<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
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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
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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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