WLC 5508 redundancy question

[zyontrific]

Hi, I am pretty sure I know the answer to this but I am new to the world of wireless so wanted to check my sanity. In a new job we had some drop out issues on our wireless and by the time I could investigate it everything was OK. Still I had a look around and found that our HA pair of WLC5508's had failed over as the primary device was in MAINTENANCE mode. I checked on Cisco and it recommended a reboot to fix it. While I was filling out an RFC for the reboot I did the risk assessment and that's when I checked the 2 devices on what the RCA might have been.

I found what I consider something strange as they were running different code and different redundancy options. So is the following possible?

Primary - running 7.6.130.0 and SSO (Both AP and Client)

Secondary - running 7.4.100.0 and AP SSO

Looking at the Cisco site I can't see how these could have been a HA pair as the code should be the same level and the redundancy Mode too. So I have no idea how this would have worked prior to the failover. So would the fix be a reboot of the Primary and that then take control on the newer code then upgrade the Secondary to be on the same code and Redundancy Mode?

The worry is we are only running on a single WLC across a large campus but we may have been doing that anyhow.

Kind regards,

Z

[Scott Fella · Accepted solution]

They need to be on the same code.  What you can do is take the primary offline and downgrade that to v7.4.100.0 and then also factory default that unit.  Then bring it back with default configurations and enable SSO.  You can follow this doc:

http://www.cisco.com/c/en/us/support/docs/interfaces-modules/wireless-services-module-2-wism2/117729-configure-wlan-00.html#anc7

I would then upgrade to v7.6.130.0 on the primary unit, which you will force to be primary after you completed the steps in the link above.  Both WLC's will upgrade and everything should be fine.  Make sure there is a good cable between the two RP ports on the WLC's also.

-Scott

[zyontrific]

Scott,

Many thanks I will give that a go.

Z