FUS Update - why and whe needed

[nt0000001]

Hello everybody,

Short question 🙂

I want to update IOS on 5508 WLC from 7.0.x to 8.0.x (AP 1242 & 3502)

Should I upgrade the FUS also ? Why ? I need to argument to get larger time slot so i need a good reason...

Why is this needed, I read that the AP can get a strange behaviour ...

(already posted that many neighbour AP are on same channel and same Power, it might be the reason ! )

Thanks for any explanation

[Sandeep Choudhary]

Hi,

Its not a must but Cisco recommend to install on WLCs.

Cisco Wireless LAN Controller (WLC) Field Upgrade Software (FUS) is a special AES package that performs various system-related component upgrades. Cisco recommend that you install the FUS image to upgrade components such as the bootloader, field recovery image, FPGA/MCU, and other firmware to their latest respective versions.

Regards

Dont forget to rate helpful posts

[nt0000001]

Thanks

I read fr the recommendation but in reality what does it get better with it or worst without it...

I'll wait for few more answers, cause the production-cut time slot is not the same for IOS upgrade and FUS+IOS so I need a heavy argument.

[nt0000001]

OK subject closed, it will be difficult for me to justify 1h daily production-cut

thanks to all

[Flavio Miranda · Accepted solution]

Hello,

  If you´d like to hear some tangible facts, I saw WLCs start rebooting after AirOS upgrade with old FUS.

Good practices are good practices, follow them!