Upgrade Cisco 3850 firmware

These steps are from a high level view and cover the overall process.  Some steps are omitted. 

Download the IOS and place it on a thumb drive, or tftp etc.

copy tftp://yourtftpsite/cat3k_caa-universalk9.SPA.03.07.05.E.152-3.E5.bin flash:
(this may take several minutes to complete)

When complete:

software install file flash:cat3k_caa-universalk9.SPA.03.07.05.E.152-3.E5.bin

After reboot/reload etc.

software clean

After the switch is back up, if you have a stack type:

show switch

If there is a mismatch you can enable auto-upgrade. So all switches added get the later version and “match” the stack.

software auto-upgrade enable

You must reload the newly added switch only; a full stack reload is not necessary. In this case, the newly added switch is switch 3, so the reload slot 3 command is entered.
Tip: The slot mentioned in these commands designates the switch in the stack (slot 1 = switch 1).


reload slot 3

Proceed with reload?