SDN: A Brief Anatomy and History. Jason Gintert Co-Founder/CTO, WAN Dynamics

Transcription

1 SDN: A Brief Anatomy and History Jason Gintert Co-Founder/CTO, WAN Dynamics

2 What is SDN? DEFINITION: Software-defined networking (SDN) is an approach to c o m p u t e r n e t w o r k i n g t h a t a l l o w s n e t w o r k administrators to programmatically initialize, control, change, and manage network behavior dynamically via open interfaces and abstraction of lower-level functionality. Source: Wikipedia

3 What is SDN?

4 Key: The Controller

5 Why SDN? Agility: Networks becoming larger, more complex and difficult to manage. Need to deploy new/update services and features more rapidly. Image: SDN Essentials

6 Why SDN? Business Intent: Details of network operations can and should be abstracted (VLANs, ACLs, QoS, etc) allowing for greater speed to deployment and change. I want new server(s)/app(s) here, I don t care how that happens. Image: SDN Essentials

7 Why SDN? Interoperability: Configuration and network policy controllers using open standards abstract platform specifics to create a vendor neutral environment.

8 Why SDN? Mgmt/Monitoring: Need real-time control and visibility with streaming telemetry. CLI/SNMP not up to task of maintaining modern networks! Vs.

9 Why SDN? CIOs: Rest of compute and storage infrastructure leveraging orchestration and automation for agility, network should as well.

10 Old Hat! SDN is the New Hotness but NOT New Roots in Active Networking /GeoPlex - Late 90s Control/Data Plane Split - Early 00s Clean Slate/Ethane/OpenFlow - Mid 00s NOX/POX/ONIX/Beacon/Floodlight Late 00s ODL/ONOS/P4 Ok, those are pretty new J

11 SDN Milestones

12 Back to the Controller

13 SDN Controller Timeline

14 Northbound API: REST Create Read Update Delete curl -X GET hcp://sdn-controller.org:8181/api/devices controller = sdk.controller('sdn-controller.org', 8181) response = controller.get_devices() routers_started = [device.start() for device in response.get_payload() if device.type == 'Router']

15 Southbound APIs: OpenFlow Protocol TCP/6653 Images: ONF

16 Southbound APIs: Open vswitch (OVS)/ Open vswitch Database (OVSDB)

17 Southbound APIs: NETCONF/YANG

18 Notable Production SDN Networks Amazon AWS VPC Cloud ELB Cloud Google B WAN Interconnect E/W Jupiter 2012 Datacenter Andromeda 2014 Cloud Espresso 2017 Peering Microsod SONiC Cloud

19 Commercial SDN Controller Options VMware NSX Controller (Proprietary/ONIX based) Cisco Application Policy Infrastructure Controller aka APIC (ODL based) Dell Active Fabric Controller (ODL based) Juniper Contrail (Proprietary) Big Switch Big Cloud Fabric Controller (FL based) Brocade SDN Controller (ODL based) Nuage Networks Virtualized Services Controller (ODL based)

20 More Commercial SDN Controller Options ADVA SDN Controller (ODL based) Avaya Fabric Orchestrator (ODL based) Ciena Blue Planet Controller (ODL based) Coriant Transcend Controller (ODL based) Extreme OneController (ODL based) Ericsson Cloud SDN (ODL based) Fujitsu Virtuora Network Controller (ODL based) NEC ProgrammableFlow PF6800 Controller (RYU based) Oracle SDN Controller (ODL based)

21 Open Source SDN Controller Options Open Daylight (ODL) Open Network Operating System (ONOS) Open Contrail Floodlight RYU FlowVisor Project Calico Beacon - Inactive NOX/POX - Inactive

22 Do I really need to know this? By 2020, only 30% of network operahons teams will use the command line interface (CLI) as their primary interface, down from 85% at YE16. Andrew Lerner, Gartner 11/2016

23 SDN Controllers Check with your vendor(s)! Open Source Controllers - Big 3 Open Daylight (ODL) hcps:// Open Network Operahng System (ONOS) hcp://onosproject.org/ RYU hcps://osrg.github.io/ryu/ Where do I start?

24 vswitches that work w/controllers Where do I start? Open vswitch (OVS) hcp://openvswitch.org/ Mininet hcp://mininet.org/ Cumulus VX hcps://cumulusnetworks.com/products/ cumulus-vx/

25 Where do I start? Basic Skills for Automa<on/Orchestra<on/SDN Python for Network Engineers hcps://pynet.twb-tech.com/ Network to Code Slack Channel hcp://networktocode.com/community/ SDN Hub hcp://sdnhub.org/

26 Hot/Notable Automa<on Tools Where do I start? NAPALM hcps://napalm-automahon.net/ Ansible hcps:// NetMiko hcps://github.com/ktbyers/netmiko StackStorm hcps://stackstorm.com/

27 Thank you for joining us! Learn more at: w w w. o h n u g. o r g