Cisco IOS upgrade
2900>enable 2600#copy tftp: flash:/flash0:/flash1: Address or name of remote host []? 10.10.10.1 Source filename []? c7200-adventerprisek9-mz.124-22.T Destination filename[c7200-adventerprisek9-mz.124-22.T]? c7200-adventerprisek9-mz.124-22.T file will upload and after finish upload enter below command 2900(config)#boot system flash:c2600-adventerprisek9-mz.124-12.bin