# Rookie mistake **URL:** \ **Category:** General Discussion\ **Created:** [July 15, 2016, 10:00pm UTC](https://forum.inductiveautomation.com/t/rookie-mistake/11937 "2016-07-15T22:00:37Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\ **Post date:** [July 15, 2016, 10:00pm UTC](https://forum.inductiveautomation.com/t/rookie-mistake/11937/1 "2016-07-15T22:00:37Z")
Here’s one for you, and you get to be amused at my expense! Today I made a rookie mistake… It was my own fault, and I was in a bit of a hurry, not paying attention to my cable markings, and plugged both end of an ethernet cable into the same switch. For those not already wincing at that, this creates a [broadcast storm](https://www.google.com/search?q=broadcast+storm&ie=utf-8&oe=utf-8). 😊 Luckily I knew right where the problem was when things rapidly started to go south. And I can take comfort in knowing that IT’s managed switches didn’t cap it either. Took down everything. Yes, I fessed up to it. And also told them that i can take this facility down any time I wanted to-- and occasionally when I didn’t want to as well! 😆 Moral of the story: don’t do that. It’s painful. Not like sticking your face in a fan, but you know what I mean. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [July 16, 2016, 7:50am UTC](https://forum.inductiveautomation.com/t/rookie-mistake/11937/2 "2016-07-16T07:50:27Z")
Yeah, been there. Not for a whole facility, though. In my big company past, I learned to do little isolated networks per system w/ routers tying them together. In some industries, a few minutes loss of control can mean hours of lost production.