Just installed a new 2960 switch.
Everything is working except that I am no longer to uplink a small unmanged linksys switch that is leftover from previous configuration.
I am using x-over cable and have tried adjusting switchport modes.
If I use a straight through cable, The link goes up and down constantly. If I use a x-over cable, the link stays up but no communications.
What am I doing wrong?
I would guess that the problem your having is a line speed negotiation problem. Without the specific models numbers of the equipment and the ports being used on the equipment for the uplink, it is just a guess.
All Linksys switches auto cross over. While this function can be disabled (on most models), it should not be an issue.
You may be plugging your Linksys into the 10/100/1000 of the 2960 which may be confusing the Linksys terribly if it is only 10/100. Try one of the 10/100 ports on your 2960 or statically set the line speeds on one or both devices, where available.
Get those model and port numbers and we will look deeper.