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Can I pass WAN and LAN traffic through the same ethernet cable? (alien.top)

submitted 2 years ago by specialized_faction@alien.top [B] to c/homenetworking@selfhosted.forum

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My parent's have their ONT inside a basement cabinet, where all the house ethernet cables terminate. One of those cables runs up to their office, where the main Wi-Fi router is located (Plume homepod provided by their ISP).

Could they setup their network similar to what's shown in the diagram where the WAN and LAN traffic passes through the same ethernet cable? If so, are there any specific network settings that should be enabled to prevent any issues?

https://preview.redd.it/wqvuy427vz2c1.jpg?width=691&format=pjpg&auto=webp&s=4f3cc265ddef6b894df39f9339cfc9ce118159dc

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[–] Yo_2T@alien.top [B] 1 point 2 years ago (1 child)

This is old, but the diagrams in the first answer show you how to tag the ports to get the same setup as you described above:

https://superuser.com/questions/789294/can-i-send-a-wan-and-lan-connection-over-the-same-cable

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[–] specialized_faction@alien.top [S, B] 1 point 2 years ago

Thanks! Does this create any risk for network issues that I should be aware of?

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