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2 routers, 2 separate networks, 1 modem… how? (lemmy.ml)

submitted 10 months ago by TaintPuncher@lemmy.ml to c/networking@sh.itjust.works

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Hey all, I was wondering if anyone could help me work out how to do this? Basically, I have a stupid number of smart devices and my router has become increasingly unstable. I want to have all my IOT devices on one router and reserve the other for priority devices like phones and PCs.

I plan to put my IOT hub on 2G only and my primary hub on 6G and 6e only to avoid 2G congestion.

Problem is, if I connect both my routers to my modem, only one can connect to the internet. I tried putting a network switch between the routers and the modem, no dice.

Does anybody know how I can have 2 separate networks using 2 separate routers on a single modem? Both require internet connection but they don’t need to be able to communicate.

Thanks in advance for any help people can give :)

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[–] cynar@lemmy.world 6 points 10 months ago

I've found cheaper routes tend to crap out due to numbers, not just load. I'm not sure what's actually causing it, but it's not network congestion due to traffic.

Best I can tell, it's overhead congestion. They try and give each device a chance to talk. Unfortunately they don't multitask this well. IoT devices are a little notorious for being slow to respond (because of sleep modes etc). With enough of them, this can leave critical devices with a long lag time before they get a proper window.

Most routers that can handle vlans can more than handle this issue. My ubiquiti router blazes along, and it's under a far worse load than my cheap provider's router was failing under.

I've got the ubiquiti dream machine and it's been bombproof so far.