This 64-bit counter tallies a hardware data-parity check failing on a frame arriving over the internal path from the router's own forwarding engine, over the current, still-running 15-minute window. Because this is on the host side, not the ring fiber, it points at a parity fault in this box's own internal bus or SRP interface ASIC rather than at anything happening out on the optical ring, so troubleshooting should focus on this card's hardware rather than on fiber or neighboring nodes. A data-parity error rate here that persists even after the ring-side srpRingCurRxErrorsDataParity counter stays flat would point squarely at this box's own SRP interface card rather than at the ring itself.