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A comment on The Cheap 2.5GbE Poe Unmanaged Switch (2022). Parent comment

Re:The Cheap 2.5GbE Poe Unmanaged Switch (2022) by duskwuff on Saturday October 08, 2022 @03:22AM (#33130478)
I would be surprised if this device had any firmware at all. It's an unmanaged switch; most of the device's behavior is embedded in the switch IC.
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Re:The Cheap 2.5GbE Poe Unmanaged Switch (2022) by pabs3 on Saturday October 08, 2022 @03:51AM (#33130592)
So the backdoor is in the switch IC? :)
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Re:The Cheap 2.5GbE Poe Unmanaged Switch (2022) by oliv3r on Saturday October 08, 2022 @04:18AM (#33130689)
Yes they do. I have an ZyXEL XGS1010-12 (unmanaged) and it also runs Linux. The switch chip must be initialized, and the realtek SDK is based on Linux.

You could do it with just an eeprom afaik, but seems to be actually more effort (and not possible on all of realtek's switch chips).

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