What we have seen is that a logically centralized, hierarchical control plane with a peer-to-peer data plane beats full decentralization,” explained Vahdat in his keynote. “All of these flew in the face of conventional wisdom,” he continued, referring to all of those projects above, and added that everyone was shocked back in 2002 that Google would, for instance, build a large-scale storage system like GFS with centralized control. “We are actually pretty confident in the design pattern at this point. We can build a fundamentally more efficient system by prudently leveraging centralization rather than trying to manage things in a peer-to-peer, decentralized manner.
Decentish take on the evolution of SDN in networking.
So let’s assume that all the vendors converge on a small set of merchant silicon, which invariably leads to lower hardware prices. Even then, the network vendors will simply switch the pricing mix to more accurately reflect what we have known for years: that the software is where it’s at. While the hardware will indeed be cheaper, the overall solution will cost roughly the same. We don’t end up with commoditized network gear; we end up in a world that reflects the actual R&D splits a bit more faithfully.
Yup. Except in places where you can offload a service to x86. So not the forwarding plane like everyone likes to talk about, but the control plane and some of the services will take advantage of x86. So better economics for sure, but not necessarily via cheap switches.
(via Searching for an SDN Definition: What Is Software-Defined Networking? - Network Computing) Required reading.
Cisco’s David Ward gave a talk on “SDN for Service Providers,” which was likely more of a broader shaping up of Cisco’s SDN strategy, and was, not surprisingly, very similar to the presentation he gave last year while he was at Juniper, including the “network weather map” analogies. Points for consistency.