After transferring the file via TFTP or SFTP, verify its MD5 checksum against Cisco’s official software download portal to prevent corruption during transit. Router# verify /md5 bootflash:asr1000-rommon.173-1r.spa.pkg Use code with caution. 4. Step-by-Step Installation Procedure
Manually boot the system using the emergency boot command: rommon 1> boot bootflash:packages.conf Use code with caution. If you are planning an upgrade, let me know: Your current hardware model (e.g., ASR 1001-X, ASR 1006). The Cisco IOS XE version you are upgrading to. asr1000-rommon.173-1r.spa.pkg
Use the following command to check your current ROMMON version: show rom-monitor After transferring the file via TFTP or SFTP,