Downgrade Software on Router That Runs Cisco IOS-XE SD-WAN to Classic Cisco IOS-XE Software A. IntroductionThis document describes how to perform a software downgrade on a router that runs Cisco IOS®-XE SD-WAN back to the original (ordinary/classic) Cisco IOS-XE software. B. ProblemThe user cannot configure boot system flash bootflash: image settings in order to boot the original Cisco IOS-XE i..