Blog

I was recently troubleshooting an HSRP issue with two Nexus 5500 switches that both were in the active state. (I was trying to add HSRP to a long-running pair of [...]

I was recently troubleshooting an HSRP issue with two Nexus 5500 switches that both were in the active state. The root cause appeared to be a missing LAN_Base license. Although [...]

Edited by Marilyn Outerbridge Editor’s note: This is the latest in a series of blog posts of NAT configuration. Click below for previous installments: Part 1 Part 2 Part 3 Table [...]

I’m getting the impression some people think Cisco Nexus 9K automatically means doing ACI. Not so! There are several valid ways to design around an N9K. The ones that come [...]

Disaster recovery is one of those important things that seldom seems to get the attention it deserves. My experience is that most large organizations, and some smaller organizations, have disaster [...]

We’ve been discussing the many things that could be killing your network’s performance – often quietly and without your knowledge. Last time, we covered the value of using the right [...]

Information technology is constantly changing. To help stay at the forefront of it, I’ve made attending Cisco Live – an annual gathering of engineers and other thought leaders on all [...]

What’s eating your network? What is (quietly) killing performance? What performance items should you be watching, but probably are not? I’m a big fan of appropriate network management data, with [...]

One of the complications of gateway certificates is replacing old certificates on CUCM, after a secure gateway dies. Take it from someone who has been there, the easiest way to [...]

Accurate information about the applications in your data center leads to precise planning and design. Here’s how to get it with Cisco Tetration Analytics.

Producing a great network design requires balancing many factors: You’ll have to identify the best technologies for the task(s), and also factor in technology maturity, risk, cost, technical skills needed, [...]

Have you ever needed to know what applications are running on your network? Have you ever needed to determine the set of protocols and ports used by an application so [...]