I had a patch cable connecting directly to a net gear switch, it was happy with a gigabit connection.

Now i’ve extended the connection to the switch with ~14m of cat6 with a krone to rj45 connector rated cat6 on each end. Now the port connecting to my broadband will only run at 100mbps.

I don’t see any obvious issues with the connections or cable, and all of the patch cables in the network are capable of handling gigabit speeds.

Does anyone have any advice on how to troubleshoot this?