topic Re: WLC 5508 FUS upgrade in Wireless

WLC 5508 FUS upgrade

Andrew White — Mon, 05 Jul 2021 17:32:34 GMT

Hello,

I've upgraded our WLC to 8.5.140.0 this weekend and all is good.

Cisco then said to do the FUS. So today I've uploaded 'AIR-CT5500-K9-1-9-0-0-FUS.aes' so we can reboot at the weekend.

However when I go to the WLC I see:

(Cisco Controller) >show boot
Primary Boot Image............................... Error (default)
Backup Boot Image................................ Error (active)

This doesn't look good does it?

Thanks

Re: WLC 5508 FUS upgrade

Jonas Kalldert — Mon, 10 Jun 2019 15:25:31 GMT

Hi,

That does indeed not look good. I would suggest opening a TAC case before rebooting the controller.

But I must say I have never done a show boot before a reboot for a FUS upgrade so this may be normal. But I would open a case eater case. Better safe then sorry in this case sens a faulty FUS upgrade will often result in a bricked WLC.

regards,
Jonas
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Re: WLC 5508 FUS upgrade

Andrew White — Mon, 10 Jun 2019 15:54:13 GMT

TAC case is open, so waiting for them now.

I might be normal. However I've never upgraded the FUS before or ran the show boot command straight after uploading.

I will let you know the outcome.

Re: WLC 5508 FUS upgrade

Leo Laohoo — Tue, 11 Jun 2019 07:25:55 GMT

If the FUS was already running the latest FUS code, uploading the same version may cause issues.

Re: WLC 5508 FUS upgrade

Andrew White — Tue, 11 Jun 2019 12:36:38 GMT

We have never updated to FUS since we installed the WLCs about 2.5 years ago. Cisco say this is normal and will be ok after a reboot.