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

With the rise of hardware-level attacks, Cisco hardened later ROMMON versions.

From a compliance perspective (PCI-DSS, HIPAA), running unsupported or legacy ROMMON versions can be a violation. Always keep ROMMON updated per Cisco’s security advisories.

Q: Does asr1000-rommon.173-1r.spa.pkg work on the ASR1001 (non-X)?
A: Yes, the ASR1001 (original) uses the same ROMMON binaries. However, older ASR1001 (with 2GB DRAM) may not support the full 17.x ROMMON. Always verify hardware compatibility with Cisco.

Q: Does upgrading ROMMON erase my configuration?
A: No. The running-config and startup-config are stored in a separate partition (NVRAM or bootflash variable). ROMMON upgrade is non-destructive to configurations.

Q: Can I use this file as a boot image?
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.

Q: My router says "ROMMON upgrade not supported" – why?
A: Some ASR1000 variants, especially older RP1 sub-modules, have soldered, non-upgradable ROMMON. In that case, you are stuck with an older version.

The asr1000-rommon.173-1r.spa.pkg is only a few megabytes in size – dwarfed by the gigabyte-sized IOS XE images. Yet, without it or with a corrupt version, your ASR 1000 is a paperweight. This file is the first instruction the CPU executes, the digital handshake that brings line cards to life, and your lifeline when all else fails. asr1000-rommon.173-1r.spa.pkg

Whether you are running a global backbone or a regional aggregation point, verifying and upgrading your ASR 1000 series ROMMON to version 173-1r is a low-risk, high-reward maintenance task. Don’t wait for a boot failure to discover you are running outdated, buggy firmware.

Action Item: Next time you log into your ASR 1000, run show rom-monitor. If the version does not read 173-1r, plan your upgrade window today.

asr1000-rommon.173-1r.spa.pkg ROM Monitor (ROMmon) firmware upgrade specifically designed for the Cisco ASR 1000 Series Aggregation Services Routers. Technical Summary

This package updates the low-level boot firmware that initializes hardware components (RPs, ESPs, MIPs, and SIPs) before the IOS XE operating system loads.

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:

It is widely used across the ASR 1000 family, including the ASR 1001-X, ASR 1002-X, and various Route Processors like the RP1 and RP2. Critical "Real-World" Considerations With the rise of hardware-level attacks, Cisco hardened

While this version is a necessary stepping stone for modern software, user experiences and technical logs highlight several important "gotchas": Known Upgrade Bug (CSCwa12192):

Upgrading to 17.3(1r) may cause some modules to enter a "disabled" state after the process. The RP2 Verification Error:

A specific bug (CSCvz87460) affects ASR 1002 routers with RP2 processors (specifically those with a Version Identifier of V07 or higher). Users often see a "FAILURE: MD5 signature does not match!"

error during the burning process, even if the file itself is not corrupted. Stability Mixed Reviews: Some users in the Cisco Community

report the upgrade getting "stuck" or failing on older RP1 modules, suggesting that unless your target IOS XE version strictly requires it, sticking with a stable older version like 16.3(2r) might be safer for older hardware. Boot Order Requirement: It is universally recommended by experts to upgrade the ROMmon first

and verify it with a reload before proceeding to the IOS XE software upgrade to prevent boot-looping. How to Use It Q: Does asr1000-rommon

To evaluate or install this package, you typically use the following command structure: CSCwa12192 - ASR1k 17.3(1r) ROMMON ... - Cisco Bug

Cisco Bug: CSCwa12192 - ASR1k 17.3(1r) ROMMON upgrade may cause module to go to "disabled" state. Cisco Bug: CSCwa12192. ASR1k 17. ASR1002-X Upgrade version path - Cisco Community

Here’s a useful, technical review of the ROMmon image file asr1000-rommon.173-1r.spa.pkg for the Cisco ASR 1000 series routers. This review is written from the perspective of a network engineer or administrator evaluating whether to deploy this version.

Certain IOS-XE releases (e.g., 16.9.x → 17.3.x) require a minimum ROMMON version to boot. Loading a newer IOS-XE on an old ROMMON results in a boot loop or kernel panic.

Example: IOS-XE 17.3.2 requires ROMMON 1.73(1r) or higher on RP2.

If you have the .pkg file on your bootflash and need to force an upgrade (for example, during a disaster recovery where the ROMMON is corrupted), you would typically use the upgrade rom-monitor command in privileged exec mode, pointing to the specific package file.

Note: Do not interrupt a ROMMON upgrade. It is a low-level flash operation; interrupting it can "brick" the Route Processor, requiring RMA.