show boot Look for BOOT path-list to show your new image. write memory reload Confirm reload. The switch will reboot using the new IOS. Step 8 — Verify Upgrade After reload, log in and check:
copy flash:/c3750e-current-image.bin usbflash0:/c3750e-backup.bin Replace the filename with your actual current image. Copy the new image from the USB drive to the switch’s internal flash:
dir flash: Ensure the new file exists and shows the correct size. Tell the switch to use the new IOS on next reload: cisco 3750x ios upgrade via usb
List files:
Run:
dir usbflash0: You should see your .bin file listed. Before upgrading, copy the running IOS to the USB drive as a backup:
After copy, verify:
configure terminal boot system flash:/c3750e-universalk9-mz.152-4.E10.bin end Verify:
show file systems Look for usbflash0: — it should show as readable/writable. show boot Look for BOOT path-list to show your new image
copy usbflash0:/c3750e-universalk9-mz.152-4.E10.bin flash: This will take 3–10 minutes. .