On October 26, 2016 at 5:30p, I’m speaking to a couple of Chicago-based MeetUp groups banding together to hear me discuss implementing SD-WAN. The talk will be held at Cisco Systems Building – SkylineATS, 9501 Technology Blvd. 3rd Floor, Rosemont, IL. Sign up via http://bit.ly/2d5ffDC or http://bit.ly/2crmtng.
I’m leading an SD-WAN related webinar as a guest of Silver Peak on November 19, 2015 at 12pm PT / 3pm ET. If you’d like to attend, register via http://bit.ly/1MqVD6S.
In recent years, infrastructure vendors have been proudly pointing out their APIs. The idea is that because a chunk of infrastructure can be monitored and configured with APIs, the product can be described as automation-ready or open. Vendors, you’re getting it wrong here.
Open source projects that involve lots of folks sometimes run into conflicts. Should the project go in direction X, or direction Y? Is feature A more important, or feature B? And so on. Sometimes the concerns around an open source project are more pragmatic than pedantic. Should we, as a commercial entity, continue to use this open source project as is, or go in our own direction with it? The keyword to look for in these circumstances is fork.
During a recent briefing with Brocade about the 2.0 release of the Brocade SDN Controller product, I took the opportunity to clarify their commitment to openness in the software defined networking world.
In the world of idealistic fantasy, an software defined network of whatever kind would centralize all functions. Pesky reality gets in the way of idealism, and so it is that we find full centralization to be an impractical idea.
Scale is a relative term. While every technology needs to scale to some point to be useful to IT practitioners, not every technology needs to scale infinitely. Every technology has a context in which it is viable — where it proves to be the best choice. But in another context, the opposite technology might rise to the surface as more appropriate. Don’t be religious about such a decision. Know your business need well, research the technology thoroughly, plan for the future, and choose wisely. Don’t pick a tool that solves someone else’s problem.
Consumers evaluating SD-WAN shouldn’t think of it as a WAN optimization replacement, at least not exactly. These are different technologies, although it might be fair to think of SD-WAN as the successor to WAN optimization. SD-WAN and WAN optimization are compatible technologies, but not interdependent technologies.
In networking, we rely on routing protocols to compute best path. That is to ask, from the perspective of a given router in a routing domain, what is the best way to reach a destination? Best path is typically computed using simplistic metrics like hop count, cost, bandwidth, and delay. Traditional “best path” thinking is effective, insofar as it goes. It scales to a large number of devices and destinations. It is resilient. It is mature. However, it has its limitations. Software defined WAN brings a much more sophisticated metric to the computation of best path.
More live blogging from ONUG Spring 2015 in NYC. Coverage of sessions related to open networking, SDN, use cases, customer experiences with emerging technology, etc.
My live blog from the ONUG 2015 Spring event in NYC.
Dell is all about open networking, and several whitebox vendors had their wares on display at Interop. IP Infusion has released OcNOS, an open networking operating system with a rich feature set right out of the gate. Ethernet switching continues to change. If you are Yet Another Cisco Buyer, do you care? I think you should. There are real dollars at stake. Eventually, it gets silly and/or irresponsible to spend money on Cadillacs.
My interpretation of the SD-WAN value prop can be boiled down to cost savings, simplified operations, and improved application performance over inconsistently performing WAN links. Here’s the conundrum. An engineer might instinctively recoil at this sort of value proposition.
Should you go from the CCNA to the CCIE directly? Why or why not? Considering SDN, is going after the CCIE even a good idea? I opine.
There’s a lot to SD-WAN technology, and there are a number of devils in the implementation details that have been nagging at me as I listen to briefings and record podcasts from vendors in the space. SD-WAN technology questions that bother me… What’s the impact to hosts on virtual machine based endpoints, i.e. how much CPU does an SD-WAN …
Big Switch Networks has released version 2.5 of their Big Cloud Fabric SDN offering. Read the full press release here. What’s Big Cloud Fabric? BCF is an SDN-based IP fabric where you manage all of the individual switches as one “big switch.” In other words, you manage the fabric as a whole, and not individual switches. Big Switch’s BigTap, …