Futurewei Technologies Huawei Technologies Cisco Systems China Mobile China Telecom China Unicom Telefonica COSCO Shipping Technology Co., Ltd. High-performance network applications, such as AI/ML distributed training/inference and large-scale cloud services, require rapid adaptation to link faults, signal degradation, and transient congestion. Existing dissemination mechanisms are often too slow or coarse to match the detection capabilities of modern forwarding hardware. This document specifies a framework for Fast Network Notifications (FANN). It defines the reference architecture, functional roles, information model, delivery and scoping mechanisms, operational procedures, and integration principles with existing protocols to guide future protocol specifications.