Quick Notes - BGP Best Route Selection

BGP Best Route Selection

Once a match is found then the selection process is over

1 - Exclude any route with inaccessible next hop
2 - Prefer highest weight (weight is locally significant)
3 - Prefer highest local preference (globally used in AS)
4 - Prefer routers that were originated by the router
5 - Prefer Shortest AS Path
6 - Prefer lowest origin (IGP, EGP, Incomplete)
7 - Prefer lowest MED (MultiExit Discriminator)
8 - Prefer external paths over internal paths (iBGP)
9 - iBGP path - prefer path through with closest IGP
10 - eBGP path - oldest path
11 - Prefer path with lowest BGP router-id