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9 июля
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bodisEx (Сегодня, 15:31, просмотров: 47) ответил SciFi на Очевидно же. Там же на фотке видно трёхпортовый свич.
Тогда зачем реле? 

https://www.chipdip.ru/product/ksz8863rlli-tr-3-portovyy-ethernet-kommutator-microchip-9001387461

KSZ8863MLL/FLL/RLL also offers a bypass mode that enables system-level power saving. When the CPU (connected to port 3) enters a power saving mode of power down or sleeping mode, the CPU can control pin 24 SMTXER3/MII_LINK_3, which can be tied high so that KSZ8863MLL/FLL/RLL detects this change and automatically switches to the bypass mode. In this mode, the switch function between port 1 and port 2 is sustained. The packets with DA to port 3 are dropped and bypass the internal buffer memory, making the buffer memory more efficient for data transfer between port 1 and port 2.