This read-only Counter32 counts packets discarded from the Hq hibernation queue because the Leq software's overall memory-usage ceiling was hit, a safeguard that stops any single queue from consuming all of the Passport's memory. This is a system-wide resource-pressure signal rather than a per-DLCI congestion one, so an admin seeing it climb should check whether many DLCIs/queues across the shelf are contending for memory at once, not just this one circuit's provisioning.