I have got a Layer 3 switch 3550 connecting to an Optical Laser unit at 2 buildings.
When the laser connects to the switch with its utp cable the port does not come up when I use the Later versions of IOS ie Version 12.1(12)EA1 and later up to 12.1(14)EA1.If I downgrade the switches to Version 12.1(11)EA1 it works and picks up the Laser units.
Is this a possible IOS bug.I cant upgrade my switches now because of this problem.Will the later version of software after 12.1(14)EA1 have a fix for this problem.Below is the version that is working with the Laser units at present.
Any ideas would be useful.
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I5Q3L2-M), Version 12.1(11)EA1, RELEASE SOFTWARE (fc1)
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