dir flash: Ensure the new file exists and shows the correct size. Tell the switch to use the new IOS on next reload:
List files:
Run:
configure terminal boot system flash:/c3750e-universalk9-mz.152-4.E10.bin end Verify: cisco 3750x ios upgrade via usb
dir usbflash0: You should see your .bin file listed. Before upgrading, copy the running IOS to the USB drive as a backup: dir flash: Ensure the new file exists and
After copy, verify: