hello
I tried this on my lab the uplink from my router to switch, I set no auto and 10m and it does not work, i even bounced the port
however i dont that is a solution. for one i would have to coordnate with our carrier to change all the ports. and not all of them are so easy
some are 10mb on 1g port some are on 100m ports, some are 20m on 1g ports and a couple 250mb on 1g ports
20 and 250 are not an option