How to Implement mpls protocol in OMNeT++
To implement the MPLS (Multiprotocol Label Switching) protocol in OMNeT++ has many steps like understanding MPLS, setting up the environment, generating MPLS modules, integrating them with the INET framework, and testing. Here’s a detailed guide to help you implement MPLS in OMNeT++ using the INET framework:
Step-by-Step implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Download and install the latest version of OMNeT++ from the OMNeT++
- Install INET Framework: Download and install the INET framework from the INET repository.
Step 2: Understand MPLS Protocol
Instead of long network addresses, depends on the short path labels MPLS directs data from one node to the next because it is a routing technique. Key components include:
- Label Distribution Protocol (LDP): Spread labels that map to network routes.
- Label Switching Router (LSR): Depends on the labels, it routes the packets.
- Label Edge Router (LER): Adds or removes labels from packets.
Step 3: Create MPLS Protocol Modules
Define the Modules in .ned Files
Build a .ned files for the MPLS protocol modules: MPLS, LDP, LSR, and LER.
MPLS.ned
simple MPLS
{
parameters:
double helloInterval @unit(s) = default(1s);
gates:
input fromNetworkLayer;
output toNetworkLayer;
input fromMacLayer;
output toMacLayer;
}
LDP.ned
simple LDP
{
parameters:
double ldpInterval @unit(s) = default(5s);
gates:
input fromMPLS;
output toMPLS;
}
LSR.ned
simple LSR
{
parameters:
double processingDelay @unit(s) = default(0.001s);
gates:
input fromLDP;
output toLDP;
input fromMPLS;
output toMPLS;
}
LER.ned
simple LER
{
parameters:
double processingDelay @unit(s) = default(0.001s);
gates:
input fromLDP;
output toLDP;
input fromMPLS;
output toMPLS;
}
Implement the Modules in C++
Create the corresponding .cc and .h files for all module.
MPLS.h
#ifndef __MPLS_H_
#define __MPLS_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/common/L3AddressResolver.h”
#include “inet/networklayer/ipv4/IPv4Datagram.h”
#include <map>
using namespace omnetpp;
using namespace inet;
class MPLS : public cSimpleModule
{
private:
double helloInterval;
IRoutingTable *routingTable;
cMessage *helloMsg;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void sendHello();
void processHello(cMessage *msg);
public:
MPLS();
virtual ~MPLS();
};
#endif
MPLS.cc
#include “MPLS.h”
Define_Module(MPLS);
MPLS::MPLS()
{
helloMsg = nullptr;
}
MPLS::~MPLS()
{
cancelAndDelete(helloMsg);
}
void MPLS::initialize()
{
helloInterval = par(“helloInterval”);
routingTable = getModuleFromPar<IRoutingTable>(par(“routingTableModule”), this);
helloMsg = new cMessage(“sendHello”);
scheduleAt(simTime() + helloInterval, helloMsg);
}
void MPLS::handleMessage(cMessage *msg)
{
if (msg == helloMsg)
{
sendHello();
scheduleAt(simTime() + helloInterval, helloMsg);
}
else if (strcmp(msg->getName(), “Hello”) == 0)
{
processHello(msg);
}
else
{
// Handle other messages
}
}
void MPLS::sendHello()
{
cMessage *hello = new cMessage(“Hello”);
send(hello, “toNetworkLayer”);
}
void MPLS::processHello(cMessage *msg)
{
// Implement processing of Hello message
delete msg;
}
LDP.h
#ifndef __LDP_H_
#define __LDP_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
using namespace omnetpp;
using namespace inet;
class LDP : public cSimpleModule
{
private:
double ldpInterval;
cMessage *ldpMsg;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
public:
LDP();
virtual ~LDP();
};
#endif
LDP.cc
#include “LDP.h”
Define_Module(LDP);
LDP::LDP()
{
ldpMsg = nullptr;
}
LDP::~LDP()
{
cancelAndDelete(ldpMsg);
}
void LDP::initialize()
{
ldpInterval = par(“ldpInterval”);
ldpMsg = new cMessage(“LDP”);
scheduleAt(simTime() + ldpInterval, ldpMsg);
}
void LDP::handleMessage(cMessage *msg)
{
if (msg == ldpMsg)
{
// Implement LDP functionality
scheduleAt(simTime() + ldpInterval, ldpMsg);
}
else
{
// Handle other messages
}
}
LSR.h
#ifndef __LSR_H_
#define __LSR_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
using namespace omnetpp;
using namespace inet;
class LSR : public cSimpleModule
{
private:
double processingDelay;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
public:
LSR();
virtual ~LSR();
};
#endif
LSR.cc
#include “LSR.h”
Define_Module(LSR);
LSR::LSR()
{
}
LSR::~LSR()
{
}
void LSR::initialize()
{
processingDelay = par(“processingDelay”);
}
void LSR::handleMessage(cMessage *msg)
{
// Implement LSR functionality
sendDelayed(msg, processingDelay, “toMPLS”);
}
LER.h
#ifndef __LER_H_
#define __LER_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
using namespace omnetpp;
using namespace inet;
class LER : public cSimpleModule
{
private:
double processingDelay;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
public:
LER();
virtual ~LER();
};
#endif
LER.cc
#include “LER.h”
Define_Module(LER);
LER::LER()
{
}
LER::~LER()
{
}
void LER::initialize()
{
processingDelay = par(“processingDelay”);
}
void LER::handleMessage(cMessage *msg)
{
// Implement LER functionality
sendDelayed(msg, processingDelay, “toMPLS”);
}
Step 4: Integrate with Simulation Model
Integrate the MPLS modules inside the network simulation model.
Network Configuration .ned File
network MPLSNetwork
{
submodules:
router1: StandardHost {
parameters:
@display(“p=100,100”);
}
router2: StandardHost {
parameters:
@display(“p=300,100”);
}
// Add more routers as needed
connections:
router1.pppg++ <–> { @display(“m=100,100”); } <–> router2.pppg++;
}
omnetpp.ini Configuration
network = MPLSNetwork
*.router*.pppg[*].queue.typename = “DropTailQueue”
*.router*.ipv4.routingTable = “inet.networklayer.routing.manet.Router”
*.router*.networkLayer.networkProtocol.typename = “IPv4NetworkLayer”
*.router*.transportLayer.tcp.typename = “Tcp”
*.router*.transportLayer.udp.typename = “Udp”
*.router*.application[*].typename = “UdpBasicApp”
*.router*.application[*].destAddresses = “router1” // Set destination as needed
*.router*.application[*].destPort = 2000
*.router*.application[*].startTime = uniform(0s, 10s)
*.router*.application[*].sendInterval = uniform(1s, 2s)
*.router*.application[*].packetLength = 512B
*.router*.app[0].typename = “MPLS”
Step 5: Test and Debug
- Run Simulations: Examine the behavior of MPLS modules in multiple network conditions by executing the simulations.
- Analyze Results: Verify the correctness and performance of the implementation.
- Debugging: Use OMNeT++’s debugging tools to troubleshoot any issues.
In this procedure, we covered the basic set ups and implementation of MPLS protocol and installation of INET framework in the OMNeT++ and explain them using samples. If you need any extra details of MPLS protocol, we will offer it.
We work on simulation and validate the implementation of mpls protocol in OMNeT++ program so get our developers guidance we provide you novel project ideas with best results.