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



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Set Autonomous Number



Don’t Forget to …

Check Apply Changes to

Selected Objects



Check Links



Run



Before you run



Running



Go to file and do refresh



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Open Generic Data file



Select ..



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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...

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