This read-create integer sets the CIR for queue 8, where 0 means the queue currently has no rate shaping applied. Because queue 8 is often the highest-priority queue, setting a CIR here would deliberately cap even that top queue's sustained rate if needed. For example, an admin might leave queue 8's CIR at 0 to let the top-priority queue use as much bandwidth as it needs, unconstrained by shaping.