We have 2 brand new switches that we are trying to replace 2 old switches with.
We have 2 3CSFP91's that were operational in the original switches, but we cannot get them to function in the new 4200 switches.
The 3CSFP91's functioned just fine with the old switches and the fiber run between them. We are using the original fiber run.
If we put the original switches back into place with the 3CSFP91's, everything works.
Any ideas on how to get them to function with the new 4200G's? I have already gone in and enabled the ports and set the speed and duplex manually, and that has not helped.
Any assistance is greatly appreciated.