1. SDN Technology Overview

2. The network paradigm as we know it…

3. Control and Data Plane resides within Physical Device

4. How fast these processes run Type of processes performed
Processing Plane
Where it runs
How fast these processes run
Type of processes performed
Control Plane
Switch CPU
In the order of thousands of packets per second
Routing protocols (i.e. OSPF, IS-IS, BGP), Spanning Tree, SYSLOG, AAA (Authentication Authorization Accounting), NDE (Netflow Data Export), CLI (Command Line interface), SNMP
Data Plane
Dedicated Hardware ASIC’s
Millions or Billions of packets per second
Layer 2 switching, Layer 3 (IPv4 | IPv6) switching, MPLS forwarding, VRF Forwarding, QOS (Quality of Service) Marking, Classification, Policing, Netflow flow collection, Security Access Control Lists
Control Plane and Data Plane
Two fundamental terms to begin understanding the concepts around SDN

5. this network paradigm has remained mostly intact…
Over the years…
this network paradigm has
remained mostly intact…

6. SDN gained massive industry mindshare

7. (per Wikipedia definition)
What is SDN?
(per Wikipedia definition)
Software defined networking (SDN) is an approach to building computer networks that separates and abstracts elements of these systems

8. In the SDN paradigm, not all processing happens inside the same device
In other words…
In the SDN paradigm, not all processing happens inside the same device

9. Where did this SDN “thing” come from?

10. Stanford University – Clean Slate Project
“…explore what kind of Internet we would design if we were to start with a clean slate and years of hindsight.”

11. You might have noticed the Cisco Logo on the web page
Cisco provided some equipment early in the cycle to the research team
Namely a Catalyst 6500 and 3750 upon which some of the early work was done…

12. … Clean Slate led to the development of…

13. (per Wikipedia definition)
What is Openflow?
(per Wikipedia definition)
OpenFlow is a Layer 2 communications protocol that gives access to the forwarding plane of a network switch or router over the network

14. Openflow Controller Code
App
App
App
Openflow
Protocol
Four parts
to Openflow
Northbound API
Openflow Controller Code OF
AGENT
SERVER OF
AGENT OF
AGENT

15. Openflow Controller Central Administration and Operations point for
Network Elements
Openflow Controller Code
SERVER
Openflow Controller

16. Integral part of Controller
App
App
App
Northbound API
Integral part of Controller
“Network enabled” application can make use of Northbound API to request services from the network…
Northbound API
SERVER
Openflow Controller | Northbound API

17. Openflow Device Agent Agent runs on the network device
Agent receives instructions from Controller
Agent programs device tables OF
AGENT
SERVER OF
AGENT OF
AGENT
Openflow Device Agent

18. Openflow Protocol Openflow Protocol is…
“A mechanism for the Openflow Controller to communicate with Openflow Agents…”
SERVER
Openflow Protocol

19. First lesson for today…

20. Openflow does not equal SDN
Software
Defined
Networking
Openflow is one flavor of SDN

21. By the way,.. did you know?

22. Google have been using Openflow to drive their Wide Area Network since January 2011

23. speaking in a keynote at the
Urs Holzle, Senior Vice President of Technology Infrastructure at Google
speaking in a keynote at the
second annual Open Networking Summit (April 2012)

24. That was a pretty big statement…

25. …and somewhat validated Openflow as a viable technology in the SDN space

26. Who controls Openflow?

27. Dedicated to “the transformation of networks through SDN”
OPEN NETWORK FOUNDATION
Non Profit Consortium
Dedicated to “the transformation of networks through SDN”
Mission to “commercialize and promote SDN…as a disruptive approach to networking…”

28. Which companies make up the ONF?

29. Deutsche Telekom : Facebook : Goldman Sachs : Yahoo
Google : Microsoft : NTT Communications : Verizon
ONF Board Members

30. 6WIND A10 Networks ADVA Optical Networking Alcatel-Lucent Aricent Group Big Switch Networks Broadcom Brocade Centec Networks China Mobile
Ciena Cisco Citrix CohesiveFT Colt CompTIA Cyan Dell/Force10 Elbrys Ericsson
ETRI
Extreme Networks EZchip F5 France Telecom Orange Freescale Fujitsu Gigamon Hitachi HP Huawei IBM Infinera Infoblox Intel
IP Infusion Ixia Juniper Networks KDDI
Korea Telecom
Level 3 Communications LineRate Systems LSI Luxoft Marvell Mellanox Metaswitch Networks
Midokura
NCL Communications NEC Netgear Netronome NetScout Systems Nokia Siemens Networks
NoviFlow Oracle Overture Networks PICA8 Plexxi Inc.
Qosmos
Radware Riverbed Technology Samsung SK Telecom Spirent Sunbay Swisscom Tail-f Systems Telecom Italia Telefónica Tencent Texas Instruments Thales Transmode Turk Telekom / Argela Vello Systems Verisign VMware/Nicira Xpliant ZTE Corporation
ONF Members

31. The moral of this story is

32. The “Network Paradigm”…
…is being challenged

33. What is…
Overlay Networks

34. You start with a Physical Switch Network
Physical Devices and Physical Connections

35. Overlay provides base for logical network
Then you add an overlay
Overlay
Overlay provides base for logical network

36. Logical “switch” devices overlay the physical network
They define their own topology
Overlay Network #1
Underlying physical network carries data traffic for overlay network

37. Multiple “overlay” networks can co-exist at the same time
Overlays provides logical network constructs for different tenants (customers)

38. Main Benefit of Overlays?
Overlay Network can be created and torn down without changing underlying physical network

39. What about Openstack?
Where does that fit in?

40. It is also referred to as a Cloud Operating System
Openstack is an IAAS (Infrastructure As A Service) cloud computing project
It is also referred to as a Cloud Operating System
“…provides a means to control (administer) compute, storage, network and virtualization technologies…”

41. To understand IAAS, let us first, let us define Cloud Computing…

42. Network
Compute
Storage
Users
Cloud Computing provides a set of resources and services through the internet

43. What are these resources?

44. At a more detailed level, there are many resources inside the cloud
Applications
Servers
Networking
Runtimes
Virtualization
Storage
Databases
Security
At a more detailed level, there are many resources inside the cloud

45. What resources you manage inside the cloud defines the following…
Software as a Service (SAAS)
Private Cloud
Infrastructure as a Service (IAAS)
Platform as a Service (PAAS)
How do these differ from one another?

46. Infrastructure as a Service
Private Cloud
Infrastructure as a Service
(IAAS)
Platform as a Service
(PAAS)
Software as a Service
(SAAS)
Applications
Applications
Applications
Applications
Runtimes
Runtimes
Runtimes
Runtimes
Databases
Databases
Databases
Databases
Security
Security
Security
Security
Servers
Servers
Servers
Servers
Virtualization
Virtualization
Virtualization
Virtualization
Networking
Networking
Networking
Networking
Storage
Storage
Storage
Storage
Managed by You
Managed by Vendor

47. Managed by You
Managed by Vendor
Applications
Servers
Networking
Runtimes
Virtualization
Storage
Databases
Security
With IAAS, compute, storage, networking and virtualization resources are managed by the Vendor (this defines them as an IAAS provider)

48. Openstack lets the provider manage these resources
Servers
Networking
Virtualization
Storage
Openstack lets the provider manage these resources

49. What is OpenDaylight?
OpenDaylight is an open source project formed by industry leaders and others under the Linux Foundation with the mutual goal of furthering the adoption and innovation of Software Defined Networking (SDN) through the creation of a common vendor supported framework.
Platinum
Gold
Silver

50. Draft Project Daylight Framework

51. Network Programmability Models
Vendor-specific APIs
Applications 1
Programmable APIs
Control Plane
Data Plane
Controller
Data Plane
Applications
Vendor-specific APIs
OpenFlow 2a
Classic SDN
Vendor
Specific
(e.g. onePK)
Controller
Data Plane
Applications
Vendor-specific APIs
OpenFlow
Control Plane 2b
Hybrid “SDN”
Applications
Virtual Control Plane
Virtual Data Plane
Overlay
Protocols
(e.g. VXLAN)
Vendor-specific APIs 3
Network Overlays
Control Plane
Data Plane
Vendor
Specific
(e.g. onePK)
Vendor
Specific
(e.g. onePK)
CLI, SNMP, Netflow, …
Control Plane
Data Plane
OpenStack and Network Overlays Apply to All Models (Physical/Virtual) 51