Software Defined Networking: The Next Big Thing. Copyright 2013 Tech Mahindra. All rights reserved.

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2 Software Defined Networking: The Next Big Thing 2

3 Speakers Girish Homkar Product Architect Rajesha Technical Architect Thomas Lee Sebastian Technology Consultant 3

4 Webinar Format Each presenter will speak for about 10 minutes followed by open house for Q&A session for 20 minutes. How can you participate with us today The Q&A will be open in the last 20 minutes of the Webinar o Type in your Questions as they come to you in the Question Box addressing it to the STAFF, during the course of the Webinar. o During the Q&A session, the Presenters will take one question at a time and respond. o The Questions which may not get answered due to paucity of time, will be responded in the . 4

5 Agenda Software Defined Networking & why it is the next big thing in the evolution of communication networks The need for SDN The SDN architecture, its benefits & challenges Tech Mahindra s offering for SDN portfolio 5

6 Why are we discussing SDN? VMware acquires Nicira for $1.26 Billion Cisco answers SDN with ONE and onepk APIs Big Switch Networks reports 6000 downloads of Controller SDN market will grow from current $198 million to $2.1 billion in

7 What spurred the need for a change? Silos of Infrastructure due to lack of interoperability. Shifting of the burden onto the Service Providers. Routing, management, mobility management, access control, VPNs, Million of lines of source code (6000 RFCs) Billions of gates Scalable Resilient High Availability Interoperable Flexible... Platform Bloated Power Hungry 7

8 Configurability issue of present networks Control plane: Distributed algorithms Management plane: Human time scale Collect measurements and configure the equipment Data plane: Packet streaming Track topology changes, compute routes, install forwarding rules Forward, filter, buffer, mark, rate-limit, and measure packets No complete topology Per packet based forwarding Difficult to provide logical grouping, Access control and Quality of Service 8

9 Challenges of Service Providers Innovation in compute, storage technologies outpaced that in networking Massive user groups, enterprises with diverse business requirements Optimized / dynamic resource provisioning Exponentially growing bandwidth demand (doubling every year) Need to lower CAPEX and OPEX by 30% per year. In reality 10% reduction 9

10 Need of Service Providers Easily configurable or rather programmable! Dynamically responding to traffic patterns Scalable solutions for increasing bandwidths Extendable solutions from small to large networks Mobility across networks of users and services Virtualization of the networks providing isolation for security, performance 10

11 SDN architecture 3. Well-defined open API App App App 2. At least one good operating system Extensible, possibly open-source Network Operating System 1. Open interface to hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Source: ONF 11

12 How SDN brings in vendor interoperability? Symmetric messages Hello Echo request / reply Experimenter OpenFlow Controller Controller messages Packet-out Handshake Multipart Configuration Modify state Role request Barrier Ethernet Control Path Switch/Router (Software) OpenFlow Data Path (Hardware) Asynchronous messages Packet-in Flow removed Port status Error 12

13 Isolated slices How SDN provides network virtualization? Feature Feature Feature Feature Network Operating System 1 Network Operating System 2 Network Operating System 3 Network Operating System 4 OpenFlow Virtualization or Slicing Layer OpenFlow Packet Forwarding Packet Forwarding Packet Forwarding Packet Forwarding Source: ONF Packet Forwarding 13

14 Simplified architecture of NE (Switch) in SDN Software Layer OpenFlow Firmware Flow Table src dst Src Dst sport dport Action Controller Hardware Layer * * * * * port 1 port 1 port 2 port 3 PC

15 OpenFlow in Action A Flow is the fundamental unit of manipulation within a switch (as against frame in L2-bridging and datagram in L3-routing) Controller Routing Rule Action Statistics OpenFlow Protocol Rule Action Statistics Rule Action Statistics 15

16 A flow table entry Rule Action Stats Packet + byte counters 1. Forward packet to port(s) 2. Encapsulate and forward to controller 3. Drop packet 4. Send to normal processing pipeline 5. Modify Fields Switch Port VLAN ID src dst + mask what fields to match Eth type Src Dst Prot sport dport 16

17 OpenFlow is Backward Compatible Ethernet Switching Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action * Routing * 00:1f:.. * * * * * * * port6 Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action * * * * * * * * * port6 Application Firewall Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action * * * * * * * * * 22 drop 17

18 OpenFlow allows layers to be combined Flow Switching Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action port3 00:2e.. 00:1f vlan port6 VLAN + App Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action * * * * vlan1 * * * * 80 port6, port7 Port + Ethernet + Switch Port src dst Eth type VLAN ID Src Dst Prot sport dport Action port3 00:2e.. * 0800 * * * * port 10 18

19 Current Status of SDN Started as research projects at Stanford and now ITU is considering standardization of network virtualization and SDN. OpenFlow (current version 1.3) standardized by Open Networking Forum Companion standard OF-config XML based for configuration and management of openflow Growing SDN Community A lot of open source implementation / experimentation happening but full-blown production implementation available from few vendors only. 19

20 SDN Applications Converged transport and packet network. Network load balancing Network security by access control, traffic isolation Simplified MPLS traffic engineering and Virtual Private Networks Mobility and handoff management Virtual Machine migrations across networks Dynamic network programming and management Experimentation of new, user-defined routing protocols Energy management across networks Source: ONF 20

21 SDN Deployment Scenarios Beneficiaries of SDN - Campus networks, cloud computing, data centers, storage networks, social networking, business / financial applications! Deployment will start with small scale / partitioned / isolated private networks and successes will result in merging the networks to form bigger networks. Brownfield installations - The existing NE will be upgraded to have implementation of SDN / openflow and option to enable it. Wide-spread deployment in public / core networks will take some time, after which only the practical issues of SDN will emerge and SDN may mature. 21

22 Challenges that SDN may face Experimental networks are fine but real test is in production networks. Cost openflow Switch + controller < Legacy Network Element Interoperate with existing network elements in brown-field infrastructure. Cope up with complex capabilities - Switching, Routing, Admission Control, Queuing, Quality Of Service, Encapsulation, Affirmative Service Guarantees Scalable in terms of users, transactions, routes, servers and networks. Performance meet varying and increasing load conditions within available resources (memory / processing) Dynamic fault tolerance controllers ability to receive fault info and switchover traffic Competition from newer emerging technology e.g. IEEE s Shortest Path Bridging protocol 22

23 Audience Poll 23

24 High level architecture of SDN Switch Discovery App QoS App Controller (control plane) Network Operating System (data plane) Security App Bridging App Routing App OpenFlow Controller OpenFlow OpenFlow Interpreter Port manager ports Multicast App Open APIs Hardware abstraction APIs Hardware driver Table manager Flow table Data Base Controller runs Networking Operating System. Linux can be used. openflow Controller provides open APIs for use by applications to provide services in discovery, bridging, routing, multicast, security, QoS etc. openflow controller stores configurations in a persistent database. openflow controller manages multiple flows in an Ethernet switch using openflow protocol. (implementation based on Linux open source: NOX/POX) openflow interpreter in Ethernet switch converts openflow messages to hardware control message using hardware abstraction APIs (implementation based on Linux open source: openvswitch) Hardware fast path processing (specific to hardware type) has port manager to control ports and table manager to lookup hardware flow table and manage flow entries. 24

25 High Level SDN Architecture APPLICATIONS Network Loop Detector Dynamic QoS Manager MPLS-TP PW Manager Network OPEN API L2-Data Plane Service API L3-Dataplane Service API Security Service API Infra Service API O V S VM1 (TECHM CARSS STACK) VM2 (TECHM CARSS STACK) VMn (TECHM CARSS STACK) Open Flow Client Open Flow Interface Dynamic Controller I N F R A M G R Data Base Initial release to build SDN platform is for Carrier Ethernet network and Routing Domain Basic building block of SDN solution are openflow, TechM CARSS solution and Linux Virtual M/c OpenFlow Interpreter OpenFlow Interpreter Fast Path OpenFlow Interpreter Each VM runs control-plane for individual instance of Fast Path Open source OpenVswitch stack is used for better performance and used as switching instance across VM instances Fast Path Fast Path 25

26 Tech Mahindra s offering for SDN portfolio SDN Infrastructure Development OpenFlow Controller OpenFlow Stack Hardware Abstraction layer SDN Applications Development Applications for Carrier Ethernet and Packet Optical Transport. Configuration tools 26

27 Product Engineering Services Division A Snapshot Overview R&D arm of Tech Mahindra with focus on TEM, TSP & ISV segment Telecom R&D Engineers Development centers in India: Bangalore, Chennai, Noida Technology Focus Optical Transport Networks (SONet / SDH, DWDM) Broadband Access Networks (xdsl, xpon, CMTS) Datacom (L2/L3) Technologies Wireless Networks (CDMA, LTE, WiMAX, WiFi) NMS / EMS, Network Testing Hardware and Embedded Engineering Voice Switching & Signaling (legacy and next gen) Centers of Excellence Developing solutions in emerging technologies such as SDN, OTN, LTE 27 27

28 Product Engineering Offerings Product Lifecycle Management New feature development Product design / coding / testing Product life cycle extension Field support & sustenance Training content Development Deployment & Integration services Program Management Technical Publications Network Services & Testing Life cycle testing Test automation Network Integration E-2-E, Non-functional testing Solution/System integration NMS / EMS Development HW & SW Development HW Board Development Embedded SW / Firmware Full System Development Application Development Portal, Tools, Driver, L2/L3 protocol Technical Consultancy & Solutioning Technology Transformation Addressing new markets Interoperability & compliance New technology adoption Migration / Transfer engineering Optical, Access & Datacom Broadband Wireless Wireless & Wireline Core Mobility Hardware & Embedded Multimedia Services Network Services End-to-end Offerings for New Product Introduction & Realization : From Concept to Support 28

29 Audience Poll 29

30 Q&A 30

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