Cat4500e-universalk9.spa.03.11.00.e.152-7.e.bin Site

: Step-by-step instructions for performing the system software upgrade. Key Technical Details

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You can jump from 3.X to 16.X , as per my understand Cisco sto developping denali code that is 3.X. they are more focussing on 16. Cisco Community cat4500e-universalk9.spa.03.11.00.e.152-7.e.bin