How to Start BGP Protocol Projects Using NS3

To start a BGP (Border Gateway Protocol) project using NS3, we want being mindful which NS3 does not directly support built-in BGP disparate RIP. But, we can estimate the BGP by utilising external BGP libraries or by replicating BGP-like behavior via custom routing sets up in NS3.

Following is a common method for initiating a BGP-like project in NS3:

Steps to Start BGP Protocol Projects in NS3

  1. Install NS3

We adhere to following steps to configure it, if doesn’t install NS3 on the system.

# Update the system and install necessary packages

sudo apt update

sudo apt install -y gcc g++ python3 python3-dev cmake libgsl-dev libsqlite3-dev

# Clone the NS-3 repository

git clone https://gitlab.com/nsnam/ns-3-dev.git ns-3

cd ns-3

# Configure and build NS-3

./ns3 configure –enable-examples –enable-tests

./ns3 build

  1. Simulate BGP-Like Behavior with Static Routes

While NS3 doesn’t directly support BGP, we can be mimicked BGP routing by setting up static routes or custom routing rules, making a simple inter-domain routing environment. On the other hand, we can integrate NS3 include a BGP-capable software router such as Quagga or BIRD.

Below is a simple approach to use static routing:

  1. Create a Script: In the NS3’s scratch folder, we make a file bgp_simulation.cc.
  2. Setup Network Topology and Static Routes: Describe the AS (Autonomous Systems) and to replicate the BGP-like inter-AS interaction, we can set static routing.

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/ipv4-static-routing-helper.h”

#include “ns3/point-to-point-module.h”

using namespace ns3;

int main(int argc, char *argv[]) {

LogComponentEnable(“BGPExample”, LOG_LEVEL_INFO);

// Create nodes, representing routers in different ASes

NodeContainer as1Nodes, as2Nodes;

as1Nodes.Create(2); // AS 1 routers

as2Nodes.Create(2); // AS 2 routers

// Create links between routers in different ASes

PointToPointHelper pointToPoint;

pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“1Gbps”));

pointToPoint.SetChannelAttribute(“Delay”, StringValue(“10ms”));

// Install link between AS1 and AS2

NetDeviceContainer devicesAS1AS2 = pointToPoint.Install(as1Nodes.Get(1), as2Nodes.Get(0));

// Install the Internet stack

InternetStackHelper internet;

internet.Install(as1Nodes);

internet.Install(as2Nodes);

// Assign IP addresses

Ipv4AddressHelper ipv4;

ipv4.SetBase(“10.1.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfacesAS1 = ipv4.Assign(pointToPoint.Install(as1Nodes.Get(0), as1Nodes.Get(1)));

ipv4.SetBase(“10.2.1.0”, “255.255.255.0”);

Ipv4InterfaceContainer interfacesAS2 = ipv4.Assign(pointToPoint.Install(as2Nodes.Get(0), as2Nodes.Get(1)));

ipv4.SetBase(“192.168.1.0”, “255.255.255.0”);

ipv4.Assign(devicesAS1AS2);

// Enable static routing to simulate BGP

Ipv4StaticRoutingHelper staticRoutingHelper;

Ptr<Ipv4> ipv4as1 = as1Nodes.Get(0)->GetObject<Ipv4>();

Ptr<Ipv4StaticRouting> staticRoutingAS1 = staticRoutingHelper.GetStaticRouting(ipv4as1);

staticRoutingAS1->AddNetworkRouteTo(Ipv4Address(“192.168.1.0”), Ipv4Mask(“255.255.255.0”), Ipv4Address(“10.1.1.2”), 1);

Ptr<Ipv4> ipv4as2 = as2Nodes.Get(1)->GetObject<Ipv4>();

Ptr<Ipv4StaticRouting> staticRoutingAS2 = staticRoutingHelper.GetStaticRouting(ipv4as2);

staticRoutingAS2->AddNetworkRouteTo(Ipv4Address(“10.1.1.0”), Ipv4Mask(“255.255.255.0”), Ipv4Address(“192.168.1.1”), 1);

Simulator::Stop(Seconds(10.0));

Simulator::Run();

Simulator::Destroy();

return 0;

}

In this instance, each AS is denoted through a set of nodes associated with static routes to replicate the BGP. We can be prolonged this configuration with several ASes and more complex routing paths.

  1. Build and Run the Simulation
  1. In the scratch directory of NS3, we need to save bgp_simulation.cc.
  2. Go to the terminal, pass through to the NS3 directory and construct the script:

./ns3 build

  1. Run the simulation:

./ns3 run scratch/bgp_simulation

  1. Implement External BGP with Quagga or BIRD (Optional)

We deliberate to combine NS3 including a software-based BGP router like Quagga or BIRD to attain full BGP functionality. We can be executed Quagga on virtual machines (VMs) or containers and to utilise an interface like Direct Code Execution (DCE) or via an external network bridge, connect NS3 nodes to these routers.

  1. Analyze Results

Make use of logging, monitoring the packet flows and routing decisions. For instance, allow packet logging to follow routes over AS boundaries and then examine routing table sets up:

LogComponentEnable(“Ipv4StaticRouting”, LOG_LEVEL_INFO);

LogComponentEnable(“BGPExample”, LOG_LEVEL_INFO);

Through this manual, we know how to execute and simulate the BGP Protocol projects by using the NS3 simulation tool. We will plan to extend the information how BGP Protocol performs in other simulation tool.

If you want to do really well in your projects, let our team help you out. Contact us for more information. At phdprojects.org, we focus on BGP Protocol Projects using the NS3 tool, giving students personalized and top-notch documentation. Our team knows how to mimic BGP-like behavior with custom routing results and detailed explanations. You can count on us for affordable prices, and we promise to deliver high-quality work on time, done by our skilled experts.