this post was submitted on 09 Nov 2023
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Home Networking

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This month has just not been a good month for me and switching hardware, just wanted to vent...

First of all my wife messages me that the internet is out. We recently separated but are on good terms, so I go back over there and down to the basement where everything is mounted to the wall, only to find the equipment is soaked. Apparently the drain for the dishwasher in the kitchen right above it came apart and was pouring water through the floor into the basement for some time, giving the switch a shower. Lost a PowerConnect 5524 and a pfSense router, but the TrendNet PoE+ switch is still partially alive since it was small and under everything else. I can't tell if the ports that went out were because of the water or something else, as I had problems with it before.

Next up is at my current place staying with my brother, I got his network upgraded so I could work from here too. I end up using a PowerConnect 7048p since I needed 4x 10G ports and PoE. For about a month I ran a Cisco Aironet 1042 PoE AP as the only PoE device, but then one day the wifi randomly went out. Come to find out, the PoE died in the switch. I can't figure out what happened but its dead. Everything else still works but PoE.

I replace that switch with another identical 7048p unit I got from the same batch. Again, PoE worked fine for about a month and then it died too, same circumstances.

I currently have the second switch still running, but I stuck another small TrendNet PoE+ switch in there just to power the AP for now. I have a couple more of those 7048p units, but at this point I am afraid if I keep switching them out I am going to end up with a stack of normal 7048 units.

Am I cursed, or is PoE really that fragile? I have a Powerconnect 5524p I installed for a friend at his business 5 years ago and its still going fine powering 3 of those Aironet 1042 APs, so I am starting to wonder if the 7048p units I have are close to death, or its a design problem, or something I am doing.

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[โ€“] MrMotofy@alien.top 1 points 1 year ago (1 children)

Sometimes transformers lose a neutral or something I think it's called and can fry equipment. Should have everything on a UPS anyway. That would help a lot I'd suspect

But it can also mean there's wiring issues in the POE run. Like excess static charges etc

[โ€“] knightcrusader@alien.top 1 points 1 year ago

Yeah, everything is on a APC BackUPS 1500, but it is an older one that still works. I have a new one in box I may swap it out just to be sure. After my old place had a floating neutral and fried a lot of shit but not the stuff on the UPS units, I have since made sure all the good stuff is on a UPS.

As for the wiring, it was a brand new monoprice Cat6 patch cable (AP is only a few feet from the switch, temporarily). I hope that its not bad, but I know shit happens in manufacturing. I'll test it out when I get some time tonight.