Where are all the PoE switches?

[MarginallyStable]

Netgear GS108Tv3

[AndyC_772]

I've never used a managed switch that had that behavior, and wouldn't find it acceptable.  Normally I would expect either that you can configure the management interface to be on any VLAN or that the management interface would always be on the untagged network accessible via a trunk port.  I'd say that either the switch is misconfigured or defective by design.

I think it's just missing that essential configuration setting, ie. which VLAN to use for the management interface. I even went so far as to RTFM which is here.

I thought it was really odd not to have a simple setting for the management VLAN, so I even went so far as to check the manuals for some other competing switches. Zyxel GS1200-8 is very cheap indeed and supports setting the management VLAN:

https://download.zyxel.com/GS1200-8/user_guide/GS1200-8_V2.00_Ed2.pdf

So does D-Link DGS-1100-08V2/B

https://support.dlink.com/resource/products/DGS-1100-08V2/REVA/DGS-1100-08V2_REVA_MANUAL_v1.00_WW.pdf

My other 8 port managed switches are Netgear, GS108E and GS308E. They seem to default to VLAN 1 for management; it can't be set manually.

I also have a TP-link TL-SG1024DE which also seems to pick VLAN 1 even though it's clearly running the same basic firmware as the 608E. Maybe I just got lucky as it's plugged directly into the router and it's on a UPS so very rarely gets reset.

[coppice]

I still use DHCP but the DHCP on my router can assign variable or fixed addresses to specific MAC addresses, and then add entries to its DNS resolver so whether the IP changes or not, my local DNS resolution points to it on my own custom domain which is not visible outside of my DNS.

I think that's pretty much the norm for modern routers. The problem is the documentation is usually weak, and you have to figure out how to use that facility by trial and error. In a simple setup its the easiest way to have all the devices in your home reachable by a name.

[Halcyon]

- buy some other make / model of switch which has 8 ports and which receive its own power via PoE

For anyone playing along at home, Ubiquiti make a series of switches which can be powered via PoE: https://ui.com/us/en/switching/utility

Their Flex Mini, Flex and Flex 10 GbE can be powered by a downstream switch (or PoE adapter) and will also output PoE on all other ports. The downside is all of them only have 4 usable ports.
The Flex is a good little weatherproof switch if you need a few ports up a pole or outdoors somewhere.