Welcome to the inaugural post in my Before I Forget series. I”ll be using this category to document bits of knowledge that I don’t want to lose. We all perform steps that are only needed once in a while; but when you need them – you really need them! I know they will help me. I hope they benefit others as well…
Rogue IP Addresses can mess up the day
In this case, I figured out how to find the MAC Address of an errant device on my network using it’s IP Address. My Homelab uses a Dell PowerConnect 6248 at it’s core. It is an older; but quite serviceable switch.
I received an alert the other day that one of my Wireless APs had gone offline. I went through a few troubleshooting steps and found that while I could ping it’s statically assigned IP – it did not show up in the Ubiquiti management console. I restarted the device but it did not resolve the issue.
Obviously something was responding on that IP Address; but I didn’t know what it was. This particular subnet was wired-only, so I knew I could track it down. A seasoned network engineer I am not; but was able to figure it out within a few minutes.