Route Attributes

BGP Next_Hop

BGP ignores routes with an unreachable next hop address during BGP route selection.

PrefVal

BGP prefers the route with the largest PreVal value during BGP route selection.

Local_Pref

BGP prefers the route with the highest Local_Pref during BGP route selection.

Route Type

BGP prefers locally imported routes to the routes learned from peers during BGP route selection.

AIGP

BGP prefers the route with the smallest AIGP value during BGP route selection.

AS_Path

BGP prefers the route with the shortest AS_Path length (the number of included ASs) during BGP route selection.

Origin

The Origin attribute indicates how routes become BGP routes.

MED

MED attributes of routes can be configured as required to control traffic forwarding path for the purpose of load balancing.

Peer Type

When IBGP routes (routes learned from IBGP peers) and EBGP routes (routes learned from EBGP peers) are available, BGP preferentially selects EBGP routes.

IGP Cost

BGP prefers the route with the smallest IGP cost during BGP route selection.

Cluster_List

BGP prefers the route with the shortest Cluster_List length during BGP route selection.

Originator_ID

If routes carry the Originator_ID, the originator ID is substituted for the router ID during route selection. The route with the smallest Originator_ID is preferred.

Router ID

If multiple routes to the same destination are available, BGP preferentially selects the route advertised by the device with the smallest router ID.

Peer IP Address

BGP prefers the route learned from the peer with the smallest IP address during BGP route selection.