DMM S. Jeon Internet-Draft Instituto de Telecomunicacoes Intended status: Standards Track Y. Kim Expires: January 7, 2016 Soongsil University July 06, 2015 Deployment Models for Distributed Mobility Management draft-sijeon-dmm-deployment-models-00.txt Abstract This document briefly presents available deployment models for distributed mobility management networks, being consisted of mobility management functions: anchoring function, location management, and forwarding management functions defined in RFC7429. Some of the functions are modified on a need to allow potential deployment scenarios support. 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). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. 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Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Jeon & Kim Expires January 7, 2016 [Page 1] Internet-Draft Function Deployment Models for DMM July 2015 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions and Terminology . . . . . . . . . . . . . . . . . 2 3. Deployment Models . . . . . . . . . . . . . . . . . . . . . . 3 3.1. D1: Distributed AM, LM, and FM (with centralized LM) - All-in-One . . . . . . . . . . . . . . . . . . . . . . . 3 3.2. D2: Distributed AF-DP, LM and FM with centralized AF-CP (+ LM) . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3. D3: Distributed AF-DP and FM-DP with centralized AF-CP, LM, and FM-CP . . . . . . . . . . . . . . . . . . . . . . 5 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5 5. Security Considerations . . . . . . . . . . . . . . . . . . . 6 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6 7. Normative References . . . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7 1. Introduction This draft briefly presents available deployment models, consisted of mobility management functions defined in [RFC7429], for distributed mobility management (DMM) networks. With the mobility management functions in [RFC7429], i.e. anchor function (AF), location management function (LM), and forwarding management function (FM), centralized mobility management solutions such as Mobile IP (MIP), Hierarchical Mobile IPv6 (HMIPv6), and Proxy Mobile IPv6 (PMIPv6) have been described and decomposed by functional aspects, trying to analyze gaps from distributed mobility management requirement [RFC7333]. In this draft, with the functions, we sketch and describe the deployment models for distributed mobility management networks, accommodating the possible DMM solutions as well as providing an insight to understand the potentials of DMM. We also describe where the presented deployment models are substantiated with solution proposals submitted in DMM WG. 2. Conventions and Terminology 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 [RFC2119]. Following terms come from [RFC7429] with modified definition in the AF. Anchoring Function (AF) is defined as a combined control-plane and data-plane functions. For the control-plane function, it allocates an IP address, i.e., Home Address (HoA), or prefix, i.e., Jeon & Kim Expires January 7, 2016 [Page 2] Internet-Draft Function Deployment Models for DMM July 2015 Home Network Prefix (HNP) a mobile node, topologically anchored by the advertising node. That is, the anchor node is able to advertise a connected route into the routing infrastructure for the allocated IP prefixes. It also takes a data-plane anchor point where packets destined to the IP address or IP prefix allocated by the anchor should pass through. It can be deployed in a decoupled way, i.e. separated control plane and data plane. In that case, following two terms - AF-CP and AF-DP - are used. AF-CP is responsible of allocating the IP address and advertising a connected route for an associated terminal while AF-DP is responsible of anchoring received data packets destined to the IP address allocated by the anchor. Internetwork Location Management (LM) is a control-plane function, which manages and keeps track of the internetwork location of an MN. The location information may be a binding of the advertised IP address/prefix, e.g., HoA or HNP, to the IP routing address of the MN, or it may be a binding of a node that can forward packets destined to the MN. Forwarding Management (FM) function performs packet interception and forwarding to/from the IP address/prefix assigned to the MN, based on the internetwork location information, either to the destination or to some other network element that knows how to forward the packets to their destination. Following the FM definition in [RFC7429], it may be split into the control plane (FM- CP) and data plane (FM-DP). 3. Deployment Models We specify and analyze expected use cases where the MN tries to initiate an application. 3.1. D1: Distributed AM, LM, and FM (with centralized LM) - All-in-One Jeon & Kim Expires January 7, 2016 [Page 3] Internet-Draft Function Deployment Models for DMM July 2015 +--------------------------+ | (LM) | +--------------------------+ ^ ^ | | | | v v +-------------+ +-------------+ |AF + LM + FM | (<---->) |AF + LM + FM | +-------------+ +-------------+ +------+ | MN | +------+ Figure 1. Distributed AM, LM, and FM functions (with centralized LM) In this deployment model, AF, LM, and FM functions are co-located in every mobility router deployed at edge. This model can be called All-in-One for DMM. Depending on the use of the central LM, the model can be distinguished into fully distributed or partially distributed. Solutions following the given model are presented in [I-D.seite-dmm-dma][I-D.bernardos-dmm-pmip]. 3.2. D2: Distributed AF-DP, LM and FM with centralized AF-CP (+ LM) +--------------------------+ | AF-CP (+ LM) | +--------------------------+ ^ ^ | | | | v v +-----------+ +-----------+ | AF-DP | | AF-DP | | LM + FM | (<----->) | LM + FM | +-----------+ +-----------+ +------+ | MN | +------+ Figure 2. Distributed AF-DP, LM and FM functions with centralized AF-CP (+ LM) Jeon & Kim Expires January 7, 2016 [Page 4] Internet-Draft Function Deployment Models for DMM July 2015 AF-DP is distributed with LM and FM into deployed mobility routers while AF-CP is centralized in a single entity. For an extensive scenario support, LM may be co-located with the AF-CP. AF-DP is determined by the AF-CP. One possible solution could be to use such as User-Plane Address option to deliver AF-DP IP address serving router or terminal should contact, as proposed in [RFC7389]. 3.3. D3: Distributed AF-DP and FM-DP with centralized AF-CP, LM, and FM-CP +--------------------------+ | AF-CP + LM + FM-CP | +--------------------------+ ^ ^ | | | | v v +---------------+ +---------------+ | AF-DP + FM-DP | (<--->) | AF-DP + FM-DP | +---------------+ +---------------+ +------+ | MN | +------+ Figure 3. Distributed AF-DP and FM-DP with centralized AF-CP, LM, and FM-CP In the model, separation of FM-CP and FM-DP is implemented with the separation of AF-CP and AF-DP. The LM is located at the central entity. Comparing D3 with D2, D3 can provide flexibility to make forwarding path between the AF-DP of an allocated IP address and the current serving router where the terminal is attached. [I-D.matsushima-stateless-uplane-vepc] may be subject to D3 model, control functions in vEPC delivers Route Update to EPC Edge Routers, to configure data-plane routing path. [I-D.ietf-dmm-fpc-cpdp] presents a framework that can facilitate forwarding policy configuration, based on D3 model, imparting a role and characteristics of a mobility router as well as configuring a forwarding path. 4. IANA Considerations This document makes no request of IANA. Jeon & Kim Expires January 7, 2016 [Page 5] Internet-Draft Function Deployment Models for DMM July 2015 5. Security Considerations T.B.D. 6. Acknowledgements 7. Normative References [I-D.bernardos-dmm-pmip] Bernardos, C., Oliva, A., and F. Giust, "A PMIPv6-based solution for Distributed Mobility Management", draft- bernardos-dmm-pmip-04 (work in progress), March 2015. [I-D.ietf-dmm-fpc-cpdp] Liebsch, M., Matsushima, S., Gundavelli, S., and D. Moses, "Protocol for Forwarding Policy Configuration (FPC) in DMM", draft-ietf-dmm-fpc-cpdp-00 (work in progress), May 2015. [I-D.matsushima-stateless-uplane-vepc] Matsushima, S. and R. Wakikawa, "Stateless user-plane architecture for virtualized EPC (vEPC)", draft- matsushima-stateless-uplane-vepc-04 (work in progress), March 2015. [I-D.seite-dmm-dma] Seite, P., Bertin, P., and J. Lee, "Distributed Mobility Anchoring", draft-seite-dmm-dma-07 (work in progress), February 2014. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC5213] Gundavelli, S., Leung, K., Devarapalli, V., Chowdhury, K., and B. Patil, "Proxy Mobile IPv6", RFC 5213, August 2008. [RFC7333] Chan, H., Liu, D., Seite, P., Yokota, H., and J. Korhonen, "Requirements for Distributed Mobility Management", RFC 7333, August 2014. [RFC7389] Wakikawa, R., Pazhyannur, R., Gundavelli, S., and C. Perkins, "Separation of Control and User Plane for Proxy Mobile IPv6", RFC 7389, October 2014. [RFC7429] Liu, D., Zuniga, JC., Seite, P., Chan, H., and CJ. Bernardos, "Distributed Mobility Management: Current Practices and Gap Analysis", RFC 7429, January 2015. Jeon & Kim Expires January 7, 2016 [Page 6] Internet-Draft Function Deployment Models for DMM July 2015 Authors' Addresses Seil Jeon Instituto de Telecomunicacoes Campus Universitario de Santiago Aveiro 3810-193 Portugal Email: seiljeon@av.it.pt Younghan Kim Soongsil University 369, Sangdo-ro, Dongjak-gu Seoul 156-743 Korea Email: younghak@ssu.ac.kr Jeon & Kim Expires January 7, 2016 [Page 7]