BGP skeleton : an alternative to iBGP route reflection - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2010

BGP skeleton : an alternative to iBGP route reflection

Résumé

The Internet is a composition of ASes (Autonomous Systems), BGP (Border Gateway Protocol) is the routing protocol that is responsible of exchanging routes between these ASes. It operates in two modes: External BGP (eBGP) and Internal BGP (iBGP). EBGP exchanges routing information between ASes, while iBGP propagates that information within the AS. BGP Full Mesh Solution (FMS) is based on that all the ASBRs (Autonomous System Border Routers) should be fully meshed and each internal node should have an iBGP session with all of them. This was because an iBGP node does not have the ability to reflect routes. BGP route reflection was widely employed as an alternative to full mesh to reduce the needed number of iBGP sessions and, in turn, increase the scalability inside the AS. Under particular configuration, it introduces persistent route oscillation, forwarding loops, and non-optimal egress nodes. Skeleton is an alternative to route reflection that overcomes these routing anomalies. Skeleton is a subgraph of the physical graph with the same set of nodes, its edges are the iBGP sessions between the nodes. All Skeleton nodes have the ability of reflecting routes. Skeleton eliminates the use of clusters and establishes iBGP sessions only between single hop neighbors. We prove that it holds the sufficient correctness conditions as well as its robustness against MED induced oscillations. We evaluate it on five real world topologies and find that the number of iBGP sessions has a linear relationship with the number of ASBRs, where in FMS this relationship is quadratic

Mots clés

Fichier non déposé

Dates et versions

hal-01309502 , version 1 (29-04-2016)

Identifiants

Citer

Bakr Sarakbi, Stephane Maag. BGP skeleton : an alternative to iBGP route reflection. INFOCOM 2010 : 29th Conference on Computer Communications, Mar 2010, San Diego, Ca, United States. pp.1 - 5, ⟨10.1109/INFCOM.2010.5462223⟩. ⟨hal-01309502⟩
66 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More