High Availability Mechanisms for Service Function Chaining
draft-xuan-nfvrg-ha-sfc-02

Document Type Active Internet-Draft (individual)
Last updated 2017-07-03
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
<NFV Research Group>                                     Truong-Xuan Do
Internet Draft                                             Younghan Kim
Intended status: Informational               Soongsil University, Korea
Expires:  Jan 2018                                          Jul 1, 2017

        High Availability Mechanisms for Service Function Chaining
                   draft-xuan-nfvrg-ha-sfc-02

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), 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/1id-abstracts.html
   
   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html
   
   This Internet-Draft will expire on Jan 2018.

Copyright Notice

   Copyright (c) 2014 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 (http://trustee.ietf.org/license-info)
   in effect on the date of publication of this document.  Please
   review these documents carefully, as they describe your rights
   and restrictions with respect to this document.

<Do, et al.>               Expires Jan 1,2018                  [Page 1]
Internet-Draft       <High availability for SFC>            Jul 1, 2017

Abstract

   In the NFV domain, the high availability for SFC is the combination
   of HA for individual service chain components and dynamic adjustment
   This document considers the high availability mechanisms for 
   service chain from the viewpoint of the interaction between virtual
   network function, virtual link, NFV-MANO, and NFVI.
   

Table of Contents

   1. Introduction...................................................3
   2. Conventions used in this document..............................3
   3. High availability of SFC.......................................4
      3.1. SFP adjustment............................................8
      3.2. High availability for VNF.................................5
         3.2.1 active standby........................................4
         3.2.2 active active.........................................5
                 3.2.3 load balancing........................................6
      3.3. High availability for NFV-MANO............................6
      3.4. High availability for service function forwarder..........6
      3.5. High availability for virtual link........................7
   4. Multisite considerations.......................................7    
   5. Security Considerations........................................8
   6. IANA Considerations............................................8
   7. References.....................................................8
      7.1. Normative References......................................8
      7.2. Informative References....................................8

<Do, et al.>               Expires Jan 1,2018                  [Page 2]
Internet-Draft       <High availability for SFC>            Jul 1, 2017 

1. Introduction

   Network function virtualization (NFV) offers a great flexibility, 
   CAPEX and OPEX reduction, and short time-to-market for provisioning
   network services in cloud environment. 
   
   For traditional networks, the service function deployments are 
   relatively static and are tightly coupled to network topology and
   physical resources. Therefore, the design of network service 
   availability is done hop by hop and the service of each hop is 
   configured and operated independently. There is no mechanism for
   managing the end-to-end service availability. In NFV, the service
   deployment is more dynamic, flexible, visible, and automated.
   The service function chain could be adjusted dynamically in case
   of failure. However, the interaction between the HA mechanisms for
   individual components and service chain has not been discussed yet.
   
   In this document, we considers the high availability mechanisms for
   individual virtual network functions, virtual link, service function
   forwarder, and interaction beetween those individual mechanisms 
   with the service chain adjustment.    
Show full document text