I just purchased four brand new ISR4221 routers as part of an Academy lab set up. I can get them to boot fine, can enter user exec mode and privileged exec mode. However, when I try and enter global configuration mode, I get a command not supported error message. I also get that message if I issue a copy run start or erase startup config command. I am stuck at this point. I have worked with Cisco routers for 20 years and have never had any of them act this way. I have searched the blogs and the internet and cannot find a solution. Any ideas would be greatly appreciated.
Thanks for sharing your experience with this problem. Several earlier posts in this discussion have identified the issue of an SD WAN image and access to config mode. Did your experience with controller mode disable also involve a new image (standard image) or are you still using the original (SD-WAN) image?
our task were to change the SD-WAN image on the router to standard IOS image to do that i was not able to going in the configuration mode with the SD-WAN image. When i type „configuration terminal“ got an error message this command isn’t supported. So in this case i have disabled the controller mode with the command „ controller mode disable „ then hit enter twice and reload the router. After that i could go normally in configuration mode and change the IOS version to standard one as requested. Regards
