How to implement eigrp protocol in ns2

To implement the Enhanced Interior Gateway Routing Protocol (EIGRP) in Network Simulator 2 (ns2), we have to thoroughly understand the protocol, including expertise in C++ and TCL. This protocol is also called Cisco Proprietary protocol and ns3 can’t support it. So, we have to execute it or incorporate an existing implementation manually. Below is a step-by-step guide on how to implement EIGRP using ns2:

Step-by-Step Implementation:

  1. Understand EIGRP Protocol
  • EIGRP is an advanced distance-vector routing protocol that integrates technologies from both distance-vector and link-state protocols. Key components include:
    • Fast convergence with the use of DUAL (Diffusing Update Algorithm).
    • Care for Classless Inter-Domain Routing (CIDR).
    • Efficient use of bandwidth with bounded updates.
  1. Set Up NS2 Environment
  • Make certain that ns2 is properly installed and configured. NS2 is an elder network simulator, so configurations may require particular dependencies. You can download NS2 from NS2 official sources.
  1. Create or Integrate EIGRP Implementation
  • NS2 does not have EIGRP by default. So, we have two options to follow such as:
    1. Create a New EIGRP Protocol: Write your own execution from scratch.
    2. Integrate an Existing EIGRP Implementation: If existed, incorporate a third-party EIGRP implementation for NS2.

Option 1: Create a New EIGRP Protocol

  • Step 1: Create Protocol Files
    • State the EIGRP protocol logic by generating new C++ files (eigrp.cc and eigrp.h).
    • Construct eigrp_packet.h to explain the packet structures used by EIGRP.
  • Step 2: Modify NS2 Core Files
    • Encompass the new EIGRP protocol files by altering the Makefile.in and Makefile.
    • Attach the help for EIGRP packets by apprising the ns-2.xx/common/packet.h and ns-2.xx/common/packet.cc.
  • Step 3: Implement Protocol Logic
    • Implement the core logic for EIGRP, containing:
      • Neighbor discovery and maintenance.
      • Consistent transport of EIGRP messages.
      • Diffusing Update Algorithm (DUAL) for loop-free routing.
      • Topology table management.
      • Route selection process.
  • Step 4: Update TCL Interface
    • Adjust ns-2.xx/tcl/lib/ns-lib.tcl to attach TCL bindings for EIGRP, permitting it to be consumed in simulation scripts.

Option 2: Integrate Existing Implementation

  • If an existing EIGRP implementation for NS2 is accessible, follow the offered commands to incorporate it with NS2 installation. It is usually copying the files to the proper directories and altering Makefile.in and Makefile.
  1. Compile NS2
  • After generating or combining the EIGRP protocol, recompile NS2:

cd ns-allinone-2.xx/ns-2.xx/

make clean

make

  1. Create TCL Script for EIGRP Simulation
  • Utilize the EIGRP as the routing protocol by writing a TCL script that sets up a network. Below is a sample template:

# Define the number of nodes

set val(nn)           10

set val(x)            500

set val(y)            500

set val(stop)         10.0

# Initialize the simulator

set ns [new Simulator]

set tracefile [open out.tr w]

$ns trace-all $tracefile

# Define the network nodes

for {set i 0} {$i < $val(nn)} {incr i} {

set node_($i) [$ns node]

$node_($i) random-motion 0

}

# Setup EIGRP Routing Protocol

$ns node-config -adhocRouting EIGRP \

-llType LL \

-macType Mac/802_11 \

-ifqType Queue/DropTail/PriQueue \

-ifqLen 50 \

-antType Antenna/OmniAntenna \

-propType Propagation/TwoRayGround \

-phyType Phy/WirelessPhy \

-topoInstance $topo \

-agentTrace ON \

-routerTrace ON \

-macTrace OFF \

-movementTrace OFF

# Define traffic in the network

set udp [new Agent/UDP]

set null [new Agent/Null]

$ns attach-agent $node_(0) $udp

$ns attach-agent $node_(1) $null

set cbr [new Application/Traffic/CBR]

$cbr set packetSize_ 1000

$cbr set interval_ 0.005

$cbr attach-agent $udp

$ns connect $udp $null

$ns at 0.1 “$cbr start”

# Set node positions (optional)

$node_(0) set X_ 0.0

$node_(0) set Y_ 0.0

$node_(0) set Z_ 0.0

$node_(1) set X_ 100.0

$node_(1) set Y_ 0.0

$node_(1) set Z_ 0.0

# Run the simulation

$ns at $val(stop) “stop”

$ns run

  1. Run the Simulation
  • Save the TCL script (e.g., eigrp_example.tcl) and execute it using NS2:

ns eigrp_example.tcl

  1. Analyze the Results
  • Assess the performance of the EIGRP protocol by evaluating the ns2’s trace file. You can use tools like AWK or Perl scripts for thorough analysis.
  1. Visualize the Simulation
  • Visualize the simulation by using NAM (Network Animator):

nam out.nam

  1. Further Testing and Customization
  • According to the requirements, you might need to further examine and tailor the EIGRP protocol to match your particular research demands.

Notes:

  • We have to understand both the EIGRP AND NS2’s architecture from the start before implementing EIGRP. You might want to start with modest protocols before trying EIGRP.
  • If you pick to incorporate an available implementation, ensure it’s compatible with your version of NS2 and thoroughly examine it for your use case.

In this report, we will help you to set up the simulation network and how to implement and evaluate the provided sample of Enhanced Interior Gateway Routing Protocol (EIGRP) in the ns2 environment. If needed, we can help you with another example of other simulation networks.

Ensure the successful implementation of the EIGRP protocol in NS2 with the assistance of our experts. At ns2project.com, we are committed to providing you with the highest quality implementation support.