Requirements of Fast Notification for Traffic Engineering and Load Balancing

This document defines the requirements for Fast Notification for Traffic Engineering and Load Balancing (FaNTEL), a mechanism designed to deliver timely network status updates directly from the network device with a change to the device expected to react to it. FaNTEL supports fast failure and congestion notifications, enabling rapid protection switching and dynamic load balancing. By providing low- latency alerts, it helps networks respond quickly to link failures and congestion events, enhancing service reliability and performance.