This is the reverse-direction counterpart to cktOde, letting the admin independently enable graceful, prioritized, discard behavior for traffic flowing back toward the circuit's originating end, which matters when the two directions carry different mixes of critical versus discardable traffic. For example, an admin might enable cktROde on the reverse direction of a circuit carrying mostly bulk uploads, where graceful discard of low-priority frames helps, while leaving the forward direction's cktOde off if that direction carries only small, uniformly critical control traffic.