Network Service Header (NSH) MD Type 1: Context Header Allocation (Data Center)
draft-ietf-sfc-nsh-dc-allocation-02

Document Type Active Internet-Draft (sfc WG)
Last updated 2018-09-25
Replaces draft-guichard-sfc-nsh-dc-allocation
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Service Function Chaining                               J. Guichard, Ed.
Internet-Draft                                       Huawei Technologies
Intended status: Informational                                  M. Smith
Expires: March 29, 2019                                         S. Kumar
                                                     Cisco Systems, Inc.
                                                                S. Majee
                                                             F5 Networks
                                                              T. Mizrahi
                                                                 Marvell
                                                      September 25, 2018

Network Service Header (NSH) MD Type 1: Context Header Allocation (Data
                                Center)
                  draft-ietf-sfc-nsh-dc-allocation-02

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   This Internet-Draft will expire on March 29, 2019.

Copyright Notice

   Copyright (c) 2018 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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Definition Of Terms . . . . . . . . . . . . . . . . . . . . .   2
   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 . . . . . . . . . . . . . . . . . . .   5
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   Network Service Header (NSH) [RFC8300] 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.

2.  Definition Of Terms

   This document uses the terms as defined in [RFC7498], [RFC7665], and
   [RFC8300].

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3.  Recommended Data Center MD Type 1 Fixed Length Context Allocation

   The following context header allocation provides information used to
   support SFC operation within a generic data center environment.
   [I-D.ietf-sfc-dc-use-cases] provides an overview of data center use
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