Whether you are learning about computer networking through practice labs or are a veteran network administrator, you may have noticed that occasionally, when you test reachability to a specific dev...

Authoring technical content is a skill. Like any skill, the only way to improve it is to practice. An easy way to author and share technical content is to create a blog and share your technology ex...

It was Christmas Day of 2019, and I was working the holiday shift in Cisco TAC. Working Christmas is enjoyable - it tends to be quiet, and in the rare case you need to assist with an issue or outag...

Overview A common support case I have seen during my career in Cisco TAC is where customers observe intermittently incrementing input discard counters on one or more interfaces of a Cisco Nexus 55...

Overview In the Discord server operated by sysengineer, the community has a Discord bot maintained by Terranova Tech that quizzes people studying for their CCNA and CCNP certifications. The bot as...

Configuration This is the Cisco IOS-XE configuration I use to bootstrap CSR1000v and Catalyst 8000v virtual routers within Cisco Modeling Labs (CML). Whenever I create a topology involving Cisco I...

In December of 2019, a customer opened a TAC case where the copy running-config startup-config command would hang and time out after several minutes on a few brand-new Nexus switches. The command r...

Note: If you are not familiar with the concepts of the data plane and control plane on network devices, I highly recommend reviewing my Understanding the Data, Control, and Management Planes of Net...

Note: If you are not familiar with the concepts of the data plane and control plane on network devices, I highly recommend reviewing my Understanding the Data, Control, and Management Planes of Net...

While troubleshooting connectivity issues and packet loss in computer networks, network engineers often misunderstand the difference between the data plane and control plane. This can lead to fault...