This sets how often the card re-raises an alert for the switching port's Pearl ASIC ABR (available bit rate) queue overflow condition. This tracks the same overflow condition but for the ABR queue on the switching port, a traffic class that's inherently rate-adaptive, so occasional brief overflow alerts here are less alarming than the same alert on the CBR queue, reflecting ABR's built-in tolerance for rate throttling. For example, an admin treats a one-off ABR overflow alert as low-priority noise, while the same alert firing on the CBR queue on that port would get immediate attention.