Reference : BGP-aware IGP Link Weight Optimization in Presence of Route Reflectors

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Computer science
	To cite this reference:	http://hdl.handle.net/2268/5420

Title :	BGP-aware IGP Link Weight Optimization in Presence of Route Reflectors
Language :	English
Author, co-author :	Balon, Simon [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Réseaux informatiques >]
	Leduc, Guy [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Réseaux informatiques >]
Publication date :	Apr-2009
Main document title :	IEEE INFOCOM 2009
Publisher :	IEEE
On invitation :	No
Audience :	International
Event name :	IEEE INFOCOM 2009
Event date :	20-24 April 2009
Event place (city) :	Rio de Janeiro
Event country :	Brazil
Keywords :	[en] Traffic engineering ; BGP ; Route reflector
Abstract :	[en] The first generation of IGP Link Weight Optimizers (LWOs) was based on presumably invariant intra-domain traffic matrices only, ignoring the fact that updating link weights had a side effect on these traffic matrices due to hot-potato routing, thus result- ing in suboptimal link weight settings, and sometimes to very bad performance. The second generation of IGP LWOs, referred to as BGP-aware LWOs, has been able to optimize link weights while taking hot-potato effects into account. However, these tools relied on the complete visibility assumption fulfilled by e.g. a full-mesh iBGP configu- ration. This paper proposes a third generation LWO, still BGP-aware, but also able to work with iBGP con- figurations based on route reflectors, which usually hide some reachability information from routers. This partial visibility may cause various problems, including path deflections (i.e., the actual egress router is not the expected one), which may in turn create forwarding loops. Our LWO embeds a BGP routing solver which can always predict the actual egress router, even when route reflectors are used. It can also forbid solutions leading to path deflection. Its efficiency is evaluated on a real dataset, and compared to other LWOs.
Name of the research project :	EU FP6 ANA
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/5420

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