TFI2014 Keynote - Russ White
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TFI2014 Keynote - Russ White
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TFI2014 Keynote - Russ White
- 3. SDN Falls Is this the future?
- 6. You are here
- 7. Where do we go from here?
- 8. THERE IS NO SILVER BULLET FOR COMPLEXITY C≤1/R Impossible!
- 9. WE NEED TO RETHINK FAILURE DOMAINS Wish you were here…
- 10. WE NEED TO SEPARATE POLICY FROM REACHABILITY !=
- 11. WE NEED TO RETHINK OUR MODELS
- 12. WE’RE NOT GOING TO SOLVE DIFFERENTIATION != != != !=
- 13. THE NETWORK STILL ISN’T FREE Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. Andrew S. Tanenbaum
- 14. WHAT WILL THE INTERNET LOOK LIKE? ● “Messy, as always” ● SDNs will be overhyped and overplayed ● Back in the real world, SDNs will have an impact ● Some complexity will be moved from distributed control planes into centralized control planes ● Failure domains will be reshaped ● Policy will be separated more cleanly from reachability ● But none of these are going to be… ● Done in the way we expect ● As “clean” as we might expect
- 15. PERSONAL SCALE THOUGHTS ● The command line will become less important ● Theory and principle will become more important ● Coding skills will become the norm
Editor's Notes
- “Solving” Complexity is simply impossible SDNs aren’t going to solve complexity We can move complexity around, though – we need to be aware of whether we’re doing so in an efficient way or not
- Aggregation? Layer 2/Layer 3? We did those things for a reason Moving all our control plane into a single “god box” that relies on software skills might not be the best answer here Failure that spreads across a single domain is still a train wreck
- We have always put policy into our forwarding tables through communities, metrics, etc. The muddle between these two is making our lives miserable We’re trying to build our taxonomy on hard (corner) cases – the platypus is not a good place to start when defining the difference between mammals, reptiles, and birds Many of the complexity problems we face today are because we’re dispersing policy in a thousand different ways, using a thousand different tools; there’s no consistency Forwarding needs to be a combination of policy and reachability, but routing doesn’t necessarily
- “Fast == Control Plane, Slow == Management” just isn’t going to cut the mustard any longer The seven layer model is (pretty much) dead – obsolete We need to think about iterative models, hybrid models – let’s go back and rethink how we describe networks
- Vendors are not going to “lay down” and just “go with the white box” To stay in business, you differentiate your skills, network, etc. Even car vendors differentiate! Vendors want to sell stuff, so they’re going to differentiate There is a rebalancing that’s going to happen between commodity and custom, but we’re still going to have different features, etc. And we wouldn’t want it any other way – otherwise, you can kiss innovation goodbye
- Networks are a sop to human impatience This isn’t about to change any time soon You can’t make money shipping bits – the bits have to mean something You can’t make money shipping content without a container, either… Cloud is, to some degree, predicated on the idea that the network is free