In a quite recent event, the CA/Browser Forum decided that there’s a need for a way for CAs (Certificate Authorities) to check if they are allowed to issue certificates for a certain domain. And in a even more recent move,… Read More ›
Networks
How to Factory Reset a HP Procurve / Aruba Switch – HP Networking Series Part 5
Sometimes it might be helpful to reset an HP Procurve / Aruba switch to it’s default factory config, and weirdly it took me until my 153rd installed switch (yes, I actually looked up how many I’ve installed over the years… Read More ›
The World’s Longest Console Cable – Smartflex Router Series
As everybody knows, console cables and their corresponding interfaces are a scourge on a network administrators existence. They are always too short, COM-ports get renumbered, Baud-rates are unknown, etc. By their very nature, you also have to be physically present… Read More ›
Time Servers – GPS Antenna Placement
If you haven’t noticed already, I have something of a thing for everything time synchronization related. “Proper”, exact time is something that I find important, it’s probably OCD related. As a part of my day job, I manage a… Read More ›
How to Stack HPE/Aruba 2920 Switches – HP Networking Series Part 4
The 2920 series switches from HPE/Aruba has a special feature that no other switches in the old ProCurve/E-Series line-up has; dedicated stacking interfaces. On other HPE switches, stacking merely facilitates “simplified” management, by allowing you to manage any switch in the… Read More ›
Cisco Switch Not Responding to Ping? – Cisco Networking Series Part 2
If you’re anything like me, you like to get things up and running fast. And this means doing a bare minimum configuration of a new switch so you can get to testing connectivity as soon as possible. So, what do… Read More ›
Setting up NTP on Cisco Switches – Cisco Networking Series Part 1
This is more for my own reference than anything else, but what follows here is a short tutorial on how to get NTP up and running on your Cisco iOS device. First we need to get DNS working for the… Read More ›
Setting up NTP on HP Switches – HP Networking Series Part 3
This is a short guide on how to set up NTP time synchronisation on HP Network devices. I’ll be covering SNTP settings in this guide, as well as some of the niftier things that aren’t in the manuals but still… Read More ›
Using the reload command with HP Switches – HP Networking Series Part 2
When configuring network hardware over the network itself it’s very easy to issue a command that breaks the network connection to the switch, requiring you to visit the switch and connect to it with a console cable to fix the… Read More ›
Grumpy Techie 