Network Working Group A. Charny Request for Comments: 3247 Cisco Systems, Inc. Category: Informational J.C.R. Bennett Motorola K. Benson Tellabs J.Y. Le Boudec EPFL A. Chiu Celion Networks W. Courtney TRW S. Davari PMC-Sierra V. Firoiu Nortel Networks C. Kalmanek AT&T Research K.K. Ramakrishnan TeraOptic Networks March 2002 Supplemental Information for the New Definition of the EF PHB (Expedited Forwarding Per-Hop Behavior) Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract This document was written during the process of clarification of RFC 2598 "An Expedited Forwarding PHB" that led to the publication of revised specification of EF "An Expedited Forwarding PHB". Its primary motivation is providing additional explanation to the revised EF definition and its properties. The document also provides additional implementation examples and gives some guidance for computation of the numerical parameters of the new definition for several well known schedulers and router architectures. Charny, et. al. Informational