Asr1000-rommon.173-1r.spa.pkg -

As with all firmware updates, the 173-1r package fixes potential boot-time security vulnerabilities and improves the reliability of the hardware initialization process, ensuring that the router starts up consistently in high-availability scenarios. Preparation: Pre-Upgrade Checklist

Download asr1000-rommon.173-1r.spa.pkg from Cisco Software Download center under "ASR 1000 Series" → "ROMMON Firmware". asr1000-rommon.173-1r.spa.pkg

: After upgrading IOS-XE to version 17.6.3a with ROMMON 17.3(1r), the router may display "Invalid input detected" logs and interfaces remain "admin down". As with all firmware updates, the 173-1r package

Ensure your target boot storage has enough free space to accommodate the new package file (typically under 100 MB). Router# dir bootflash: Use code with caution. Ensure your target boot storage has enough free

The 17.3(1r) release is a major milestone for the ASR 1000 series, often required for compatibility with modern Cisco IOS XE 17.x software branches A critical characteristic of this version is its irreversibility

upgrade rommon filename bootflash:asr1000-rommon.173-1r.spa.pkg 4. Verify and Reload