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New Member

WLC 5508 AP SSO FUS Upgrade with different Versions

Hi everybody,

I've got two 5508 configured as AP SSO and I want to upgrade the FUS to 1.9.0.0
The Image running is 7.6.110.0

On the active controller the FUS Version is 1.3
On the HA-SKU controller the FUS Version is 1.7

Now, can I upgrade the FUS to 1.9.0.0 using the GUI, even when both controllers don't use the same FUS Version? If yes, can I go directly from FUS 1.3 to 1.9.0.0?

thanks a lot,
marc

6 REPLIES
Hall of Fame Super Gold

On the active controller the

On the active controller the FUS Version is 1.3

You may need to break HA and upgrade the active controller to FUS 1.7.  Once the active controller is upgraded to this version, you enable HA.  Only then can you upgrade the pair to 1.9 via GUI.  And when you do this, the active controller will "push" the FUS 1.9 to the hot-standby unit independently.

New Member

What about the following

What about the following procedure:

1. Upgrade FUS to 1.9.0.0 on Standby via CLI.

2. force-switchover active role to upgraded standby controller.

3. Upgrade FUS to 1.9.0.0 on the standby controller (active before) via CLI.

4. force-switchover back to initial situation.

So there is a minimal downtime for the AP's (Just when switchover twice)

VIP Purple

Hi,Your process could work

Hi,

Your process could work but I am not sure.

To be 100% sure then You must break HA. Upgrade FUS and then join again.

Regards

Dont forget to rate helpful posts

New Member

Unfortunately its not

Unfortunately its not possible to upgrade just the standby controller in a AP SSO setup. The Command "transfer" is not available on the controller with the standby role. :-/

I don't get it, why it's not possible to upgrade either FUS oder Software in a AP SSO setup without downtime. The reason why people use AP SSO is because they have a sensitive wireless environment (24/7) and care about not having some downtime. Hopefully there will give some improvements in future releases in case of downtimes when upgrading.

Hall of Fame Super Gold

1. Upgrade FUS to 1.9.0.0 on

1. Upgrade FUS to 1.9.0.0 on Standby via CLI.

I do not believe it is a good idea to go from FUS 1.3 to FUS 1.9 without going through FUS 1.7.

New Member

Unfortunately its not

Unfortunately its not possible to upgrade just the standby controller in a AP SSO setup. The Command "transfer" is not available on the controller with the standby role. :-/

I don't get it, why it's not possible to upgrade either FUS oder Software in a AP SSO setup without downtime. The reason why people use AP SSO is because they have a sensitive wireless environment (24/7) and care about not having some downtime. Hopefully there will give some improvements in future releases in case of downtimes when upgrading.

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