We have 2 3560 switches connected via fibre using 1000BaseLX sfp modules and fibre cable.
One of the switches is constantly having issues with thousands of input errors on the Gigabit Interface and reliability at 160-170/255.
The Cisco SDM also reports over 3700 oversize packets.
All the above within a 14 hour period.
The switch at the other end of the connection is not showing any errors at all.
Sometimes the problem switch loses connectivity altogether and we have had to move the Fibre module from one gi port to another to get it back working.
There are no errors on the actual fa ports, just the gi.
We have swapped out with another switch and other Fibre modules, but still getting the same issues.
One thing I would say is, that, the room the switch is located in is "broom cupboard" size, has 4 PC's in it aswell and no air conditioning...could this be causing this problem or is their a problem with the fibre?
Just a quick question. You say you have swapped out the switch and the SPF/GBIC module. That was presumably the switch that is showing the errors. But did you swap the SPF/GBIC at the other end? In my experience, problems are more often found at the transmitting end, even if it is the receiver that is counting the errors. Though this is more likely to be the case with the cheap SX modules than with the LX modules you are using.
Now I'll have a look at your console output.