The networking industry has recently developed a renewed interest in virtual overlays, often wrapped in an “SDN as the controller” context. Amidst the promise, the hope and the hype, the following questions present themselves:
- What exactly is an overlay?
- What distinguishes an overlay from a VPN?
- How decoupled can an overlay be from the underlay network and what are the tradeoffs?
- What are the advantages of overlays and will they emerge as the new networking world order? Read More »