Network Working Group D. Black Request for Comments: 3140 S. Brim Obsoletes: 2836 B. Carpenter Category: Standards Track F. Le Faucheur June 2001 Per Hop Behavior Identification Codes Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract This document defines a 16 bit encoding mechanism for the identification of differentiated services Per Hop Behaviors in protocol messages. It replaces RFC 2836. Table of Contents 1. Introduction.................................................2 1.1. Usage Scenarios............................................2 2. Encoding.....................................................3 3. Signalling the Class Selector Codepoints.....................4 4. IANA Considerations..........................................5 5. Security Considerations......................................5 Changes from RFC 2836...........................................5 Acknowledgements................................................6 References......................................................6 Authors' Addresses..............................................6 Intellectual Property...........................................7 Full Copyright Statement........................................8 Black, et al. Standards Track