Asr1000-rommon.173-1r.spa.pkg Jun 2026

Optimizes driver support for modern high-capacity USB drives and updated internal eUSB/SSD solid-state storage modules. Hardware Compatibility

Always save your configuration: copy running-config startup-config 4. How to Upgrade ROMMON (17.3(1r))

On a live ASR1000, run:

ROMMON updates do not take effect until a reload . You must reboot the router for the new firmware to load. asr1000-rommon.173-1r.spa.pkg

Once the router completes its boot cycle, confirm that the new ROMMON version is active. Run the following command: Router# show rom-monitor slot R0 Use code with caution.

A: No. You cannot boot IOS-XE from a ROMMON .pkg file. You must still specify an IOS-XE .bin or packages.conf in BOOT variable. The ROMMON only loads that.

If the MD5 checksum fails during transfer, delete the package from bootflash: and re-download it. A corrupted ROMMON file will fail the internal security checks and refuse to execute. Optimizes driver support for modern high-capacity USB drives

The ROMMON upgrade process, while generally straightforward using the upgrade rom-monitor filename command, requires patience and potentially multiple reload cycles to complete successfully. When issues arise, the Cisco support community and bug search tools provide valuable troubleshooting resources for resolving upgrade failures and compatibility problems.

Essential for running Cisco IOS XE Amsterdam 17.3.x, Bengaluru 17.4.x, 17.5.x, and later releases securely.

You need a hardware programmer (JTAG) or RMA the RP. This is why redundant RPs are critical. Always upgrade one RP at a time in a dual-RP chassis. You must reboot the router for the new firmware to load

The Cisco Aggregation Services Router (ASR) 1000 Series serves as the cornerstone of enterprise headends and service provider edge networks. To maintain performance, security, and compatibility with modern Cisco IOS XE releases, upgrading the Read-Only Memory Monitor (ROMMON)—essentially the hardware's BIOS—is a critical administrative task.

ROMMON version: System Bootstrap, Version 15.6(1r)S2, RELEASE SOFTWARE ROMMON version on RP0: 15.6(1r)S2 ROMMON version on RP1: N/A

17.3(1r) is an older release, typically required as a baseline for running newer versions of Cisco IOS XE (such as the 17.x series). Hardware Compatibility: