I have a Cisco 4500x-32SFP (with Enterprise License) with cat4500e-universalk9.SPA.03.04.04.SG.151-2.SG4.bin ios and i want to upgrade it to cat4500e-universal.SPA.03.11.03a.E.152-7.E3a.bin which is suggested by cisco :

  1. if i want to do this upgrade, do i lost my license key? can i perform an upgrade safely without any worry about license key ?
  2. i just do the simple upgrade process?
  • It's always a good idea to keep backups of any licenses -- esp. non-factory licenses. Systems do fail, and it's nice to have proof of what the device had.
    – Ricky
    Commented Jan 12, 2021 at 9:14

1 Answer 1


Copy your new IOS to device, then

conf t
boot system flash bootflash: cat4500e-universal.SPA.03.11.03a.E.152-7.E3a.bin
do write

Check your configuration

do show run | i boot

If you see there two or more boot statement, then delete all old statements:

no boot system flash bootflash:cat4500e-universalk9.SPA.03.04.04.SG.151-2.SG4.bin
do write

Now you should reboot your device.

  • do i need to backup license ? becaue i have enterprise license i do not want to lost my license, upgrade ios will keep the enterprise license?
    – Blackmetal
    Commented Jan 12, 2021 at 6:56
  • You won't loose license with update. Check your license after update and if there is any problem, you can boot previous IOS.
    – lbor
    Commented Jan 12, 2021 at 6:59

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