You work for an organization that has a Direct Connect Connection and a backup VPN connection. This has been setup 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 even then this connection is being preferred. 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 static VPN instead of dynamic.
C.Increase 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 that 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 which is taken.
For more information on Routing, please refer to below URL:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Route_Tables.html#route-tables-vgw