This Counter64 tallies octets transmitted out through the circuit that carry the DE bit, the byte-level egress counterpart to circuitOutDEFrames, quantifying how many bytes of already-flagged excess traffic successfully reached the far end of the circuit. Comparing this to circuitInDEOctets shows the byte-level survival rate of DE-marked traffic across the ring, complementing the frame-count comparison available via circuitOutDEFrames versus circuitInDEFrames. For example, a large disparity between circuitInDEOctets and this counter would indicate substantial byte loss specifically among traffic that was already flagged as lower priority.