Gill Bates is in charge of a large enterprise, which requires VPN connections between offices around the world. To achieve this Gill decides to use a dynamic routing protocol to make sure all offices are connected through the VPN community using tunnel interfaces among all peers. Nothing is configured in vpn_route.conf. However, Gill is experiencing connectivity problems and when examining the logs he discovers multiple “out of state” drops.
What is the most likely cause of and solution to this problem?
A.
Asymmetric routing will happen if nothing has been configured in vpn_route.conf.
The vpn_route.conf should be configured to prevent asymmetric routing
B.
The dynamic routing protocol introduces asymmetric routing in Gill’s VPN community. Gill should use wire mode on the VPN tunnel interfaces
C.
In this configuration, NAT is necessary for traffic to be routed correctly. IP pool NAT should be configured on each gateway
D.
The firewall security policy drops the traffic. Gill should introduce a Directional VPN rule to allow the VPN traffic