WLC5508 upgrade:Failure while validating the signature!

[Rps-Cheers]

Hi everyone, Do you have occurred this issue? WLC software:7.4 FUS:1.9 When we transfer image to wlc,there is the error as below: ------------------------------------------------- This may take some time. Are you sure you want to start? (y/N) y FTP Code transfer starting. FTP receive complete... extracting components. Failure while validating the signature! FTP Failure while storing in flash! (0) ------------------------------------------------- Is there any workaround except RMA?

[marce1000]

>Any workaround except RMA

 - Depends , can you still boot the controller ? As for the initial transfer error, verify the MD5-sum for the originial download (of the FUS package).

M.

[Rps-Cheers]

yes，we cannot upgrade it，it can boot this time，the md5 verify is ok

[marce1000]

 - Can you post the output of show certificate all ?

M.

[Rps-Cheers]

there is no this command in wlc5508

[marce1000]

 - Check the below thread completely  , review all advises and actions :

https://community.cisco.com/t5/other-wireless-mobility-subjects/wlc-5508-failure-to-upgrade-code/td-p/1582692

M.

[Rps-Cheers]

thanks for your response！
emmm，i have read this discussion before.But there is not helpful yet

[superego]

Try to reboot the device and do an MD5 checksum on the FUS file.

FUS 1.9

• This release of the Field Upgrade Software is applicable to Cisco WLCs that are installed with the controller software release 6.0 and later.

Release Notes:

https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/fus_rn_OL-31390-01.html

[Rps-Cheers]

the wlc has FUS 1.9，and do not need upgrade it，we need upgrade wlc image from 7.4 to 8.0，we have occurred that issue after we transfer image complete.

[Leo Laohoo]

Try reloading the controller first and then do the upgrade again.

[Rps-Cheers]

we have replaced the controller.
thanks