On Mon, 2020-02-10 at 22:31 +0000, Patrick O'Callaghan wrote:
I switched the cable that came with the router for the Cat-6 I was using when this problem arose originally, but without changing the port.
It's now running at 1000Mbps. Clearly the (new) cable was at fault.
Good to hear. It's a wonder that network cables aren't the cause of more things, or perhaps it's not even realised the network isn't running properly (chances are some people won't notice that their network is running at 100 Mbs instead of 1000). Cables get dragged about, badly kinked, crushed against the wall, and equipment-supplied ones can be crappy. I've got one that came with equipment that has 8 thin parallel wires, none of them are twisted together.
And I've got a weird ISP-supplied router with 1 Gbs port and 3 100 Mbs ports. Quite why anyone would build something like that, I don't know. And it's hard to tell which is the gigabit port, there's no printing, just tiny indented writing on white plastic.