At a manufacturer, the VPN client on one laptop does not establish, while path tests from the office agent stay healthy. Where should diagnosis focus?
Select an answer to reveal the explanation.
Short Explanation
A locked side door is your problem when the main lobby is open and busy. You follow the VPN path from the laptop whose client does not establish, because the office path tests are already healthy. Swapping that WAN circuit, paging on BGP, or moving the data-center agent does not bring this client tunnel up.
Full Explanation
The office agent can reach what it tests, and this laptop cannot bring its VPN client up. Diagnosis belongs on the VPN path from that laptop: the client configuration, the path from that device to the VPN gateway, and whatever on the endpoint blocks the tunnel. Replacing the WAN circuit that the healthy office path tests have already cleared spends the outage on a circuit those tests show as fine. A BGP alert for a route those healthy office path tests do not blame watches routing the office evidence has not faulted, and it does not explain one client that fails to establish. Moving the data-center agent into a different rack changes a probe that is already healthy and leaves the laptop VPN client untouched. Exam caveat: a green office path test does not prove a VPN client on a single device can reach its gateway. Operational check: from that laptop, trace the attempt toward the VPN gateway and compare it with the healthy office-agent path so the circuit stays out of the ticket for this laptop.