Which mechanism should the engineer apply in order to steer the traffic correctly?

Refer to the exhibit.

An engineer has successfully fixed BGP peering issue. R1 has an established eBGP peering with R2 and R3.

Which mechanism should the engineer apply in order to steer the traffic correctly?
A . The MED attribute can be applied on R2 to influence R1 to use it as the primary path.
B . The local preference attribute can be applied on R3 to influence AS 65513 to use AS 65515 as the secondary path.
C . The weight attribute can be applied on R2 to influence AS 65513 to use AS 65515 as the primary path.
D . The IGP metric can be manipulated on R1 to allow traffic to be load balanced between R2 and R3.

View Answer

Answer: D

Explanation:

Some level of load balancing is achieved by default as BGP prefers shortest AS_PATH for certain prefix (Cisco BGP path selection algorithm – rule 4) . If 1-7 rules gives no preference for certain prefix then with rule 8. Prefer lowest IGP metric to BGP next hop we can force traffic to R2 or R3 influencing load distribution.