Blog for Technologists

One of the challenges with larger-scale LISP-Pub/Sub-based Cisco SD-Access designs has been how to accommodate having two (or more) Internet-connected border sites with failover. Up until recently, the more obvious [...]

Security is arguably the hottest topic in networking these days, especially for the industry verticals of hospital / medical and manufacturing. One major driver for this is IOT/OT: medical or [...]

I was reviewing some SD-Access documentation I’d written and came across a diagram I found useful in discussing security and where it is enforced. There’s only one aspect of it [...]

I recently posted a blog about the prior blogs I’d written about SD-Access/DNA Center design and some implementation details. My intent there and in this blog is to update y’all [...]

This blog is the first in what may become an occasional blog series. I thought it might be fun (and good marketing, of course) to share some of the many [...]

The disadvantages to an IPv4-based internet were apparent all the way back in the early 90s, but steps were taken to delay the inevitable and allow for the staged development [...]

I recently posted a blog about prior blogs I’d written bearing on SD-Access/DNA Center design and some implementation details. Cisco has documented implementations well. However, what they have seems much [...]

NetCraftsmen has recently had an upsurge of SD-Access design and deployment work. I’ve found myself spelunking through my old blogs (and internal/customer-facing documents) in support of that. To my relief, [...]

TL;DR: I’m a technical omnivore, reading content across typical boundaries. The following is a tale of caution: developing apps for the Cloud is different than for in-data center. Let me [...]

The title of this blog article may well be nothing new in your life. Or it may be something you and your company have discovered the hard way, evolving the [...]

I’ve had the pleasure of working at several organizations, large and small, from internal IT roles and outside consulting positions, and have noted that the cultural structure of IT architecture [...]

TL;DR: pyATS is an automation testing framework that includes a parsing library called Genie. With over 1500 parsers available, Genie can parse device output from multiple vendors, including Cisco, Juniper, [...]