This is the third forward-direction traffic parameter, representing the Excess Burst size (Be) for Ethernet or Frame Relay circuits -- the additional buffer beyond Bc within which traffic is tagged (marked discard-eligible) rather than dropped outright, up to which point traffic is still admitted. This value effectively defines the gray zone between guaranteed CIR traffic and traffic that will be outright discarded, directly influencing whether circuitInFramesTagged or circuitInFramesDiscard increments during a burst. For example, a larger Be value gives this circuit more tolerance for temporary overages that get tagged and carried rather than dropped when the network is uncongested.