Wednesday, October 10, 2018

Cisco 5508 WLC Upgrade - 8.0 --> 8.5

Hello i need to upgrade some Cisco 5508 WLCs (HA SSO) from SW 8.0 to 8.5

normaly i would: FUS Upgrade, Upgrade from 8.0 --> 8.3 - wait till everything is working again --> Upgrade from 8.3 --> 8.5

but this brings a huge downtime.

so my question is, if it would be possible to:

1 .break HA

  1. config all AP for WLC-1

  2. upgrade WLC-2

  3. then config all aps for the upgraded WLC-2 - APs will donwload SW

  4. upgrade the WLC-1

  5. establish HA SSO between WLC-1 & WLC-2

  6. Done

this would reduce the Downtime.



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