Since there didn't seem to be a mounting bracket for a TP-Link Omada ER7212PC router/switch/controller combo i designed one that would allow me to mount one in any position without blocking any of the RJ45 ports. Both wall and ceiling mounting is possible.
Other features include 2cm underneath the device to route cables through, not obstructing the air vents on the sides and being symmetrical so you can just print 2 without having to mirror the model or load 2 separate stl's.

This mounting bracket makes a good combination with one of the power adapter (power brick) mounts for TP-Link devices available one thingiverse or printables, as the ER7212PC has the same power adapter as a SG2210XMP for example.

Note that any other TP-link device with a side on profile of 131x35mm will also fit.

As to print settings:
No supports needed
PLA or PETG would do fine.