Border Gateway Protocol (BGP) Data Analysis

Ofori Kwadwo, SUNY Old Westbury, McNair

Agbeko Komla, Clarkson Univ., McNair

Renle Xia, Monroe College, McNair

Dr. Jeanna Matthews, Clarkson University

Todd Deshane, Clarkson University

Mathematics & Computer Science Department

Overview

Motivation

Project Objectives

Data Analysis

Current Results

Future Work

The Problem

How big is the Internet?

200 million hosts

How do packets find their way from source machine to destination?

Internet Navigation

Divide and ConquerAutonomous SystemsHow many Autonomous Systems are there?

• About 65,536 ASes

There is still a problem…

RoutersDetermine the next network point for a packet

BGP The language spoken by routers between ASes

BGP Overview

Routers “gossip” about paths

Packets Routers

Routing Instability

What can lead to Internet instability?

Inaccurate gossip

Changes in paths

Malfunctioning routers

Project Objectives

To analyze actual traces of BGP conversations

To use this data to really understand how BGP behaves in practice

To examine the implication of BGP data on the stability of Internet routing

To read and validate existing research in this area on this data set

Project Procedure

Collect raw data

Import into database

Query the database

Analyze results

Data Information

Announcement

Contains a new path Can reach the route prefix

through the path:

The format of an announcement Message

BGP | 884831401 | A | 144.228.107.1 | 1239 | 205.113.0.0/16 |1239 6453 5769 |IGP | 192.41.177.241 | 0 | 91

Protocol | Time | Type | PeerIP | PeerAS | Prefix

205.113.0.0/16

1239 6453 5769

Withdrawal

Path is no longer available• i.e: the route prefix

is no longer reachable by the previous announced path

The format of a withdrawal Message

Protocol | Time | Type | PeerIP | PeerAS | Prefix

BGP | 884831402 | W | 204.70.7.53 | 3561 |198.163.111.0/24

198.163.111.0/24

Data Analysis

BGP | 884831401 | A | 144.228.107.1 | 1239 | 205.113.0.0/16 |1239 6453 5769 |IGP | 192.41.177.241 | 0 | 91

What is the average Path Length?

How rapidly do announced paths change? How often are they withdrawn?

BGP Messages

0

2000000

4000000

6000000

8000000

10000000

12000000

14000000

16000000

18000000

20000000

1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46

Month from 1997 to 2000

Num

ber o

f Mes

sage

sWithdrawal

Announcement

1997 1998 1999 2000

June 1997

0

100000

200000

300000

400000

500000

600000

700000

800000

900000

1000000

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31

Withdraw

Announcement

June 1998

0

100000

200000

300000

400000

500000

600000

700000

800000

900000

1000000

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31

Withdrawal

Announcement

Average Length Path

2

2.5

3

3.5

4

4.5

5

1 2 3 4 5 6 7

Year

Path

s pe

r Mes

sage

Paix

AADS

PBAverage Path Length

1997 1998 1999 2000 2001 2002 2003

Future Work

Import data from 2001 to present

Analyze trends

Compare those result to the current ones

Develop an easy web front end to the database

Acknowledgements

McNair Scholars Program

Director- Cathy Clark

Project Director- Alan Rossner

Administrative Assistant- Tammy Kunz

Instructor- Sara Morrison

Mathematics & Computer Science Department

Mentor- Dr. Jeanna Matthews

Graduate Student- Todd Deshane

Graduate Student- Patty Jablonski

Questions ?