I'm trying to update software of vWLC (small scale version to 8.3.143.0)
Below is the current show sysinfo.
(Cisco Controller) >show sysinfo
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.2.141.0
RTOS Version..................................... 8.2.141.0
Bootloader Version............................... 8.3.15.96
Emergency Image Version.......................... 8.0.140.0
Build Type....................................... DATA + WPS
As per Cisco,
"If your Emergency Image Version is prior to 8.1, we recommend that you upgrade to Cisco Wireless Controller Field Upgrade Software, Release 1.10.0.0, for the following platforms:
- Cisco Flex 7500 Series Wireless Controllers
- Cisco 8500 Series Wireless Controllers
- Cisco Virtual Wireless Controller"

By looking at show sysinfo,
Emergency Image Version 8.0.140.0, yes FUS needs to be updated to 1.10.0.0
HOWEVER, bootloader version is already at 8.3.15.96 and I’m not quite sure how that version got up to 8.3. (assuming 8.1.102.0 is the highest from FUS 1.10.0.0.)
is my vWLC FUS is up to date? or need 1.10.0.0 FUS upgrade?