Peter Welcher

Have you noticed that “active-active” has gotten over-used in networking? Not to mention, used inappropriately? The industry could use a little more accuracy in terminology, and perhaps candor, around the [...]

How do you build a global SD-WAN leveraging Cisco Viptela routers and Equinix Performance Hubs? This blog describes a generic approach, informed by some ongoing design work. My intent is [...]

You may have noticed that NetCraftsmen does various types of assessments (network, security, etc.). One of the things I have noticed in doing them is that customer operational practices differ [...]

For a while now, I’ve been mulling over how to tell if interfaces are overloaded in a good automated way. Staring at 1000 interface utilization graphs is not efficient. How [...]

The Information Technology team’s job is never done – it just keeps getting bigger. This blog is about the challenges in finding suitable staff and skills, and some options addressing [...]

A recent blog contrasted routers and switches. This blog contains some related thoughts and is essentially Part 2 of the prior blog. In some recent design situations, I’ve spent some [...]

In a prior blog, I covered Equinix Cloud Exchange (ECX) Fabric. If you’re asking, “what’s an Equinix?”, please see the prior blog. In that blog, we saw that Equinix can [...]

Through some of the work I’ve recently done, I’ve learned more about what products and services Equinix provides. This blog will discuss one of the services Equinix offers, one which [...]

In doing designs lately, I’ve been increasingly running into situations where I have to think hard about using a traditional router or an L3 switch. I’ve made some comments about [...]

I’ve decided I have some real reservations about OSPF routing. I was going to title this blog “Is OSPF Evil?” but decided that is not appropriate. At worst, OSPF is [...]

Design techniques and technology change. Learn why you should get a second opinion when evaluating your needs for a network refresh.

NAT can be used for many purposes, but is it as evil as some people like to think? Here are five use cases that explore its value.