windows network PC issues seeing other devices

Hey all,

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Question for you, below are my setups for my home network

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PC > Router via WIreless (can see all computers on the network)

PC > Router via Ethernet (can see all computers on the network)

PC > Switch > Router via ethernet (cannot see any computers on the network)

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so am guessing there is an issue with connecting to the switch, however they all receive internet.

Any help would be great, thanks.