BPDU Guard and Root Guard are enhancements to Spanning Tree Protocol (STP) enhancements that improve the reliability of the protocol to unexpected events ad are primarily to ensure design enforcement ( integrity / security). There they must configured in specific locations in the networks.
When working on NX-OS it’s kind of annoying to attempt to use a feature that hasn’t been enabled and get an error message. Why not get an “not enabled” or “not licensed” error message ?
It’s a common discussion about when Cisco VTP protocol is actually forwarded through Cisco switches and when it’s isn’t. I’ve always gotten it somewhat confused and when I stumbled across some old notes on the topic I had an ah-hah moment. I’m answering the equation about when using VTP in your network, which versions are risky – that’s risky is terms of how do you prevent VTP updates from ‘crossing’ a switch.
Short Answer is “It depends, but usually yes.” Long answer follows with a discussion of launch power, receiver sensitivity, and cable losses.
I got asked a question by a reader “is OpenFlow used for Routing or Switching ?”
A short summary of the Fibre Cable Connectors, description and some notes on usage. This is summary notes and intended for reference.
Cisco IOS and Native VLANs – some brief notes to myself.
Why does a Cisco IOS SX switch not let you use VLANs 1002 − 1005 ?
Mostly for my own reference. I really need to practice using the Delete Buffer commands and Ctrl-R Refesh as part of my muscle memory.
Like many tech-workers, we need to ingest vast quantities of knowledge to get started in our jobs. Without that knowledge, there is no working in our business. What is unique, however, is that we continue to ingest knowledge for the remainder of our careers – often consuming large portions of our personal time and energy. Worse we even get tested on it by sitting formal examinations.
How can we manage this process to be more effective ?