A Method for Service Orchestration in hSFC
draft-xu-sfc-hierarchical-orchestration-03

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Last updated 2018-09-30
Replaces draft-xu-sfc-coordinated-forwarding
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Service Function Chaining                                       Qi Xu
Internet Draft                                           Huachun Zhou
Intended status: Informational                              Taixin Li
Expires: April 2019                                       Guanglei Li
                                                           Guanwen Li
                                          Beijing Jiaotong University
                                                   September 27, 2018

                A Method for Service Orchestration in hSFC
              draft-xu-sfc-hierarchical-orchestration-03.txt

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Internet-Draft  draft-xu-sfc-hierarchical-orchestration September 2019

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Abstract

   Hierarchical SFC is a network architecture for implementing SFC the
   chain with an ordered set of service functions which could be
   deployed in multiple geographically dispersed networks. How to
   forward traffic between networks in Hierarchical SFC is what the
   draft wants to present.

   This document proposes a mapping-based forwarding method with
   coordinated orchestration by the translation of H-SFC and I-SFC to
   forward traffic between networks in Hierarchical SFC.

Table of Contents

   1. Introduction ................................................ 2
      1.1. Assumptions ............................................ 3
      1.2. Requirements Language................................... 3
   2. Terminology ................................................. 3
   3. Hierarchical Service Orchestration........................... 3
      3.1. East-west interface..................................... 4
         3.1.1. C5: Interface between SFC Control Planes........... 4
         3.1.2. Interface between SFC Control Planes and IBN....... 5
      3.2. Hierarchical service orchestration...................... 5
   4. Metadata Consideration....................................... 5
   5. Security Considerations...................................... 5
   6. IANA Considerations ......................................... 5
   7. References .................................................. 5
      7.1. Normative References.................................... 5
      7.2. Informative References.................................. 6
   Authors' Addresses ............................................. 7

1. Introduction

   Hierarchical SFC is a network architecture for supporting service
   function chains across multiple geographically dispersed networks.
   Hierarchical SFC is described in detail in [I.D. dolson-sfc-
   hierarchical] and [I.D.ao-sfc-for-dc-interconnect], and is not
   repeated here.

   In hSFC, SFs in top-domain can be logical and composed of several
   more refined SFs in sub-domain. Therefore, it is necessary to check
   the availability of those logical SFs in the procedure of
   orchestration.

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   This document proposes that adding an east-west interface for
   coordination among different control planes of separate SFC-enabled
   domains so to supporting hierarchical service orchestration.

  1.1. Assumptions

   The following assumptions are made:

   o A Hierarchical SFC-enabled network has multiple level network
      domains. Each domain has their own control plane and data plane.
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