You work for an organization that has a Direct Connect Connection and a backup VPN connection. This has been set up just recently. After setting it up, the traffic flow still prefers the VPN connection instead of the Direct connection. You have prepended a longer AS_PATH on the VPN connection, but this connection is being preferred even then.
Which of the below steps can be used to ensure the Direct Connect connection is used?

Answer options:

A.Remove the prepended AS_PATH.
B.Reconfigure the VPN as a dynamic VPN.
C.Decrease the MED property on the VPN connection.
D.Advertise a less specific prefix on the VPN connection.

Answer – D
It could be that the route being specified for the routing table is more specific for the VPN connection. Hence this is being preferred.
The AWS Documentation clearly states that the most specific route in your route table matches the traffic to determine how to route the traffic is used.
Hence it is better to ensure the VPN connection has a less specific route to ensure that it is not the preferred route that is taken.
Option A is incorrect since the AS_PATH would not alter the requirements given in the question.
Option B is incorrect because when the VPN is configured as "dynamic" that would make the VPN preferred over Direct Connect, that would not solve the requirement given in the question.
Option C is incorrect because decreasing the MED property on the VPN would make it more preferred over Direct Connect.
https://aws.amazon.com/directconnect/faqs/???????
For more information on Routing using Route tables, please refer to the below URL:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Route_Tables.html#route-tables-vgw