Latency-based ECN

You can use latency-based explicit congestion notification (ECN) to mark congestion based on instantaneous per-packet latency instead of buffer occupancy, reducing loss and optimizing utilization. 

• Enable optional hardware latency tracking with [set class-of-service options latency-tracking].
• Define a global ECN latency threshold with [set class-of-service options latency-ecn threshold] value, where the threshold value ranges from 1ns-100ms.
• Activate marking per queue or scheduler using [set class-of-service forwarding-classes class class-name queue-num queue-number latency-ecn] or [set class-of-service schedulers scheduler-name latency-ecn].