When I was renting apartments, one of the networking features I never really considered was Power-over-Ethernet (PoE). Sure, part of that was because I couldn't put any holes in the walls to wire things up, but it was also a while ago now, and the multiple conflicting standards always made it complicated to research. Now that I'm in a townhouse, those considerations are gone, and one of the improvements I had planned was to add PoE for the devices that can support it.

And you know what? It's been a total game-changer for how much I love my smart home, making adding new devices easier. It helps that the builders added network drops into every room, so I didn't have to fish cables, but I'm that giant step closer to the automated, integrated smart home that I was promised at World's Fairs and the like. Except, there's always something I miss when planning out projects, and while PoE has been nothing short of revolutionary, I have one big mistake to fix.

Power-over-Ethernet made my smart home amazing

Who wouldn't love simplified installation using low-power wiring?

I've always been a wireless networking-first type of guy, but I realize looking back that it was born from the situation and necessity. I'm naturally lazy, which sounds bad, but really it means that I've got a framework for decisions that gives the best outcome for the least effort, and that's been pretty beneficial in many areas. I don't like having to do jobs twice, so I'll get the right tools and services the first time, and for the longest time, that was a mesh network for good Wi-Fi coverage. I also hate, hate, hate cable clutter, and I'd run my entire PC wirelessly if I could.

But now that those network wires are inside the walls, I can't see them? Perfection. Now my access points only need Cat6 from the wall to operate. My IP cameras can be mounted with a single section of shielded, weatherproofed cable. I can run LED lighting with centralized control in places I'd usually need an electrician to install. It's been an absolute sea change of improvement, and it will be a non-negotiable in the future in every home I live in.

I wish there were more compatible devices

Now that I've had a taste of using PoE for my networked devices, I want more. I don't believe the market is saturated yet, and many household devices could be easily switched to PoE, replacing bulky AC-to-DC converters. PoE could power USB-C phone chargers, which could be more easily moved to various places around the home, so you'd never have to hunt for a charger again.

I made a terrible error in judgment picking my switch

Mistakes were made in port choice that I'm now rectifying

In my excitement about being able to run a single cable for my future Wi-Fi 7 access point, I overlooked a basic piece of information when picking my network switch. It's not even really PoE-related, but thoughts of PoE definitely spurred on the hastiness. I've since had plenty of people point out this lapse in judgment, and it's blindingly obvious looking back, but at the time, I was oblivious.

The issue, dear readers, is that my wondrous 4x4 on each of the 2.4GHz, 5GHz, and 6GHz radios inside my access point, which was designed for much larger venues than my house, needed a 10GbE connection to supply enough bandwidth to utilize each of those radios fully. And in my haste, I picked up a switch with 2.5GbE on each of the PoE++ ports, while the 10GbE SPF+ ports don't supply any power other than what's necessary for the signal.

A very silly and expensive mistake indeed, but at least I can still use my AP while I wait for a new switch with higher bandwidth ports is on the way.

And I underestimated the total power budget

My current managed switch is PoE++, which means 60W per port, plenty for powerful wireless access points or cameras. I got that much right when I chose it, but I missed another related specification. There are eight PoE++ ports on my switch, but a total power budget of 180W means I could only use three 60W devices if I needed that many. Now I've got a PoE++ switch with a 375W power budget coming, which should be plenty for my needs once I'm using both.

Modern managed switches with PoE++ are more forgiving of users plugging extra devices into the ports than older generations of network devices. Back then, it was possible to plug in too many things, and have the switch partly energize all of them, leading to some fascinating troubleshooting issues that were never the same twice. Nowadays, they'll power what they can fully, and refuse to do the PoE handshake for any more devices, so at least you know which ones are available.

On the bright side, now I have two PoE-capable switches

Maybe this wasn't quite the learning moment that it could have been, because networking standards are confusing, networking company product pages are even more so, and the problem could be solved with a little bit of money and didn't require pulling new cables through the walls or moving power sockets or anything that needed considerable effort. And as a bonus, I will now have two managed switches with PoE++ for future expansion. But it shows that even experienced users can overlook things, and building safeguards and wiggle room in budgets goes a long way to ensuring that problems don't turn into significant issues.