop (Seconds (500.0));

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

李楠

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Jul 14, 2016, 3:53:41 AM7/14/16

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ok.I find the answer,we should set the default route for host.

I add some codes,it works.

Ptr<Ipv4StaticRouting> staticRouting;

staticRouting = Ipv4RoutingHelper::GetRouting <Ipv4StaticRouting> (csma2Nodes.Get (0)->GetObject<Ipv4> ()->GetRoutingProtocol ());

staticRouting->SetDefaultRoute ("10.0.3.5", 1 );

staticRouting = Ipv4RoutingHelper::GetRouting <Ipv4StaticRouting> (csma1Nodes.Get (0)->GetObject<Ipv4> ()->GetRoutingProtocol ());

staticRouting->SetDefaultRoute ("10.0.2.4", 1 );

在 2016年7月14日星期四 UTC+8上午11:39:03，李楠写道：

Tommaso Pecorella

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Jul 14, 2016, 4:48:50 AM7/14/16

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Please check the rip example in "examples/routing/rip-simple-network.cc", the answer is there.

Shortly put: you forgot to install a default route in the nodes (the routers doesn't need it).

T.

李楠

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Jul 14, 2016, 7:34:00 AM7/14/16

to ns-3-users

Thanks !

在 2016年7月14日星期四 UTC+8下午4:48:50，Tommaso Pecorella写道：

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