Internet Definition of the Internet
1. If the next hop is inaccessible, do not consider it.
2. If the path is internal, synchronisation is enabled and the route is not in the IGP, do not consider the route.
3. Prefer the path with the largest weight
4. If the routes have the same weight, prefer the route with the largest local preference.
5. If the route have the same local preference, prefer the route that was originated by the local router.
6. If the local preference is the same and the route is not originated by the local router, prefer the route with the shortest AS path.
7. If the AS path length is the same, prefer the route with the lowest origin code, where IGP<EGP<INCOMPLETE
8. If the origin codes are the same, prefer the route with the lowest Multi Exit Discriminator (MED) attribute
9. If the routes have the same MED, prefer the external (EBGP) path over internal (IBGP) path.
10. Prefer the route that can be reached through the closest IGP neighbour (the lowest IGP metric).
11. If all of the above conditions are the same, the routes are from the same AS and multipath is enabled, install both routes in the routing table.
12. If multipath is not enabled, prefer the route with the lowest IP address value for the BGP router ID.
286:11 Prepend one additional 286 to all European peers
286:12 Prepend two additional 286’s to all European peers
286:13 Prepend three additional 286’s to all European peers
286:14 Prepend four additional 286’s to all European peers
286:18 Don’t announce to “in-country” peers
286:19 Don’t announce route to any European peers
286:100 Prepend one additional 286 to Ebone
286:101 Prepend two additional 286’s to Ebone
286:102 Prepend three additional 286’s to Ebone
286:103 Prepend four additional 286’s to Ebone
286:104 Don’t announce to Ebone