This read-create Unsigned32 sets the Excess Burst Size (EBS) of a Quality-of-Service Shaper, the token-bucket depth available for excess-rate traffic bursts. Admins tune EBS to control how large a momentary traffic spike above the EIR can be absorbed without frames being dropped, balancing burst tolerance against buffer/latency cost. For example, a shaper serving a bursty video-surveillance flow might need a larger cmQosShaperEBS value than a steady voice flow to avoid dropping frames during scene-change spikes.