Connection Refused

An interesting thing happened on my network over the last few days. It was easily remedied, but if you’ve never seen the issue…

Demystifying OSPF on a vPC

A common issue among network engineers managing the Cisco Nexus platform is how to form routing adjacencies on hosts over a Virtual Port…

Designing a Network (Part 2)

If you’ve considered the problem I wrote about back in December, no doubt there have been some questions about requirements. Actually, if you’re…

Plan BEFORE You Execute

Before you implement a network or systems change, it’s very important to have a plan. A plan that not only includes your scripted changes but also a back-out and recovery plan.

Designing A Network (Part 1)

Over the next few weeks, I’m going to do a series on network design in the enterprise. It’s funny how a network becomes…

The CCDE Journey

CCDE :: Why Did I Decide After 20 years in the networking business, I’ve decided to start chasing the Cisco Certified Design Expert…