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Commentary on Inter-Domain Routing in the Internet (RFC3221)

IP.com Disclosure Number: IPCOM000006282D
Original Publication Date: 2001-Dec-01
Included in the Prior Art Database: 2019-Feb-13
Document File: 25 page(s) / 39K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Huston: AUTHOR

Related Documents

10.17487/RFC3221: DOI

Abstract

This document examines the various longer term trends visible within the characteristics of the Internet's BGP table and identifies a number of operational practices and protocol factors that contribute to these trends. The potential impacts of these practices and protocol properties on the scaling properties of the inter-domain routing space are examined. This memo provides information for the Internet community.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group G. Huston Request for Comments: 3221 Internet Architecture Board Category: Informational December 2001

Commentary on Inter-Domain Routing in the Internet

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2001). All Rights Reserved.

Abstract

This document examines the various longer term trends visible within the characteristics of the Internet’s BGP table and identifies a number of operational practices and protocol factors that contribute to these trends. The potential impacts of these practices and protocol properties on the scaling properties of the inter-domain routing space are examined.

This document is the outcome of a collaborative exercise on the part of the Internet Architecture Board.

Table of Contents

1. Introduction................................................. 2 2. Network Scaling and Inter-Domain Routing ................... 2 3. Measurements of the total size of the BGP Table ............ 4 4. Related Measurements derived from BGP Table ................ 7 5. Current State of inter-AS routing in the Internet .......... 11 6. Future Requirements for the Exterior Routing System ........ 14 7. Architectural Approaches to a scalable Exterior Routing Protocol........................................... 15 8. Directions for Further Activity ............................ 21 9. Security Considerations .................................... 22 10. References ................................................. 23 11. Acknowledgements ........................................... 24 12. Author’s Address ........................................... 24 13. Full Copyright Statement ................................... 25

Huston Informational [Page 1]

RFC 3221 Commentary on Inter-Domain Routing December 2001

1. Introduction

This document examines the various longer term trends visible within the characteristics of the Internet’s BGP table and identifies a number of operational practices and protocol factors that contribute to these trends. The potential impacts of these practices and protocol properties on the scaling properties of the inter-domain routing space are examined.

These impacts include the potential for exhaustion of the existing Autonomous System number space, increasing convergence times for selection of stable alternate paths following withdrawal of route announcements, the stability of table entries, and the average prefix length of entries in the BGP table. The larger long term issue is that of an increasingly denser inter-connectivity mesh between ASes, causing a finer degree of granularity of inter-domain policy and finer levels of control to undertake inter-domain traffic engineering.

Various approaches to a refinement of the inter-domain routing protocol and associated operating practices that may provide superior scaling properties ar...

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