Network Service Header (NSH) MD Type 1: Context Header Allocation (Data Center)
draft-guichard-sfc-nsh-dc-allocation-07

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Last updated 2017-12-21 (latest revision 2017-08-18)
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Service Function Chaining                                    J. Guichard
Internet-Draft                                                    Huawei
Intended status: Informational                                  M. Smith
Expires: February 19, 2018                                      S. Kumar
                                                     Cisco Systems, Inc.
                                                                S. Majee
                                                             F5 Networks
                                                              P. Agarwal
                                                                Broadcom
                                                               K. Glavin
                                                                Riverbed
                                                               Y. Laribi
                                                                  Citrix
                                                              T. Mizrahi
                                                                 Marvell
                                                         August 18, 2017

Network Service Header (NSH) MD Type 1: Context Header Allocation (Data
                                Center)
                draft-guichard-sfc-nsh-dc-allocation-07

Abstract

   This document provides a recommended default allocation for the
   Network Service Header (NSH) MD Type 1 fixed length context header
   when NSH is used for Service Function Chaining within a data center.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 19, 2018.

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Internet-Draft    NSH Context Allocation (Data Center)       August 2017

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Definition Of Terms . . . . . . . . . . . . . . . . . . . . .   3
   3.  Recommended Data Center MD Type 1 Fixed Length Context
       Allocation  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Data Center Allocation Specifics  . . . . . . . . . . . .   3
   4.  Context Allocation and Control Plane Considerations . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Network Service Header (NSH) [I-D.ietf-sfc-nsh] provides a mechanism
   to carry shared metadata between network devices and service
   functions, and between service functions.  When MD Type 1 is used,
   such metadata is carried within a fixed length (16-bytes) context
   header.

   This document provides a recommended default allocation of the MD
   Type 1 context header for Service Function Chaining [RFC7665] within
   a data center.  The context header may be used to support use cases
   such as those described in [I-D.ietf-sfc-dc-use-cases].

   The goal of this document is to provide a reference allocation that
   may be used with or without a control plane.  It also serves as a
   guide to implementers and network operators.

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