http://www.rfc-editor.org/rfc/rfc3619.txt
RFC 3619: Extreme Networks' Ethernet Automatic Protection Switching (EAPS) Version 1, S. Shah, M. Yip2003-10-01T23:00:00-00:00This document describes the Ethernet Automatic Protection Switching (EAPS) (tm) technology invented by Extreme Networks to increase the availability and robustness of Ethernet rings. An Ethernet ring built using EAPS can have resilience comparable to that provided by SONET rings, at a lower cost and with fewer constraints (e.g., ring size).