Catalyst 3750 X Upgrade Access

Run an MD5 checksum check to ensure the file wasn't corrupted during transfer: verify /md5 flash:[new_image_name].bin .

| Consideration | Details | |---------------|---------| | | The 3750-X is EoL since 2018. Latest recommended IOS version is 15.2(4)E or later 15.2(x)E trains. | | Stacking | If stacked, all switches must run the same IOS version after upgrade. The master switch pushes the image to members. | | Bootloader | Ensure ROMMON is relatively recent (e.g., 15.0.1r). Older versions may fail to boot new IOS. | | License Level | The 3750-X uses universal images with license levels (IP Base, IP Services). Confirm current license via show license . | | Flash Memory | Minimum 64 MB free. Check with show flash: – the IOS image is ~25-35 MB. | catalyst 3750 x upgrade

Example filename: c3750e-universalk9-mz.152-4.E10.bin Run an MD5 checksum check to ensure the