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Software Defined Networking (SDN) Technology Brief

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An overview of Software-Defined Networking (SDN) and the key benefits of moving to a virtualized network, including:

- Improved time to market through automation
- Optimal trafficking with a global view of the network
- Quicker enablement of new services
- Reduced operating costs
- Improved management and visibility
- Simplified operation of network devices

From "Introduction to Software Defined Networking" webinar presented by GTRI CTO Scott Hogg on March 10, 2016. Webinar recording:

Publicado en: Tecnología
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Software Defined Networking (SDN) Technology Brief

  1. 1. WWW.GTRI.COM Software Defined Networking (SDN) Technology Brief Scott Hogg, Chief Technology Officer, GTRI CCIE #5133, CISSP #4610 © 2016 Global Technology Resources, Inc. All rights reserved.
  2. 2. Agenda • SDN Introduction and Overview • Benefits and Drivers for SDN • SDN Use Cases • SDN Industry Organizations • Challenges and Objections to SDN, Industry Outlook • GTRI’s Solution Methodology • GTRI’s SDN Solutions and Services
  3. 3. Software’s Influence on IT Infrastructure • “The Times They are a-Changin’”, Bob Dylan • Movement toward virtualization, multi-tenancy, cloud services, the third platform, and influenced by consumption economics • “Why Software Is Eating The World”, by Marc Andreessen, (WSJ, Aug 20, 2011) • DevOps isn’t just a popular digital-age portmanteau, its a movement of IT de-siloization that is also coming to data-networking
  4. 4. Benefits of Virtualization and Software’s Influence • Servers have transformed from bare-metal to virtualized OSs, and now applications are moving to software containers (LXC, Docker, etc.). • Storage systems now have dynamic features like automatic tiering, thin-provisioning, de-duplication, backups and replication. • Networking is beginning to be influenced by software
  5. 5. Today’s Network Limitations • Networking hasn’t changed substantially in 15 years • Most network devices are manually configured one-at-a-time • QoS and other policies are configured manually on each individual device, not tied to current application traffic mix or security policies • IP routing protocols do not take traffic load into consideration • Network Admins have only managed to moved from Telnet to SSH # telnet # ssh –l cisco
  6. 6. What is SDN? • Software-Defined Networking (SDN) means different things to different people. Each person thinks about SDN from their own perspective.
  7. 7. What is SDN? • Software-Defined Networking is an approach to networking that separates the control plane from the forwarding plane to support virtualization. • SDN is a new paradigm for network virtualization.
  8. 8. SDN High-Level Architecture Controller Network Element Network Element Network Element Network Element Network Element Network Element Network Element Network Element Application Layer Or SDN Layer Virtualized Application Services Northbound API Southbound API Control Layer Or Controller Layer Data Plane Layer Or Infrastructure Layer Agent Agent Agent Agent Controller East/West Interface
  9. 9. ODL SDN Controller Architecture Source:
  10. 10. SDN Benefits • Greater span of control and network analytics and response. • Better intelligence with a global view of the network rather than each network element looking at the network from its own viewpoint. • Improved application experience and empower the network owner/operator. • Rapid deployment of applications using networking that supports the application’s specific needs. • Simplified and automated IT administration. • Opportunity to open up the network to a diverse set of vendors and disaggregation.
  11. 11. SDN Use Cases
  12. 12. SDN Use Cases
  13. 13. SDN Value Proposition Source: Cisco
  14. 14. SDN Industry Organizations • Open Networking Foundation (ONF) - OpenFlow, OFConfig, Table Type Patterns (TTP) • OpenStack • OpenDaylight • IETF - OVSDB, I2RS • ETSI - Network Functions Virtualization (NfV)
  15. 15. Objections and Challenges • SDN Controller redundancy, security o What happens if the controller fails? • Central controller needs to be notified of any network failure o How does this happen when the network is down? o Latency for TCP/SSL control signaling – detect sub-ms failures • Speed of flow setup o Controllers will need to support many flows/second • Vendor interoperability between controllers o Do different vendors controllers interoperate? o Current vendors have “Proprietary Openness”
  16. 16. Objections and Challenges (Cont.) • SDN Internet extensibility o How does the SDN controller interface to the Internet? • Human factors o Humans configure routers/switches manually and humans will configure the controller manually o SDN transcends IT group silos (networking, security, servers, …) • SDN is an unproven technology o Industry in its infancy, many small vendors, some vendors are not shipping orderable products, lack of standards for controller interface o Current IT staff has 25% of their time for new projects • ROI/TCO analysis for enterprise deployments o SDN deployments must preserve current IT investments
  17. 17. SDN Security Considerations Controller Network Element Network Element Network Element Network Element Network Element Network Element Network Element Network Element SDN Layer Virtualized Application Services Northbound API Southbound API Controller Layer Data Plane Layer Agent Agent Agent Agent Controlle r Controlle r
  18. 18. SDN Operational Model • Network and security administrators are sometimes threatened by network programmability and software-defined networking. • The truth is, your networking skills and knowledge is transferable to a software-driven/defined world. • Operational issues can arise in the new SDDC environment when groups don’t cooperate well. • Silos of IT operations don’t lend themselves to NFV and SDN and virtual security policy enforcement. • The traditional physical demarcations and lines of responsibility blur with SDN and NFV. • Cross-function and interdisciplinary DevOps teams are needed to make SDN and NFV systems viable.
  19. 19. Elusive SDN Deployments • Have you seen an SDN Deployment? • Universities, campus slicing • Hyperscale technology businesses and cloud service providers who have dynamic networking needs and high virtual machine density • Organizations requiring network taps for data analysis • Some enterprise data-center deployments exist 20
  20. 20. SDN Industry Outlook • More SDN deployments will emerge as solutions mature. • We will see consolidation of vendors in this space (major/larger vendors will absorb the best-of-breed). • Larger vendors will include native SDN APIs to preserve organization’s investment in networking products. • Standards will emerge and the market will drive a winning technology.
  21. 21. GTRI SDN Solutions • GTRI’s Virtualization and Advanced Networking Professional Services (PS) practice has expertise with SDN vendor solutions. • GTRI has top-tier partner status with the most relevant long-term vendors in the IT virtualization market. • GTRI offers an SDN readiness assessment service to assess your infrastructure, your applications, and the benefits to your business gained from using SDN. • GTRI has a SDN test bed where we can learn and teach SDN solutions and help validate solutions prior to deployment. • GTRI is performing SDN deployments and we will freely share the latest vendor and industry information with you.
  22. 22. GTRI’s Solution Delivery Methodology
  23. 23. FREE SDN Technology Review • We are offering a FREE 3-hour (~1/2 day) SDN technology review for your company • Bring your networking, security, DevOps, and other technology teams together • Review SDN capabilities within your existing networked infrastructure • Discuss SDN architecture and design options • Review network automation and network programmability potential
  24. 24. WWW.GTRI.COM Questions and Answers Next Steps SummarySummarySummarySummary 303-949-4865 @scotthogg