I recently spoke at Global Azure 2025, an event packed with sessions on AI, cloud, and system engineering. Cloud Changed the Game, Not the Need for Networking As a network engineer, I knew my cloud networking session was a bit off the mainstream track. But I accepted the challenge. The message I wanted to share was …

In the world of IT, we often categorize costs into two main buckets: capital expenditures (CapEx) and operational expenditures (OpEx). While these two categories are crucial for budgeting and financial planning, there's a third type of cost that often gets overlooked, the decommissioning costs. Known in the …

I’m proud to share that my participation in the CiscoChampions Insider program has been renewed for 2025! Since 2016, I’ve had the privilege of being part of this global group of passionate IT professionals, dedicated to sharing knowledge, exploring innovations, and contributing to the broader tech community. Being a …

Due to some event with extreme weather conditions, a customer decided to use satellite links as a last resort in case of failure of optical and radio links. The use of SD-WAN highlighted some interesting points. When the satellite link was activated, the first test performed was a speedtest. The results, even with some …

In recent years, I have been working more and more in datacenter networking. It has happened to me on several occasions that during testing, the customer would contest that the network performance of the servers was lower than expected. So I put on my systems engineer hat and dust off my VMware training. Non blocking …

A customer noticed that some SFPs installed in a Cisco Nexus were particularly 🔥hot🔥 and asked for a command to be able to see the temperature of all the transceivers. Sounds like a good opportunity to write some code! One of the things I love most about my job is when customers call me with odd requests. These unique …

Performing a traceroute is a very common task for network operations. In this post I share a simple solution I implemented to make it easier to read the command output. Problem I have noticed many requests to the NetOps team for clarification of traceroute output. The Service Desk team does not understand the …

Cisco ISE is one of my favorite products. Although I cannot call myself an expert on it, I have worked on numerous designs where network security and segmentation are based on ISE with excellent results. More than a few times I have needed to document the inventory of nodes in a cluster, and the certificates in use at …

The Mythical Man-month, some wisdom from the past, still valid today. Technology changes but people stay the same.

When two large companies merge, they may be required to merge their respective networks as well, including address spaces. A few years ago I found myself supporting a client in this very situation. The client had started to create a large Excel file with the prefixes in use, to be used for analysis. I proposed to the …

I completed the Cisco Data Center Nexus Dashboard Essentials training provided by CiscoU and collected 22 CE credits for my CCIE. Rev Up to Recert is a program where you can access premium learning for a limited time, with active Cisco Certification holders gaining the added benefit of accumulating Cisco Continuing …

Today I completed the Jobleader ICT Management course, which began last November. The course provided by CUOA Business School is a pathway to growth in management, intended for managers and professionals in the IT field, technical IT specialists, systems engineers and software developers. It lasted 6 months, with …

Since I took CCNA I have always tried to renew my certifications with exams from other tracks. Now with Cisco U and the Rev Up program it becomes even easier to get CE credits and at the same time delve into other technologies. Rev Up to Recert is a program where you can access premium learning for a limited time, with …

Reading this blog made me very curious: Path Quality Part 1: The Surprising Impact of 1% Packet Loss The final result is: In this study, 1% of packet loss caused a 70.7% decrease in throughput. When applications experience performance problems usually someone blames the network. It is not always easy to convince that …

A customer called because they expect the Internet access in the DC to reach 10 Gbps, but a speedtest only shows 1 Gbps throughput. Once again, it's a network issue. Or not? I can't remember how many times I have solved network performance problems only to prove that it was a server/client/application/DNS/VMware …