Which CLI command can the engineer use?

An engineer troubleshooting a VPN issue needs to manually initiate a VPN tunnel from the CLI.

Which CLI command can the engineer use?
A . test vpn flow
B. test vpn Ike―sa
C. test vpn tunnel
D. test vpn gateway

Answer: D

Explanation:

The engineer can use the test vpn gateway CLI command to manually initiate a VPN tunnel from the CLI. This command allows the engineer to specify the name of the VPN gateway and the IP address of the peer to initiate an IKE negotiation and establish a VPN tunnel. Option A is incorrect because test vpn flow is not a valid CLI command. Option B is incorrect because test vpn ike-sa is a CLI command that displays information about the IKE security associations, not initiates a VPN tunnel. Option C is incorrect because test vpn tunnel is a CLI command that displays information about the IPSec security associations, not initiates a VPN tunnel.