Software Defined Networking and Network Functions Virtualization The Next Big Thing in Networking
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1 Software Defined Networking and Network Functions Virtualization The Next Big Thing in Networking Dirk Kutscher, Fabian Schneider NEC Laboratories Europe, NEC Europe Ltd.
2 Acknowledgement this presentations is based on the work of other reseachers at NLE, namely Hans-Jörg Kolbe, Saverio Niccolini, Felipe Huici, Jürgen Quittek, Heiner Stüttgen and many others Page 2 NEC Europe Ltd. 2013
3 What are we talking about SDN Allows programming the network by separating control and data planes NFV Consolidate plethora of divers network elements onto COTS servers, switches & storage Complementary to SDN, but not dependent SDN is a whole Eco-system: SDN Apps Network OS Data paths Page 3 NEC Europe Ltd. 2013
4 Expectations of Telecom Operators Automate control OPEX reduction Software Open community New innovative services by 3 rd party Network Appliance + Centralize Network Services Network Device Decouple Commodity HW CAPEX reduction, Space, Power reduction Standard interface Avoid Vendor Lock-in Source : Page 4 NEC Europe Ltd. 2013
5 HOW TO DO SDN? WELL, OPENFLOW Page 5 NEC Europe Ltd. 2013
6 OpenFlow: Full Control over Flow Routing Back to the roots: communication between endpoints create a flow 1. OpenFlow is based on an abstract switch model enabling the separation of control and data 2. OpenFlow deals with IP-flows, rather than IP packets 3. OpenFlow allows to control flow path routing end-to-end 4. OpenFlow allows to implement services inside the network Industry Standard Controller Apps Apps Apps (1) Flow 1 Flow 2 Application 1 Application 2 Switch (2) One sided flow Application 1 Application 2 Server (2) Capable of maintenance (1) (3) Firewall Load balancer Page 6 NEC Europe Ltd. 2013
7 HOW TO DO NFV? WELL, OPENSTACK (& KVM, XEN, ) Page 9 NEC Europe Ltd. 2013
8 OpenStack: Cloud Management can deal with VMs SGSN/ GGSN BRAS Message Router PE Router NFV Orchestration CDN DPI CG NAT WAN Accelerator Page 10 NEC Europe Ltd. 2013
9 SO, ARE WE DONE YET? Page 11 NEC Europe Ltd. 2013
10 Unfortunately NOT! Good news for researchers, still a lot to do OpenFlow is only a part of SDN Protocol has some restrictions / is bound to existing protocols Hard to introduce new networking paradigms (ICN, LISP, DTN,...) No support for L5-7 matching (DPI, HTTP proxies, application LBs,...) Open app eco-system needs standardized north-bound interfaces Network OS needed, some efforts en route (OpenDaylight, ONF,...) Requirements/Framework for SDN apps unexplored NFV needs more than OpenStack Data Plane Performance of virtualized NWEs Orchestration, incl. Security and Privacy in virtualized NWs Service Chaining Page 12 NEC Europe Ltd. 2013
11 Same Execution Context Same Execution Context Framework/Execution Environment for SDN Apps Local and/or remote Apps Locate/ Discover Controller Communicate with Locate/ other components? App 4 Discover NBI type App 5 App 6 Migrate? Clone? Communicate? Forward data after migrate? New contact after migrate? Communicate with outside? App 1 App 2 Northbound Interfaces SDN controller instance 1 Southbound Interfaces App 1 App 2 Northbound Interfaces SDN controller instance 1 Southbound Interfaces Page 13 NEC Europe Ltd. 2013
12 How to orchestrate VM and network control OpenStack Model VM Mgmt cannot use info from networking Orchestration SDN controller Orchestration VM Mgmt Interfaces do not yet exist Orchestration VM Mgmt network compute /storage SDN controller SDN controller Complex Orchestration; Lots of info exchanged VM Mgmt network compute /storage Need to explore pros and cons! network compute /storage Page 14 NEC Europe Ltd. 2013
13 Network service chaining Issues with service chaining: Network-wide labels NFs need to be label aware Requires changes to the OS network stack of the NF Input traffic output network function (header rewriting) How to identify traffic again on egress One chain requiring multiple passes through same network element How differentiate the different stages in the chain? How to carry various info from beginning of chain to NF in the middle? Many different use cases way different requirements: e.g. VNFs need access to arbitrary app/user meta data Different from packet labeling Needs a systematic approach: NEC looking into this OF/SDN can help; NSC frameworks should leverage OF/SDN Page 15 NEC Europe Ltd. 2013
14 SOME OF OUR LABS RESEARCH ON SDN/NFV Page 16 NEC Europe Ltd. 2013
15 SDN/NFV research in NLE Enabling high-performance virtual network functions FlashSwitch: Data plane performance of vswiches ClickOS: Framework for easy development of high performance VNFs Moving NFs into the Cloud vbras, vepc, vcpe, vcgnat Mobile Cloud Networking (MCN EU project) Reliability and Security (SECCRIT EU project) SDN++ Network OS: Execution Framework for SDN applications New limits in SDN: Flow table size and speed ICN over SDN Building network infrastructure for SDN (OFELIA EU project) Page 17 NEC Europe Ltd. 2013
16 vbras Example: Broadband Access Network subscribers HGW DSLAM DC services HGW BRAS EDGE ROUTER HGW DSLAM HGW IP PPP PPPoE Ethernet+VLAN SDH/PDH (DSL) IP Ethernet SDH, WDM,. aggregation network core network (IP) Internet Page 18 NEC Europe Ltd. 2013
17 Broadband Access Server Functions PPPoE/PPP sessions management Header encapsulation/decapsulation Interface to AAA Traffic shaping Access control ARP proxy IP Forwarding IP addresses assignment IGMP processing Page 19 NEC Europe Ltd. 2013
18 Broadband Access Server Expensive Monolithic architecture Single point of failure Hard to change First sessions tunnels termination point One ideal target for a NFV/SDN solution! Page 20 NEC Europe Ltd. 2013
19 Software BRAS Optimization of virtualization COTS device/ blade server NASS Module (PPP) Indiv. FW & rate limit PPPoE NASS Module (PPP) Indiv. FW & rate limit VPN Routing Global Firewall Rate Limit per Access Node FW NASS Module (PPP) Indiv. FW & rate limit Traffic Shaper NASS Module (PPP) Indiv. FW & rate limit SW-defined NW Functions Page 21 NEC Europe Ltd. 2013
20 ClickOS-based BRAS VNF Implemented high performance PPP termination With commodity IT technology Memory is not an issue; System can scale: Memory required for 1M sessions: 1.5 GB Memory required for 65k sessions: <100MB Distributing sessions to multiple VMs in one server leads to same results Session setup rates are enormous Rate is >>1000 PPP sessions/s. Throughput snapshot as of today 10Gbps >512bytes/packet More than 2M packets per second Conclusion: Virtualizing BRAS functions is feasible while delivering required performance all measurements made on a single PC, Intel i7, 3,2GHz, 6 cores, 4GB RAM Page 22 NEC Europe Ltd. 2013
21 SUMMARY Page 23 NEC Europe Ltd. 2013
22 Summary and Outlook Virtualization is entering the network arena SDN applies the IT server cloud service paradigm to networking Network virtualization can be applied to data and control plane SDN holds the promise to reduce NW Operator s and data center operator s CAPEX allowing the use of commodity HW through NFV SW based NW (re-)configuration, including scale-in/scale-out for services (e.g. virtualized mobile core vepc, SW-BRAS, ) NW Operator OPEX through a better support Flexible, on-demand in-network node processing to support NW control Provides SW controlled flexibility of the NW infrastructure to support dynamic changes in networking requirements and demand Although the SDN principle seems to be agreed by the industry many research issues remain: Data plane performance, Network OS, Security/Privacy, Management/Orchestration, Page 24 NEC Europe Ltd. 2013
23 Some Related Links NEC SDN solutions NEC s ProgrammableFlow Video or search for NEC OpenFlow on YouTube OFELIA Testbed Check out the video and the Trema Tutorial there! NEC Labs Europe OpenFlow site NEC s Open Source Controller Trema ONF and ETSI NFV Page 25 NEC Europe Ltd. 2013
24 Page 26 NEC Europe Ltd. 2013
25 BACKUP Page 27 NEC Europe Ltd. 2013
26 Open Source Activities Controllers ICSI NOX (C, Python) Stanford Beacon (Java) NEC trema (C, Ruby) BigSwitch Floodlight (Java) NTT Ryu (Python) Software Switches Open vswitch (in Linux 3.3) Indigo (abstraction layers to support OF on physical/hypervisor switches) Page 28 NEC Europe Ltd. 2013
27 OpenFlow in OpenStack Page 29 NEC Europe Ltd. 2013
28 OpenDaylight Facilitate a community-led, industry-supported open source framework, including code and architecture, to accelerate and advance a common, robust SDN platform Page 30 NEC Europe Ltd. 2013
29 NEC RESEARCH AND NLE Page 31 NEC Europe Ltd. 2013
30 NEC s Global R&D NEC Laboratories America (Princeton, Silicon Valley, U.S.A.) Media Analytics, Machine Learning System Mgmt and Verification Energy Management IT System Architecture Broadband and Mobile Networking Quantum IT NEC Laboratories China (Beijing, China) Video Surveillance and Sensing Data Mining Cloud ICT Wireless Access NEC Laboratories Europe (Heidelberg, Germany & S.Ruislip, UK) Future Networks, SDN Security and Privacy Media Processing Cloud ICT M2M and IoT ITS Smart Energy Standardization C&C Innovation Initiative Information and Media Processing Labs (Ikoma,Nara) User Interface Information and Media Processing Smart Energy Research Labs. (Sagamihara, Kanagawa) Energy Component Smart Energy Research Labs. Green Platform Research Labs. (Tsukuba,Ibaraki) Energy Component Functional Material Low Power Device C&C Innovation Initiative Knowledge Discovery Research Labs. Cloud System Research Labs. Information Media Processing Labs. Smart Energy Research Labs. Green Platform Research Labs. (Tamagawa, Kanagawa) Knowledge Discovery ICT System Information and Media Processing Communication, Processing and Sensor / Actuation Platforms Energy Management R&D Marketing Page 32 NEC Europe Ltd. 2013
31 NEC Laboratories Europe - Overview ~100 leading researchers from all over Europe and world-wide in Heidelberg, and London (NEC E HQ) Close links with leading European research institutes & universities Collaboration with major industry in Europe, e.g., network operators, ICT vendors, automotive, utilities. Research areas in NLE 4G/5G, Future Internet, SDN Cloud platform, management & services Security, Privacy & Performance Internet of Things (M2M) ITS and Green Telematics Smart Energy Standardization Page 33 NEC Europe Ltd. 2013
32 NLE s Mission Research & Development & Standardization & Marketing 1. Develop key technologies and solutions for NEC s business Technology areas: network, security, M2M and media services, energy and transport software technologies for the future cloud environment addressing in particular European market trends and requirements leveraging European strengths through open innovation projects with customers and technology partners 2. Impact standardization to strengthen NEC s solutions Insert NEC technologies and (essential) IPR into evolving standards Focus on 3GPP, IETF, BBF, IEEE 802, ONF, ETSI NFV, Support European Sales and Marketing Future technology demonstrators for European trade fairs Provide consulting and trial support to customers and NEC E s CoCs with technical expertise Page 34 NEC Europe Ltd. 2013
33 NEC Group Vision 2017 To be a leading global company leveraging the power of innovation to realize an information society friendly to humans and the earth Page 35 NEC Europe Ltd. 2013
34 Page 36 NEC Europe Ltd. 2013
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