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Rethinking iBGP routing

Published: 30 August 2010 Publication History

Abstract

The Internet is organized as a collection of administrative domains, known as Autonomous Systems (ASes). These ASes interact through the Border Gateway Protocol (BGP) that allows them to share reachability information. Adjacent routers in distinct ASes use external BGP (eBGP), whereas in a given AS routes are propagated over internal BGP (iBGP) sessions between any pair of routers. In large ASes where a logical full-mesh is not possible, confederations or route reflectors (RRs) are used. However, these somewhat scalable alternatives have introduced their own set of unpredictable effects (persistent routing oscillations and forwarding loops causing an increase of the convergence time) addressed in the literature [1].
The solution we propose to these issues consists of a structured routing overlay holding a comprehensive view of the routes. We describe the design of a distributed entity that performs BGP route pre-computation for its clients inside a large backbone network and propagates the paths to the routers. Compared to the current iBGP routing, the advantage of the overlay approach is the separation between the responsibility of the control plane (route storage and best path computation) and the forwarding of the packets.
One of the major improvements we bring is the divided routing table tackling the scalability concerns and allowing for parallel computation of paths.

References

[1]
A. Rawat and M. A. Shayman, "Preventing persistent oscillations and loops in ibgp configuration with route reflection," Comput. Netw., vol. 50, no. 18, pp. 3642--3665, 2006.
[2]
S. Uhlig and S. Tandel, "Quantifying the bgp routes diversity inside a tier-1 network," in Networking, pp. 1002--1013, 2006.
[3]
T. G. Griffin and G. Wilfong, "On the correctness of iBGP configuration," SIGCOMM Computer Comm. Review, vol. 32, no. 4, pp. 17--29, 2002.
[4]
M. Caesar, D. Caldwell, N. Feamster, J. Rexford, A. Shaikh, and J. van der Merwe, "Design and implementation of a routing control platform," in Proc. of the 2nd NSDI, (Berkeley, CA, USA), 2005.
[5]
J. Fu, P. Sjödin, and G. Karlsson, "Intra-domain routing convergence with centralized control," Comput. Netw., vol. 53, no. 18, pp. 2985--2996, 2009.

Cited By

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  • (2014)Innovating on Interdomain Routing with an Inter-SDN ComponentProceedings of the 2014 IEEE 28th International Conference on Advanced Information Networking and Applications10.1109/AINA.2014.21(131-138)Online publication date: 13-May-2014
  • (2012)Constructing Robust Dissemination Paths in Centralized Control NetworkProceedings of the 2012 Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing10.1109/IMIS.2012.77(421-426)Online publication date: 4-Jul-2012
  • (2011)Virtual Area Routing: a Scalable Intra-Domain Routing SchemeAdvanced Engineering Forum10.4028/www.scientific.net/AEF.1.3201(320-324)Online publication date: Sep-2011

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    Information & Contributors

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    Published In

    cover image ACM SIGCOMM Computer Communication Review
    ACM SIGCOMM Computer Communication Review  Volume 40, Issue 4
    SIGCOMM '10
    October 2010
    481 pages
    ISSN:0146-4833
    DOI:10.1145/1851275
    Issue’s Table of Contents

    Publisher

    Association for Computing Machinery

    New York, NY, United States

    Publication History

    Published: 30 August 2010
    Published in SIGCOMM-CCR Volume 40, Issue 4

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    Author Tags

    1. bgp
    2. routing

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    View all
    • (2014)Innovating on Interdomain Routing with an Inter-SDN ComponentProceedings of the 2014 IEEE 28th International Conference on Advanced Information Networking and Applications10.1109/AINA.2014.21(131-138)Online publication date: 13-May-2014
    • (2012)Constructing Robust Dissemination Paths in Centralized Control NetworkProceedings of the 2012 Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing10.1109/IMIS.2012.77(421-426)Online publication date: 4-Jul-2012
    • (2011)Virtual Area Routing: a Scalable Intra-Domain Routing SchemeAdvanced Engineering Forum10.4028/www.scientific.net/AEF.1.3201(320-324)Online publication date: Sep-2011

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