Home
Christopher Hart
Cancel

Static Route with Same Administrative Distance as Dynamic Routing Protocol

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...

Cisco Modeling Labs IOS-XE Virtual Router Bootstrap Configuration

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...

TAC Tales - Saving Configuration is for Quitters

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...

ICMP Redirects - How Data Plane Traffic Can Become Control Plane Traffic

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 ...

Understanding Control Plane Packet Loss due to CoPP

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 ...

Understanding the Data, Control, and Management Planes of Network Devices

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...

Understanding Load Balancing on Network Devices

A common misunderstanding engineers have about Equal-Cost Multi-Pathing (ECMP) and port-channels is that they increase the bandwidth that can be used between two network devices. This can be true, ...

Normalizing JSON Data Structure Output on Cisco NX-OS with Python

Earlier this year, Ivan Pepelnjak wrote a blog post on how the way network operating systems (including Cisco’s NX-OS) convert XML-based data structures to JSON can cause certain keys to be either ...

Windows 10 OpenSSH Equivalent of ssh-copy-id

At the moment, Windows 10’s implementation of the OpenSSH client does not have the ssh-copy-id command available. However, a PowerShell one-line command can mimic the ssh-copy-id command and allow ...

Quick Lab - RIPv2 Auto Summary

RIPv2’s automatic network summarization feature is easy to misunderstand, which can be a recipe for disaster in a production environment or on the CCIE R&S lab exam. Let’s analyze the exact beh...

Trending Tags