Which path would router A prefer for the 10.100/16 prefix?

— Exhibit –

— Exhibit —
Click the Exhibit button.
In the exhibit, the 10.100/16 prefix is introduced at autonomous system 1 (AS1) and propagated
through to AS3. Router A in AS3 receives two different paths to these prefixes, one through AS2
and the other through AS4. No BGP attributes have been altered.
Which path would router A prefer for the 10.100/16 prefix?

— Exhibit –

— Exhibit —
Click the Exhibit button.
In the exhibit, the 10.100/16 prefix is introduced at autonomous system 1 (AS1) and propagated
through to AS3. Router A in AS3 receives two different paths to these prefixes, one through AS2
and the other through AS4. No BGP attributes have been altered.
Which path would router A prefer for the 10.100/16 prefix?

A.
the route with the lowest interface address for the EBGP peering session

B.
the route with the lowest local preference

C.
the route to the EBGP peer that has the lowest RID

D.
the route from the EBGP peer that arrived first

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steve

steve

You see different numbers for the total amount of steps in different documentation: In this list is it the 8th.

The eight step selection criteria differs for internal routes and external routes. For internal routes it prefers the route with the lowest router-id. For external routes it selects the oldest active route. The behavior for external routes can be changed to also prefer the lowest router-id by using the path-selection external-router-id command.

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