This read-only Counter32, in packets, counts the total number of out-of-order packets received through an active VPDN user session. Administrators use it to detect network path problems affecting a specific user's session, since out-of-order delivery often indicates route flapping, load balancing across unequal paths, or congestion along the session's path. For example, a user reporting choppy VPN performance whose session shows a high out-of-order packet count would point the admin toward a network path issue rather than a problem with the VPN client or server configuration itself.