I have two Dell computers: one Optiplex 1710 and one PowerEdge T30. Both have Gigabit Ethernet, although IIRC they don’t use the same type/brand of Ethernet adapters.
My problem is that whenever I connect the computers to the Nokia gateway, they lose all connectivity. And by all connectivity, I mean they are not even accessible by other computers in the LAN. This is causing me lots of headaches, as I depend on both computers to do my work. It doesn’t matter what operating system I use (Windows 10, Windows Server, Linux, etc.), the problem persists.
I also have a work Mac (MacBook Pro, 15-inch from 2019), which is connected to the gateway via a TP-Link 8-port switch (mac → switch → gateway). The switch’s model is LS1008G. I do not have any connectivity issues at all with the Mac. It’s only the Dell computers the ones that are causing me headaches.
And yes, I’m using Gigabit-grade cables everywhere (Cat-5e or Cat 6).