I upgraded a WLC this morning from 184.108.40.206 to 220.127.116.11 using the method below.
Preload all APS. Checked and the new image was the backup. Swop backup to primary on the APs.
Shut the AP Mgmt SVI to trap at L3 and stop migrating to secondary controller.
Reload Controller to the new code then Open SVI.
At this point the APs came back, but on show ap image all, they showed only 18.104.22.168 as the primary image and no backup. At this stage im guessing the APS downloaded 22.214.171.124 from the controller but this prolonged the process.
At the point i reloaded the WLC, should i have issued the command to reload the APS?
Hi Leo, I preloaded the day before. All 50 APs showed the new image. If i reloaded the WLC the APs would fail straight away to the secondary controller and not upgrade. Im still not sure why this happened. As mentioned above, once they did come back with the 126.96.36.199 they quickly disappeared and then downloaded the software from the controller. This to me looks like the preload didnt work as planned.
(Cisco Controller) config>ap image swap all
(Cisco Controller) >exit ap image swap all config exit ap config q show ap image all
Total number of APs.............................. 48