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
C is how Juniper does it. D is wrong for Juniper but correct for CISCO
Very sneaky I have to go undeclared and trending to D.
C.
the route to the EBGP peer that has the lowest RID
is the correct answer.. 🙂
http://www.juniper.net/techpubs/software/junos-security/junos-security95/junos-security-swconfig-interfaces-and-routing/section-bgp-overview.html#jd0e57856
Correct Answer is D,
By default, the router IDs of routes received from different ASs are not compared. You can change this default behavior. For more information,
and moreover as per the above statement none of the attributes of BGP had been changed and all are remains in Default.