Packet Clearing House: Using IXPs: Construction, Operation, and Measurement

Packet Clearing House

TunIXP Workshop on IXPsApril 29-30, 2013

Bill WoodcockExecutive Director

ISP Lifecycle: Simple Aggregator

Single Transit Provider

Customers

ISP Network

ISP Lifecycle: Redundancy and LCR

Redundant Transit Providers

Customers

ISP Network

ISP Lifecycle: Local Peer

Customers

ISP Network Single IXP

ISP Lifecycle: Backbone Network

Customers

ISP Network MultipleIXPs

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Red Customer sends to Green Customer via Red NSP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Red NSP delivers at nearest IXP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Green NSP backhauls from distant IXP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Green ISP delivers to Green Customer

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Green Customer replies via Green NSP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Green NSP delivers at nearest IXP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Red NSP backhauls from distant IXP

Hot Potato Routing

Red Customer

Red NSPNetwork

Green Customer

Green NSPNetwork

Red NSP delivers to Red Customer

Green Customer

Hot Potato Routing

Red Customer

Red NSPNetwork

Green NSPNetwork

Red Network is responsible for its own costs

Green Customer

Hot Potato Routing

Red Customer

Red NSPNetwork

Green NSPNetwork

Green Network is responsible for its own costs

Green Customer

Hot Potato Routing

Red Customer

Red NSPNetwork

Green NSPNetwork

Symmetry: Fair sharing of costs

For any two parties who wish to exchange traffic, there must be a pair of exchanges, one near each party.

The efficiency of the Internet depends upon this principle:

Countries which haven’t yet built Internet Exchange Points disadvantage themselves, and export capital to countries that already have.

The Corollary:

Distribution of IXPsHalf of all countries still have no IXP, while others have dozens.

Number of IXPs

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010

Number of IXPs

1992 1994 1996 1998 2000 2002 2004 2006 2008 2010

About one every three weeks

Growth of IXP Physical Plant

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Thanks, and Questions?

Copies of this presentation are available in PDF format.

Bill WoodcockExecutive Director

Packet Clearing Housewoody@pch.net+1 415 831 3103

Packet Clearing House: Using IXPs: Construction, Operation, and Measurement

Technology

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