Multi-domain Service Forwarding For NSH
draft-li-sfc-nsh-multi-domain-01

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Last updated 2016-10-21
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Service Function Chaining                                    Guanwen Li
Internet Draft                                              Guanglei Li
Intended status: Standards Track                              Taixin Li
Expires: April 22, 2017                                           Qi Xu
                                                             Bohao Feng
                                                           Huachun Zhou
                                            Beijing Jiaotong University
                                                       October 21, 2016

                  Multi-domain Service Forwarding For NSH
                     draft-li-sfc-nsh-multi-domain-01

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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Abstract

   This document describes the mechanism to achieve multi-domain service
   forwarding for NSH. The purposed mechanism adopts a horizontal
   deployment structure, which divides a multi-domain SFC into several
   segmental SFCs in the control plane and each domain creates its own
   SFP independently in data plane. A label is purposed to identify
   different cross-domain flows at the classifier by extending the
   metadata of the NSH encapsulation.

Table of Contents

   1. Introduction ................................................ 2
      1.1. Requirement Language.................................... 3
   2. Definition Of Terms ......................................... 4
   3. Multi-domain Service Forwarding Mechanism ................... 3
      3.1. Service Function Chaining Segmentation ................. 4
      3.2. Inter-domain Service Forwarding ........................ 4
      3.3. Classification and Intra-domain Service Forwarding...... 5
   4. Multi-domain Service Forwarding Encapsulation ............... 5
   5. Multi-domain Service Forwarding Example ..................... 6
   6. Security Considerations...................................... 7
   7. IANA Considerations ......................................... 8
   8. Conclusions ................................................. 8
   9. References .................................................. 8
      9.1. Normative References.................................... 8
      9.2. Informative References.................................. 8
   10. Acknowledgments ............................................ 9

1. Introduction

   Service Function Chaining (SFC) [RFC7665] is an architecture purposed
   to decouple traditional network service functions with corresponding
   physical resources. It is flexible and convenience for a network
   operator to deploy on-demand service functions and steer the traffic
   through them in sequence.

   Network Service Header (NSH) [I-D.ietf-sfc-nsh] is defined as a data
   plane protocol to create a dynamic service function chaining.
   According to the NSH encapsulation, the flow can pass along its
   service function path and exchange metadata among the Service

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   Classifier, the Service Function and the Service Function Forwarder
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