AS_PATH | A list of ASes a route has passed through. See “AS_PATH”. |
MULTI_EXIT_DESC (MED) | Which router to use to exit an AS with more than one external connection. See “MULTI_EXIT_DESC (MED)”. |
COMMUNITY | Used to apply attributes to a group of routes. See “COMMUNITY”. |
NEXT_HOP | Where the IP packets should be forwarded to, like a gateway in static routing. See “NEXT_HOP”. |
ATOMIC_AGGREGATE | Used when routes have been summarized to tell downstream routers not to de-aggregate the route. See “ATOMIC_AGGREGATE”. |
ORIGIN | Used to determine if the route is from the local AS or not. See“ORIGIN”. |
LOCAL_PREF | Used only within an AS to select the best route to a location (like MED) |
Inbound policies on FortiGate units can change the NEXT-HOP,LOCAL-PREF, MED and AS-PATH attributes of an internal BGP (iBGP) route for its local route selection purposes. However, outbound policies on the unit cannot affect these attributes. |