WiFi Tip: Upgrade Autonomous to LWAPP without the Upgrade Tool

Did you know that Cisco Autonomous access points can be upgraded directly to LWAPP access points without using the Upgrade Tool? It's true. Use this command:

archive download-sw /leave-old-sw /force tftp://ip-address/image

Then verify the system boot image was set correctly, which should happen automatically with the command above:

show boot

Then simply reboot the access point. The controller discovery mechanisms also need to be in place for the AP to find a controller over a layer 3 boundary.

The only real reason to use the Upgrade Tool is if you have a really old access point that was manufactured without a MIC (manufacturer installed certificate). In that case, the Upgrade Tool issues commands during the upgrade process to generate a Self-Signed Certificate (SSC) on the AP.