This read-only Counter64 is the current total number of send-direction packets that the remote end received out of order on this VPath. An admin uses this to detect path instability affecting outbound traffic, since reordering can degrade real-time applications like voice even when packets aren't outright lost. For example, a high out-of-order count on the VPath to a branch using multiple underlying paths for load balancing could explain choppy audio despite low packet loss.