An enterprise network uses ADVPN 2.0 with BGP running over IPsec tunnels. A spoke needs to initiate a shortcut tunnel to another spoke. Which FortiOS CLI command is used on the hub to verify the active shortcut tunnels and view the shortcut state information?
On the hub, diagnose vpn tunnel list enumerates IPsec tunnels including ADVPN shortcut sessions, showing their names, selectors and state. This confirms which spoke-to-spoke shortcuts are currently established and active without inspecting individual security associations.
Why this answer
On FortiOS, 'diagnose vpn tunnel list' displays all active IPsec tunnels including ADVPN shortcut tunnels, showing their names, source/destination, and state. This is the standard command to confirm that a shortcut has been negotiated between spokes and to inspect its current status.
Exam trap
The trap is selecting commands that sound network-diagnostic (like netlink interface list or sdwan neighbor) when the question specifically asks about IPsec/ADVPN shortcut tunnel state, which only 'diagnose vpn tunnel list' surfaces.
How to eliminate wrong answers
Option A is wrong because 'execute router clear bgp all' clears BGP sessions — it is a disruptive reset command, not a verification command, and does not show tunnel state. Option B is wrong because 'get system sdwan neighbor' displays SD-WAN neighbor/health-check information, not IPsec tunnel or ADVPN shortcut state. Option D is wrong because 'diagnose netlink interface list' shows kernel-level interface information and does not enumerate IPsec tunnels or their shortcut status.