CML EXCESSCOLL error on IOL-L2 switch

[Menachem E]

Hi, I keep getting collision errors on all the ports, even when they aren't connected to anything, but only on IOL-L2 switches. 

[MHM Cisco World]

Try hardcoded speed.

MHM

[Menachem E]

The speed command in missing.

[Ramblin Tech]

There is no actual CSMA-CD in CML's IOL-L2, only software emulation/approximation of that operation. Software emulation of hardware functionality is not always 100% accurate.

[Joseph W. Doherty]

What's the port stats for the other side's device?

The stats you've posted, shows the interface is running in full duplex mode, but you've 599 output errors, all collisions, which shouldn't be happening in full duplex mode (or so I believe).  Normally this indicates one side running in full duplex mode and the other in half duplex mode.

(Technically, excessive collisions indicate a frame could not be transmitted at all, because every transmission attempt failed until the retry count, 16, was exceeded.)

If it's a direct connection, and both CML devices are running full duplex, then as @Ramblin Tech describes, the issue likely with CML.  (Which version of it are you running?)