Just want to hightlight - the Fabric Manager upgrade is NOT throught the typical "switch type" firmware upgrade using the "firmware script". It is actually through the ZTP+ process.
So, you need to:
- uploade firmware as usural via XMC GUI: Network -> Firmware -> SCP method
- navigate to the newly upload firmware image, Under Device -> Fabric Manager -> Fabric Manger
- right click and "set as reference image"
This will trigger the ZTP+ to upgrade.
Thanks, Gates