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Cake day: June 19th, 2023

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  • My thoughts are:

    • With PoE you’re doing 2 conversions which could waste more power, AC to 48V at the switch, and then 48V down to whatever the device needs with it’s internal buck converter. You also have slightly more losses on the longer run of low voltage 48V DC through ethernet, vs AC.

    On the other side of things:

    • With PoE you only have 1 AC-DC conversion happening, every wall wart power adapter has an idle power draw even without a load attached to it. With PoE you just have the single switch power supply wasting power.

    Overall I doubt the difference will be large enough to matter, and some PoE switches are quite power hungry even with nothing plugged in for some reason, so could end up costing more.



  • You can still do the setup nearly the same, but you’ll need to change the opnsense LAN to its own unique subnet, and put PC2 on that subnet with a manual IP setup.

    Make sure you don’t enable DHCP on opnsense too, since that will really interfere with the existing router.

    The only real downside to this, is PC2 traffic to access PC1 or other devices on the main router, will have to go through opnsense and you’ll need firewall rules for that.