NVO3 WG Z. Chen Internet-Draft China Telecom Intended status: Standards Track T. Ao Expires: January 4, 2018 ZTE Corporation July 3, 2017 Flow split in Metro Area Network draft-aoch-nvo3-flow-split-00.txt Abstract In the future, there will be some new application appeared known as 4K/8K high quality video or VR/AR application.These application needs high bandwidth and low lantacy.In order to meet these requirements, the flow model of traditional MAN should be changed. This article describes a new device using in MAN to support spliting DC's and Internet's flow, support to build edge DC in MAN and change MAN flow model from pipe type to umbrella type. 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. 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Code Components extracted from this document must Chen & Ao Expires January 4, 2018 [Page 1] Internet-Draft Flow split in Metro Area Network July 2017 include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. Device model . . . . . . . . . . . . . . . . . . . . . . . . 2 4. Functionality . . . . . . . . . . . . . . . . . . . . . . . . 3 4.1. Forward and shunt . . . . . . . . . . . . . . . . . . . . 3 4.2. Interface . . . . . . . . . . . . . . . . . . . . . . . . 3 4.3. Other Function . . . . . . . . . . . . . . . . . . . . . 4 4.3.1. PUPVPVxLAN function . . . . . . . . . . . . . . . . . 4 4.3.2. Leaf switch function . . . . . . . . . . . . . . . . 4 4.3.3. VxLAN smart mapping to VxLAN . . . . . . . . . . . . 4 4.3.4. QoS function and rating limiting in VxLAN . . . . . . 4 4.3.5. EVPN protocol . . . . . . . . . . . . . . . . . . . . 4 4.3.6. DHCP snooping and relay function in VxLAN tunnel . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 7. Information References . . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction This document describes a type of device using in Metro Network to distribute the user's flows,and forward them to different direction of MAN. Service Provider can use this device to separate the valuable flow from Internet flow,and redirect the flow to the edge cloude.such as 4K/8K video or AR/VR application. 2. Terminology FSD(Flow Split Device): device to split user flow according to the control flow table, include forwarding plane and stack module. 3. Device model FSD equipment's model is described as below. Chen & Ao Expires January 4, 2018 [Page 2] Internet-Draft Flow split in Metro Area Network July 2017 +----------------+ +-----------------+ | stack module +---> | SDN controller | | | | | +-------+--------+ +--------+--------+ ^ | | +-----------------+ | | | ^ +--------+-----+--+ | forwarding plane| +----------------> +------------> | | +-----------------+ +----------------> The forwarding plane is the datapath of the FSD. Before it working ,its forwarding table will be configurated by the SDN controller with NATCONF or OFPCONFIG protocol. User's data flow is sended to the forwarding plane. In normal condition, the flow will be forwarded according to the preconfig table in the forwarding plane. 4. Functionality 4.1. Forward and shunt Forward and shunt For Internet flow,the packet will be forwarded by FSD according to pre configuration flow table. The capacity of flow table is a big problem to the shunt device if using MAC address forwarding. In a large Metro network the number of the items of flow table maybe up to one million, so the C/S VLAN(QinQ) forwarding function will be considered to reducing the capacity of the flow table. For local flow,which is disposed in the edge cloud, should be shunted in the FSD according to the dynamical flow table. The protocol such as openflow should be supported to create the dynamical forwarding flow table. 4.2. Interface VxLAN tunnel should be supported in the uplink of the FSD to the edge cloud direction, and IP interface should be supported in the uplink to the Internet direction. In other word, FSD will separate the east-west flow and south-north flow of the access network. Chen & Ao Expires January 4, 2018 [Page 3] Internet-Draft Flow split in Metro Area Network July 2017 There are three kinds of interface should be supported in the downlink of the FSD, VLAN interface,QinQ interface and VxLAN interface. VLAN interface is for enterprise subscriber to access in, QinQ interface is for internet user,and VxLAN tunnel interface is for some VxLAN private line service. 4.3. Other Function Many other functions should be supported in FSD for different requirements,as below: 4.3.1. PUPVPVxLAN function For user isolation and VxLAN internal flow statistic and charging. 4.3.2. Leaf switch function for realize the leaf-spine frame in DC Downlink port VLAN,QinQ, 4.3.3. VxLAN smart mapping to VxLAN in uplink port for packet forward 4.3.4. QoS function and rating limiting in VxLAN for Forwarding priority and service control in VxLAN 4.3.5. EVPN protocol for the information synchronization in layer2 network 4.3.6. DHCP snooping and relay function in VxLAN tunnel and so on... 5. Security Considerations Service Gateway must have the capability of checking the validation of user's address. 6. IANA Considerations N/A Chen & Ao Expires January 4, 2018 [Page 4] Internet-Draft Flow split in Metro Area Network July 2017 7. Information References [I-D.ietf-nvo3-arch] Black, D., Hudson, J., Kreeger, L., Lasserre, M., and T. Narten, "An Architecture for Data Center Network Virtualization Overlays (NVO3)", draft-ietf-nvo3-arch-08 (work in progress), September 2016. [I-D.ietf-nvo3-use-case] Yong, L., Dunbar, L., Toy, M., Isaac, A., and V. Manral, "Use Cases for Data Center Network Virtualization Overlay Networks", draft-ietf-nvo3-use-case-17 (work in progress), February 2017. [RFC7365] Lasserre, M., Balus, F., Morin, T., Bitar, N., and Y. Rekhter, "Framework for Data Center (DC) Network Virtualization", RFC 7365, DOI 10.17487/RFC7365, October 2014, . Authors' Addresses Zhonghua Chen China Telecom No.1835, South PuDong Road Shanghai 201203 China Phone: +86 18918588897 Email: 18918588897@189.cn Ting Ao ZTE Corporation No.889, BiBo Road Shanghai 201203 China Phone: +86 21 68897642 Email: ao.ting@zte.com.cn Chen & Ao Expires January 4, 2018 [Page 5]