any idea what causes this error message:
UTC: %C4K_SWITCHMANAGER-4-S2WERRORREPORT: (Suppressed 5 times)PimEthAutoNeg: S2w Read/Write Error for port
Try reseating the modules affected. If you are not using PoE on the cards you can also disable the POE functionality by configuring "power inline never" on a the switchports. If this still doesn't help I would put in a TAC case.
If you have CCO access check out the info on the bug.