Cisco ISR4331 – configure terminal command is not supported

New unboxed Cisco ISR4331, command configure terminal didn’t work. Looks like the router is booted in controller mode by default. To get back to “legacy” mode you need to disable controller mode.

Router#conf t
This command is not supported
Router# controller-mode disable
Disabling controller mode will erase the nvram filesystem, remove all configuration files, and reload the box!
Ensure the BOOT variable points to a valid image
Continue? [confirm]
% Warning: Bootstrap config file needed for Day-0 boot is missing
Do you want to abort? (yes/[no]): no
 Mode change success

Wait a few minutes, router will reload.

Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.


  1. Could you share version of IOS? If this is SD-WAN version its looking for the controller for configuration. You mat been the IOS-XE instead.

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