This sets the absolute maximum length of the VBR-NRT queue, beyond which the card discards all cells regardless of CLP marking, the VBR-NRT counterpart to cardClp01CbrThreshold. Reaching this ceiling on the NRT queue means the card is discarding even guaranteed cells from bursty data traffic, which, unlike the same event on a CBR or VBR-RT queue, usually manifests as retransmissions and reduced throughput rather than an immediately perceptible quality problem, since NRT traffic is generally more delay- and loss-tolerant. For example, an admin seeing discards traced to cardClp01VbrNrtThreshold on a data-heavy card investigates whether the queue is simply undersized for current NRT traffic volume rather than treating it as an emergency the way a similar CBR event would be.