Unable to successfully link gigabit adapters over MM fiber between a Cisco 3500XL switch and a new Cisco 2960 switch. Have tried configuring ports in sevral modes but none seem to work between the older Gigabit SX module an dthe newer SFP-SX module.
Tried the following:
>switchport mode dynamic desirable
>switchport mode access
>switchport mode trunk
>switchort trunk encap dot1q