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...

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...