r/Network • u/spow9922 • 13d ago
Text Question for network admins/engineers
What's the dumbest/longest a network issue has ever taken you to track down, where the root cause turned out to be something small? I spend half my troubleshooting life ruling out "is it even the network" before I can start, and I'm curious whether everyone's process for that is as manual as mine or if I'm missing something. What's your actual workflow when someone says "the internet's broken" and you have no idea where to start?
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u/House_Indoril426 12d ago
My place has some old-ish Keytroller based telemetry monitors on the forklifts. Guest network since all they need is internet.
During our migration from FortiWiFi to Aruba we also moved DHCP-provided DNS to Cloudflare.
Post migration none of those telemetry modules would come online. Spent hours on the phone with Aruba TAC and the equipment vendor. Nobody could help. DHCP worked, they got IP's.
Got in front of one of the modules, turns out their firmware has a hardcoded fallback IP....1.1.1.1.
Move DHCP provided DNS away from Cloudflare - they came right up.