Exam JN0-664 topic 1 question 2 discussion

The requirements for R1 to load balance are A, C, D. R2 and R3 settings are irrelevant.

You need the route in the table, R1 is the one that needs to LB so its an import policy which affects the routes from RIB to FIB as well as multipth on the bgp group.

ACD: set protocols bgp group external multipath set policy-options policy-statement loadbal then load-balance per-packet set routing-options forwarding-table export loadbal https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/load-balancing-bgp-session.html

ADE Export Policy: In Juniper, an export policy under routing-options would typically be used to control which routes are advertised to other peers. This does not directly influence how R1 handles incoming BGP routes for load balancing. Import Policy: For load balancing, you need to focus on import policies that affect how routes are accepted and processed. This is crucial for ensuring that multiple paths are used for forwarding traffic. Multipath Configuration: The multipath option under protocols bgp on R1 is essential for enabling the router to use multiple paths for BGP routes. To summarize, for Juniper devices, you should: Verify that the routing table on R1 has BGP routes for 203.0.113.128/25 with multiple next hops (Option A). Verify that the multipath option is configured under protocols bgp on R1 (Option D). Verify that an import load balancing policy exists under protocols bgp for the received BGP routes on R1 (Option E).

Correct Answer should be A,C,D

A,C, D are correct.

B and E are clearly wrong - no config is needed on R2 and R3 to enable load-balancing of "received-routes on R1

So the answer should be ace?