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 Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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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 Expires April 30,2017 [Page 2]  Internet-Draft Oct 30,2016 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] Expires April 30,2017 [Page 3]  Internet-Draft Oct 30,2016 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. Expires April 30,2017 [Page 4]  Internet-Draft Oct 30,2016 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. Expires April 30,2017 [Page 5]  Internet-Draft Oct 30,2016 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 Expires April 30,2017 [Page 6]