getdraft.j19867

IPv6协议中flow_label的相关RFC

Internet Engineering Task Force                                 J. Bound
Internet-Draft                                                    NAv6TF
Expires: October 8, 2005                                  S. Chakravorty
                                                                K. Zhang
                                                   The MITRE Corporation
                                                           April 9, 2005


                Proposal for a New Flow Label Definition
                   draft-chakravorty-bcc-flowlabel-00

Status of this Memo

   This document is an Internet-Draft and is subject to all provisions
   of section 3 of RFC 3667.  By submitting this Internet-Draft, each
   author represents that any applicable patent or other IPR claims of
   which he or she is aware have been or will be disclosed, and any of
   which he or she become aware will be disclosed, in accordance with
   RFC 3668.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as
   Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.

   This Internet-Draft will expire on October 8, 2005.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   The IPv6 header includes a 20-bit Flow Label field.  RFC 3697, "IPv6
   Flow Label Specification" [1] specified this field and minimum
   requirements for using the field.  This document first identifies
   several issues related to the current Flow Label specification; then
   it discusses the limitations of the current specification and the



Bound, et al.           Expires October 8, 2005                 [Page 1]

Internet-Draft    Proposal for a New Flow Label Definition    April 2005


   need for extending the definition to accommodate emerging
   applications and protocols; finally, a new Flow Label specification
   is proposed that enables more effective usage of this field.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Background . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Issues Concerning the Current Flow Label . . . . . . . . . . .  5
   4.  New Flow Label Specification . . . . . . . . . . . . . . . . .  7
     4.1   Implications . . . . . . . . . . . . . . . . . . . . . . .  9
   5.  An Emerging Usage for the Flow Label Field . . . . . . . . . .  9
   6.  Benefits of Flexible Label . . . . . . . . . . . . . . . . . . 10
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
   8.  Acknowlegements  . . . . . . . . . . . . . . . . . . . . . . . 13
   9.  Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . 13
   10.   References . . . . . . . . . . . . . . . . . . . . . . . . . 13
       Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . 14
       Intellectual Property and Copyright Statements . . . . . . . . 15
































Bound, et al.           Expires October 8, 2005                 [Page 2]

Internet-Draft    Proposal for a New Flow Label Definition    April 2005


1.  Introduction

   The IPv6 header includes a 20-bit Flow Label field.  RFC 3697 [1]
   specified this field and the minimum requirements required for using
   it.  This document identifies several issues related to the current
   Flow Label specification, it also discusses the limitations of the
   current specification and the need for expanding the definition to
   accommodate emerging applications and protocols.  Additionally, a new
   Flow Label definition is proposed that enables more effective use of
   this field.

   A Flow Label is defined in [1] to be 鎍 sequence of packets sent from
   a particular source to a particular unicast, anycast, or multicast
   destination that the source desires to label as a flow.