Blog for Technologists

Among other things, for some time now I’ve been designing data centers with Nexus 93180 or 93240 switches, leveraging their 40 / 100 Gbps ports and inexpensive 100 Gbps copper [...]

Resilience Engineering Resilience engineering is the practice of designing networks (and other things like airplanes) such that any failures are gracefully handled. But how do you know that your engineering [...]

Who owns Cloud Security in your organization? Or what is the division of responsibility? Are they treating cloud as just another part of your network, or are they considering risks [...]

This blog shares some thoughts about BGP Traffic Engineering (TE). The good news: there is some good content to be found on the Internet on the subject of BGP Traffic [...]

This blog takes a look at a couple of ways to design Internet connectivity in the presence of Layer 3 data center interconnect (DCI). There’s an inherent design question in [...]

IT in security is big business. With a solid IT security foundation, you can protect your organization from threats – saving time and money. In Part 1 of this series, [...]

Learn more about the Cisco Nexus 93240YC-FX2 switch, 100 Gbps fabric options, and the new alternative VPC with fabric peering.

One of my recent blogs alluded to inbound QoS. This topic came up in a recent consulting engagement. After considerable thought and some research (sounds better than “I googled some [...]

IT system intrusions and malware are increasing. What can you do about it? I’ve stayed away from IT security for a long time. It has seemed to me to be [...]

Determine what to look for, how to address and how to manage Quality of Service (QoS) and user experience issues on your network.

DNS security is a valuable first layer of visibility and defense that provides powerful insight into an organization’s internet communications.

Container Networking is complex. Understand Docker Networking and the various network modes: Bridge, Host, Overlay and Macvlan.