Confirming Your Current User Account
When working on Linux, you might not always be able to see which user you are logged in as by default, or perhaps you want confirmation before making a change.…
Understanding Show IP Route
On Cisco Layer 3 devices, the Show IP Route command tells us about all the L3 routes the device knows about (though you will have to specify the VRF if…
Testing an Ethernet Cable from a Cisco Switch
An essential factor in troubleshooting LAN connectivity is by first ensuring that the physical connections are functional. When it comes to a Layer 2 network, this means the Switches, the…
Configuration Register and ROMMON
On a Cisco Device, the Configuration Register (often referred to and listed in the configuration as ‘confreg’) is a value which tells the device which software to load and run.…
Bundle Mode vs Install Mode
When installing or upgrading the IOS on a Cisco Switch, there are 2 modes we should be aware of. Bundle Mode and Install Mode. As you’ve likely guessed, these are…
Provisioning Switch Ports on Cisco DNA Center
Having been fortunate enough to get some hands on experience with Cisco’s vision of the future of the Campus Network, DNA Center, I found myself relearning how to do basic…
Understanding Switch Stack Uptime
When you have multiple Switches as part of a Stack, it can be slightly confusing when checking the uptime to determine what is what. Let’s take a look at how…
Trace Route: How Does It Work?
Trace Route is a useful tool that is used to determine the path taken by packets when going to a certain IP Address. If you have multiple paths to a…
How DHCP Works
It’s the hidden staple of modern day life. A device connects wirelessly/plugs into a network and after a few minutes everything just… works (usually). You can browse the internet just…
Cisco Phone Bootup Process
A key aspect to troubleshooting Cisco IP Phones is understanding how they boot up and register in the first place. This post is written with the explicit intention of simplifying…
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