Presentation on theme: "SDN Technology Overview. The network paradigm as we know it…"— Presentation transcript:
SDN Technology Overview
The network paradigm as we know it…
Control and Data Plane resides within Physical Device
Control Plane and Data Plane Two fundamental terms to begin understanding the concepts around SDN
Over the years… this network paradigm has remained mostly intact…
SDN gained massive industry mindshare
Software defined networking (SDN) is an approach to building computer networks that separates and abstracts elements of these systems What is SDN? (per Wikipedia definition)
In other words… In the SDN paradigm, not all processing happens inside the same device
Where did this SDN “thing” come from?
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.”
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…
… Clean Slate led to the development of…
OpenFlow is a Layer 2 communications protocol that gives access to the forwarding plane of a network switch or router over the network What is Openflow? (per Wikipedia definition)
Four parts to Openflow
Central Administration and Operations point for Network Elements Openflow Controller
Openflow Controller | Northbound API Northbound API Integral part of Controller “Network enabled” application can make use of Northbound API to request services from the network…
Openflow Device Agent Agent runs on the network device Agent receives instructions from Controller Agent programs device tables
Openflow Protocol Openflow Protocol is… “A mechanism for the Openflow Controller to communicate with Openflow Agents…”
First lesson for today…
Openflow does not equal SDN Openflow Software Defined Networking Openflow is one flavor of SDN
By the way,.. did you know?
Google have been using Openflow to drive their Wide Area Network since January 2011
Urs Holzle, Senior Vice President of Technology Infrastructure at Google speaking in a keynote at the second annual Open Networking Summit (April 2012)
That was a pretty big statement…
…and somewhat validated Openflow as a viable technology in the SDN space
Who controls Openflow?
Non Profit Consortium Dedicated to “the transformation of networks through SDN” Mission to “commercialize and promote SDN…as a disruptive approach to networking…” OPEN NETWORK FOUNDATION
Which companies make up the ONF?
ONF Board Members Deutsche Telekom : Facebook : Goldman Sachs : Yahoo Google : Microsoft : NTT Communications : Verizon
ONF Members 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
The moral of this story is
The “Network Paradigm”… …is being challenged
What is… Overlay Networks
You start with a Physical Switch Network Physical Devices and Physical Connections
Then you add an overlay Overlay provides base for logical network
Logical “switch” devices overlay the physical network Underlying physical network carries data traffic for overlay network They define their own topology
Multiple “overlay” networks can co-exist at the same time Overlays provides logical network constructs for different tenants (customers)
Main Benefit of Overlays? Overlay Network can be created and torn down without changing underlying physical network
What about Openstack? Where does that fit in?
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…”
To understand IAAS, let us first, let us define Cloud Computing…
Network Storage Compute Users Cloud Computing provides a set of resources and services through the internet
What are these resources?
At a more detailed level, there are many resources inside the cloud Applications Runtimes Databases Servers Security VirtualizationStorage Networking
Private Cloud What resources you manage inside the cloud defines the following… Infrastructure as a Service (IAAS) Platform as a Service (PAAS) Software as a Service (SAAS) How do these differ from one another?
Applications Runtimes Databases Servers Security Virtualization Storage Networking Private Cloud Infrastructure as a Service (IAAS) Infrastructure as a Service (IAAS) Platform as a Service (PAAS) Platform as a Service (PAAS) Software as a Service (SAAS) Software as a Service (SAAS) Applications Runtimes Databases Servers Security Virtualization Storage Networking Applications Runtimes Databases Servers Security Virtualization Storage Networking Applications Runtimes Databases Servers Security Virtualization Storage Networking Managed by You Managed by Vendor
Applications With IAAS, compute, storage, networking and virtualization resources are managed by the Vendor (this defines them as an IAAS provider) Runtimes Databases Servers Security VirtualizationStorage Networking Managed by You Managed by Vendor
Openstack lets the provider manage these resources Servers VirtualizationStorage Networking
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. Linux Foundation Platinum Gold Silver
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 APIs Applications 1 Programmable APIs Control Plane Data Plane Vendor Specific (e.g. onePK) Vendor Specific (e.g. onePK) OpenStack and Network Overlays Apply to All Models (Physical/Virtual) CLI, SNMP, Netflow, … 51