Simulation of BGP Protocol Ahmad Salam AlRefai Wael F. Al Takrouri December 28, 2008 Using OPNET IT...

Simulation of BGP Protocol

Ahmad Salam AlRefai Wael F. Al Takrouri

December 28, 2008

Using OPNET IT Guru Simulating Tool

Simulation of BGP using OPNet

AlRefai & Al Takrouri 2

Outline

Introduction Autonomous System Border Gateway Protocol OPNET IT Guru Simulation Procedure Conclusion Questions & Answers

Introduction

Simulation of Border Gateway Protocol using IT Guru as simulation tool.

Measure the performance of BGP protocol of a baseline model (consists of no. of Autonomous Systems)

Autonomous System

Autonomous System (AS) is a group of routers that are typically under the same administrative control (operated by the same ISP or belonging to the same company)[1].

Routers within the same AS all run the same algorithm.

Autonomous System (cont.)

Three Autonomous Systems[2]

Autonomous System (cont.)

Each AS has one or more router(s) that are responsible communicating with other Ass and responsible for forwarding packets to destination these routers are called gateway routers or border routers.

Each AS has a unique number that distinguishes it from other AS this number is called the autonomous system number or ASN

Border Gateway Protocol

Border Gateway Protocol or BGP is routing protocol for the internet.

There are two forms of BGP, Interior Border

Gateway Protocol or IBGP when it runs on same AS and Exterior Border Gateway Protocol when it runs on between different Autonomous Systems

Border Gateway Protocol (BGP) Mainly BGP provide AS with methods to

Obtain subnet reachablitiy information form neighboring AS

Propagate the reachablitiy information to all router in a AS

Determine good routers to subnet based one the reachablitiy information and AS policy

OPNET IT Guru

OPNET IT Guru Academic 9.1 is selected as simulating tool

Run Windows operating system Has many good features

Usability Supporting large number of simulated devices Speed of Simulation

Simulation Procedure

Simulation Result

Slip8_gtwy

PPP_DS3

Router Naming

After Arrangement

Set Autonomous Number

larger

Set Autonomous Number

Don’t Forget to …

Check Apply Changes to

Selected Objects

Check Links

Before you run

Running

Go to file and do refresh

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Open Generic Data file

Select ..

larger

Set Neighboring Information

Edit Neighboring Infos

You can set timer parameters

Export Routing…

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Run for 30 Minutes

For Routing table you can export

We can now select statistics

Right Click on Empty

Place Choose

Individual Statistics

Click View Results Button

Some Results – overall

Some Results – on R10

Average and overlaid

Simulation Log

IP routing table/ choose router and see the routing table

Routing table

References

[1] Kurose, Roos (2005) Computer Networking A top Down Approch Featuring The Internet : Pearson

[2] www.cisco.com/image/gif/paws/26634/bgp-toc2.gif

[3] Laboratory 6: Border Gateway Protocol (BGP)

Simulation of BGP Protocol Ahmad Salam AlRefai Wael F. Al Takrouri December 28, 2008 Using OPNET IT...

Documents

Ahmad Salam AlRefai. Introduction System Features General Overview (general process) Details of each component Simulation Results Considerations

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