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Versions: 00                                                            
<NFV Research Group>                                     Truong-Xuan Do
Internet Draft                                             Younghan Kim
Intended status: Informational               Soongsil University, Korea
Expires: April 2017                                        Oct 30, 2016




          Use cases for policy-based resource management in VNF-FG
         draft-xuan-nfvrg-policy-resource-man-vnffg-usecase-00


   Abstract

   This document describes two use cases for policy-based resource
   management in VNF-FG. These two use cases are not covered by two
   documents [irtf-nfvrg-resource-management] and
   [irtf-nfvrg-policy-based-resource-management]. These two use cases
   considers service plan policies in VNF-FG placement and affinity
   policies in Network forwarding path update.


   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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   This Internet-Draft will expire on April 2017.




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   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.



   Table of Contents

   1. Introduction...................................................3
   2. Conventions used in this document..............................3
   3. Policy-based resource management for VNF-FG....................4
   4. Alignment with policy-based resource management document.......5
   5. Security Considerations........................................5
   6. IANA Considerations............................................5
   7. References.....................................................5
      7.1. Normative References......................................5
      7.2. Informative References....................................5





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1. Introduction

   In this document, two additional use cases are discussed on policies
   which affect the resource management operations for VNF-FG. These
   policies include service plan policies for customer in case of
   VNF-FG placement and update. Another is affinity policies for VNF-FG
   update.




2. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC-2119 [RFC2119].


    The terms about VNF-I, VL, VNF-FG, classifers and MANO are defined
    in [RFC7665] and [ETSI-NFV-MANO]




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3. Policy-based resource management for VNF-FG

VNF-FG is composed of an ordered sequence of VNFs which provides a
specific services. A network forwarding path (NFP) is an instance of
VNF-FG. NFP is composed by VNF intances (VNF-I), virtual links (VL),
virtual switches (vSW or forwarder), and traffic classifiers. The
NFP composition depends on the resource states, such as availability,
engergy consumption of VNF-I and bandwidth, latency of VL. Two resource
management oprations related to VNF-FG are NFP placement and NFP
update. In the document [irtf-nfvrg-resource-management], some use
uses for resource management include fail-over, load-balancing,
path optimizaton, and engergy efficiency. Here, we present another
use case for policy-based resource management, i.e. service plan.

Service plan: depending on the service plan of each customer,the
NFP will allocated which takes into account the QoS parameters.
For example, a customer with Gold service plan will be served
by the NFP which consists of VNF-I, VL, vSW, and traffic classifiers
satisfying the QoS parameters of that Gold plan.

+---------------------------------------------------------------+
| Policy: "A customer with a Gold service plan"                 |
+------+----------------+----------------+-----------------+----+
       +                +                +                 +
       V                V                V                 V
+-------------+  +------------+   +------------+   +------------+
|Compute      |  | Network    |   | Network    |   |Classifier  |
|subsystem    |  | subsystem  |   | subsystem  |   |            |
|             |  |            |   |            |   |            |
|Policy       |  |Policy      |   |Policy      |   | Policy     |
|translation: |  |translation:|   |translation:|   | Translation|
|             |  |            |   |            |   |            |
|Selected     |  |Selected    |   |Selected    |   |Selected    |
|VNF-Is       |  |vSWs        |   |VLs         |   |classifers  |
|has low      |  |has strong  |   |has low     |   |has strong  |
|working load |  |capacity    |   |latency     |   |capacity    |
|low latency  |  |            |   |            |   |            |
|             |  |            |   |            |   |            |
+-------------+  +------------+   +------------+   +------------+

                 Figure 2. Policy-based NFP placement

+ Affinity and anti-affinity policies: the NFP is updated which
takes into account the affinity or anti-affinity policies. For example,
when a VNF-I in the NFP fails, the replacement VNF-I should satisfy
some anti-affinity policies defined by network operators for achieving
the resiliency. That is, the replacement VNF-I and failed VNF-I
instances should be located in the different physical hosts or
hypervisors or NFVIs.


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4. Alignment with policy-based resource management document

This document provides two additional examples of policies for resource
management operations of VNF-FG.

5. Security Considerations
TBD.

6. IANA Considerations

TBD.

7. References

7.1. Normative References


    [ETSI-NFV-MANO]
              ETSI, "Network Function Virtualization (NFV) Management
              and Orchestration V1.1.1", Dec 2014.

    [RFC7665]
             IETF, "Service Function Chaining architecture", RFC7665

7.2. Informative References

    [irtf-nfvrg-policy-based-resource-management]
              R. Szabo, Ed. "Policy-based Resource Management"
              draft-irtf-nfvrg-policy-based-resource-management-01,
              Jul 2016

    [irtf-nfvrg-resource-management]

              Lee, S., Pack, S., Shin, M., and E. Paik, "Resource
              Management in Service Chaining", draft-irtf-nfvrg-
              resource-management-service-chain-03, Mar 2016.

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Authors' Addresses

   Truong-Xuan Do
   Soongsil University
   Changui Bldg. 403,
   (156-743) 511 Sangdo-Dong, Dongjak-Gu, Seoul, Korea

   Phone: +82 10 4473 6869
   Email: thespring1989@gmail.com


   Younghan Kim
   Soongsil University
   11F Hyungnam Engineering Bldg. 1107,
   (156-743) 511 Sangdo-Dong, Dongjak-Gu, Seoul, Korea

   Phone: +82-2-820-0904
   Email: younghak@ssu.ac.kr































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