Upgrade from firmware version 7.1.91.0 to a latest stable one

[Prince K Mathew]

Hello,

We are running WLC 5508 with software version 7.1.91.0. We have recently run into bug CSCua29504 which prevents Windows 8 devices from joining the SSID which is configured with WPA/WPA2 with AES. Can someone suggest me a latest stable version to which i can upgrade our system.

Thanking you in advance.

Prince Mathew
 

[Leo Laohoo · Accepted solution]

You could try 7.4.121.X or 7.6.110.X.   Read the Release Notes to ensure you know what bugs are there.

Make sure you upgrade the FUS code too.

[Rasika Nayanajith · Accepted solution]

I would go for 7.4.121.0 with FUS upgraded to 1.9.0.0. 

Here is the release notes you should read prior to upgrade

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

2. http://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn74mr02.html

At least get 45min outage window if you want to perform both upgrades.

HTH

Rasika

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[Prince K Mathew]

Thanks Leo & Rasika.

I shall try your suggestion during next downtime. Is there a specific order which i should be following while upgrading? Software first and then FUS code?

Thanks,

Prince Mathew

[Rasika Nayanajith]

Either way it will work, I prefer FUS upgrade first & then WLC software.

HTH

Rasika

[Prince K Mathew]

Okay. Thanks for the prompt response.

Prince Mathew

[Prince K Mathew]

Hi Rasika,

What does FUS code refers to? Is it the system boot image? Which command do i need to issue in order to verify it?

Thanks,

Prince

[Leo Laohoo]

FUS stands for Field Upgrade Software.  

It's actually another TLA (three-letter acronym) and is synonymous to the word "bootstrap".  

The Release Notes and the procedure about how to upgrade FUS code can be found HERE.

[Prince K Mathew]

Is it Field recovery image version? Can you confirm it from my controller image?

[Leo Laohoo]

Nope.  It's not the same.   You will need to upgrade all the FUS before you hit the latest one.

[Prince K Mathew]

How can i find out the current FUS Code version? The field recovery image version is 6.0.182.0

[Leo Laohoo]

FUS and field recovery are two different things.  I'd concentrate more on the FUS.

[Prince K Mathew]

Okay. How do i find out current FUS code ? Thanks!!!

[Leo Laohoo]

Downloading Field Upgrade Software

[Prince K Mathew]

I am sorry, looks like i have mislead you. I wanted to know the current FUS code running on my controller. Is there a way i can get to know that?