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View all- Pelsser CTakeda TOki EShiomoto K(2008)Improving Route Diversity through the Design of iBGP Topologies2008 IEEE International Conference on Communications10.1109/ICC.2008.1073(5732-5738)Online publication date: May-2008
Automating the iBGP organization in large IP networks
Article No.: 41, Pages 1 - 2
Abstract
For years, the Border Gateway Protocol has been used as the interdomain routing protocol inside the Internet [9]. This protocol allows ASes to exchange routes to reachable destinations. A BGP route contains, among other attributes, the list of ASes that form a path to the destination, i.e. an IP prefix. This list is called an AS Path. Thanks to the BGP routes it receives, an AS has all the information needed to forward packets towards their destination by sending them to the best BGP nexthop in the first AS in the AS Path. In practice, there are several BGP routers inside an AS. The routes from a neighbouring AS are received by the routers that have a peering session with this neighboring AS. Such sessions are called eBGP sessions. However, other routers that do not have a peering session with this particular neighbour also need to receive this information. For this purpose, routers inside an AS establish internal BGP sessions, called iBGP sessions.
References
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T. Bates, R. Chandra, and E. Chen. BGP route reflection - an alternative to full mesh iBGP. Internet RFC 2796, April 2000.
[2]
O. Bonaventure, C. Filsfils, and P. Francois. Achieving sub-50 milliseconds recovery upon BGP peering link failures. In Co-Next 2005, Toulouse, France, October 2005.
[3]
Cisco Systems. IOS 12.4. http://www.cisco.com, May 2007.
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T. Griffin and G. Wilfong. Analysis of the MED oscillation problem in BGP. In ICNP2002, 2002.
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Juniper. Junos 7.6. http://www.juniper.net/techpubs/software/junos/junos76/index.html, May 2006.
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R. Mahajan, D. Wetherall, and T. Anderson. Understanding BGP misconfigurations. In ACM SIGCOMM 2002, August 2002.
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D. McPherson, V. Gill, D. Walton, and A. Retana. Border Gateway Protocol (BGP) Persistent Route Oscillation Condition. RFC 3345 (Informational), Aug. 2002.
[8]
B. Quoitin and S. Uhlig. Modeling the routing of an Autonomous System with C-BGP. IEEE Network, 19(6), November 2005.
[9]
Y. Rekhter, T. Li, and S. Hares. A Border Gateway Protocol 4 (BGP-4). RFC 4271 (Draft Standard), Jan. 2006.
[10]
S. Uhlig and S. Tandel. Quantifying the impact of route-reflection on bgp routes diversity inside a tier-1 network. In IFIP Networking 2006, Coimbra, Portugal, May 2006.
[11]
V. Van den Schrieck, P. Francois, S. Tandel, and O. Bonaventure. Let BGP speakers configure their ibgp sessions on their own. Position Paper, Wired2006 Workshop, Atlanta, October 2006.
[12]
D. Walton, D. Cook, A. Retana, and J. Scudder. Advertisement of Multiple Paths in BGP. Internet draft, November 2002.
- Automating the iBGP organization in large IP networks
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Published: 10 December 2007
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View all- Pelsser CTakeda TOki EShiomoto K(2008)Improving Route Diversity through the Design of iBGP Topologies2008 IEEE International Conference on Communications10.1109/ICC.2008.1073(5732-5738)Online publication date: May-2008
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