Lossless ECMP Convergence Based on LD/RD Degradation Signal Propagation

This document describes a mechanism for achieving lossless Equal-Cost Multi-Path (ECMP) convergence by utilizing the propagation of Local Degrade (LD) and Remote Degrade (RD) signals defined in the Physical Coding Sublayer (PCS) layer of IEEE 802.3. The mechanism enables proactive ECMP path switching upon detection of link degradation, before an actual link failure occurs, thereby preventing packet loss during routing convergence.