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--- informatique:cisco:bgp [2012/07/12 13:09] – [Load Sharing] pteu
+++ informatique:cisco:bgp [2013/10/14 20:44] (current) – external edit 127.0.0.1
@@ Line 75: / Line 75: @@
   network 10.10.10.0 mask 255.255.255.0
+=====Détermination du meilleur chemin=====
+cf : BGP Best Path Selection Algorithm
+  * highest WEIGHT : c'est un paramètre propriétaire Cisco, pas toujours/souvent utilisé
+  * highest LOCAL_PREF : par défaut = 100
+  * locally originated via a //network// or //aggregate// BGP subcommand or through redistribution from an IGP
+  * shortest AS_PATH
+  * lowest origin type (IGP < EGP < INCOMPLETE)
+  * lowest multi-exit discriminator (MED) : uniquement si les next-hop appartiennent au même AS
+  * prefer eBGP over iBGP paths
+  * path with the lowest IGP metric to the BGP next hop
+  * When both paths are external, prefer the path that was received first (the oldest one)
+  * Prefer the route that comes from the BGP router with the lowest router ID
+  * Prefer the path that comes from the lowest neighbor address.
 =====Configuration avancée=====