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GreatAlbatross

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Unable to connect 2/3 PC's to internet via tplink Switch

I was attempting to connect 3 PC’s (Personal and two servers) via the TL-SG105 un-managed network switch. Beforehand i just connected one server and the personal pc into another switch i have. But i got this switch to accommodate this new server. However it seems as soon as i plugged in and turned on the new switch all of a...

GreatAlbatross ,
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If it’s a 5 port TP link switch, it’s important to start it up connected to the upstream router on the first port.

If it does not receive DHCP info (being assigned an IP by your router) when starting up, it will perform DHCP itself, which will cause chaos if your main router is trying to do the same.

GreatAlbatross ,
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It could be something silly, like DNS on the edgerouterx still being set to the old ISP’s.
It could be that the ISP is still stabilising your line.
It could be that whenever the connection drops and reconnects upstream from the ERX, the ERX takes a few minutes to re-establish (or if your provider does not give you a static IP, recover from the external IP change).
Make sure you haven’t done something crazy like set the external port of the ERX to the same IP as the ISP equipment.

If you don’t have anything very complex, you could nuke the ERX and restart everything.
Or if your ISP runs on PPPOE, you could try bypassing the ISP router. (And also, if you’re using pppoe, make sure your MTU isn’t too high)

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