Emerging Technologies and Security
SDN
Software-defined networking: separating control from forwarding.
- 9 notes
- 73 minutes of reading
- OpenFlow and flow tables explainedHow OpenFlow lets an SDN controller program a switch: the controller channel, flow entries, priorities, multi-table pipelines, table-miss behaviour, group and meter tables, and hands-on commands with Open vSwitch. 8 min · Intermediate
- SDN controllers: ONOS, OpenDaylight and commercial optionsWhat an SDN controller does, its northbound and southbound interfaces, how open-source controllers such as ONOS and OpenDaylight compare with commercial controllers, and how to keep a controller resilient and secure. 8 min · Intermediate
- Network functions virtualisation (NFV)What network functions virtualisation is, how virtual and cloud-native network functions replace hardware appliances, the ETSI NFV architecture and MANO, how NFV relates to SDN, and its security points. 8 min · Intermediate
- Intent-based networking in practiceWhat intent-based networking (IBN) means beyond the marketing: translating business intent into policy, automated activation, continuous assurance and remediation, plus how to adopt it safely and where it fits with automation. 8 min · Advanced
- SDN campus and data centre fabrics: underlay, overlay and policyA vendor-neutral look at how modern campus and data centre fabrics work: a routed underlay, a VXLAN overlay, an EVPN or LISP control plane, and a controller that turns intent into policy. 8 min · Intermediate
- SDN security: risks to the controller and how to protect itThe main security risks in software-defined networking, from controller compromise and API abuse to flow table exhaustion, and the layered controls that protect an SDN deployment. 8 min · Intermediate
- Programmable data planes and the P4 languageWhat a programmable data plane is, how the P4 language describes parsers and match-action tables, how it differs from OpenFlow, and where P4 is used for telemetry and security. 9 min · Advanced
- Network planes and software-defined networking (SDN)The data, control and management planes inside every network device, how SDN separates and centralises control, controllers and their northbound and southbound APIs, underlay and overlay, and intent-based networking. 8 min · Intermediate
- What is SD-WAN? Architecture, components and benefitsWhy traditional WANs struggle with cloud applications, what SD-WAN is, its components (edge devices, controller, orchestrator, management), how the overlay uses several transports, and the benefits and limits. 8 min · Intermediate