SD-WAN and Multiple Metrics

Ivan has posted a reaction to Ethan, which prompts me to… Okay, let’s start at the beginning. Ethan wrote a nice post on SD-WAN and the “shortest path we always wanted,” covering some of the positive and negative aspects of software defined WAN. Ivan responded with this post, in which he says several interesting things,…

The Tinker and the Geek: Information Technology

Imagine you’ve just woken up and found yourself in a small kingdom someplace in Europe around 1200 AD. You wander outside, interested in your surroundings, and find yourself in the middle of a fair. Taking stock, you see a man standing in a tent across the way who appears to be tapping on something with…

The Pie Problem: Growth and Ratios

Why does it seem life goes faster as you get older? There are several reasons, of course — a primary one being it always seems there’s more you need to do and less you want to do, as you get older and take on responsibilities. I know that the last 17 years, since my first…

Network scale is more than size

“Judge me by my size, do you?” I’ve had several discussions with people over the years about the concept of scale in the world of network engineering. Most often, when network engineers think of a “large scale network,” they used to mention large service providers. Now they tend to think of some large cloud provider.…

Why I Support Certifications

I’m betting that I could take my certifications off my resume and still have a fair chance at finding a job. It’s a guess, of course, and I’ve never tried any sort of an experiment towards finding out, but the point is this: at some point in your career, certifications should become just one more…

Review: Building Microservices

Building Microservices Sam Newman ISBN: 978-1-491-95035-7 Scale out where you can, scale up where you must. Someone, somewhere, should probably start a collection of “where you can, where must” sayings, as these rules of thumb (thumbs were used by carpenters instead of a ruler to measure an inch, apparently) are important to remember, even if…

Explain-a-holic (Communicate Clearly)

But just a couple of days ago, I was talking to someone about managing expectations in the IT world. How do you convince someone else to buy into a project? How do you get them to back your idea, rather than inventing their own? While the question itself is interesting, I’m going to leave my…

Architect or Designer?

Are you an architect or designer? What’s the difference? A reader asked this last week in email — my (probably) less than perfect response. First, we have to dispense with this objection — network people aren’t “architects” in the first place. Nor are they “engineers.” Okay, so… A challenge: what else would you call someone…

Resume Building

It’s a discussion in meeting rooms, boardrooms, hotel conference rooms, and post-conference cocktail parties: Why isn’t IT working? Ask anyone in a corporate or government job and you’ll get an earful. As I was writing this book, I’d occasionally throw the question out to friends, clients, and beleaguered airplane seatmates. The responses come fast and…

The right tool for the job

This last weekend I set a toilet, replaced five faucets, and put together the beginnings of a workbench. No, I’ve not resorted to working in “the trades,” to make a living — I’ve been slowly but surely finishing and refashioning our “country house” to better accommodate the time we spend “in the country.” One of…