Also, in the case of a single PoE device, do you guys use the out-of-the-box PoE device? What I’ve seen so far from Mikrotik does not seem to provide much protection.
When I needed managed PoE, I used Ubiquiti’s ToughSwitch PoE Pro. They were quite good, but used to freeze once in a while. As far as I remember, they were also not fully transparent for GRE.
Out-of-the-box PoE? Used them many times. Never analyzed whether the devices which broke down did it because of some overvoltage or anything electrical.