esaProbeStatsAvgOnewayR2PDelay is an unsigned 32-bit value that reports the average one-way delay, in microseconds, from the reflector back to the probe, for the interval that is still being actively collected (the live bin). Because this figure isolates delay from the reflector back to the probe only, it lets a technician tell whether a latency problem is one-sided rather than assuming the whole round trip is equally at fault. For example, if this average one-way delay from the reflector back to the probe creeps upward bin after bin on the live view, the technician can escalate before the circuit breaches its SLA commitment.