THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.
Revision | Publish Date | Comments |
---|---|---|
1.0 |
04-Nov-10 |
Initial Release |
10.0 |
09-Oct-17 |
Migration to new field notice system |
10.1 |
22-May-18 |
Fixed Broken Image Links |
Affected Product ID | Comments |
---|---|
CISCO1941/K9 |
|
CISCO2901/K9 |
|
CISCO2911/K9 |
|
CISCO2921/K9 |
|
CISCO2951/K9 |
|
CISCO3925/K9 |
|
CISCO3945/K9 |
Defect ID | Headline |
---|---|
CSCte82086 | ISR G2 1900 or 2900 may not respond to break on RJ45 & USB console |
Routers with ROMMON version 15.0(1r)M1 fail to respond to the break sequence command received from a device connected to the console port. This failure prevents normal password recovery of the device.
The Cisco IOS® password recovery process requires the user to send a break sequence keystroke during the initial ROMMON boot sequence to break out of the boot process. The user then sets the configuration register to ignore the Cisco IOS start-up configuration, providing the ability to reset the system password in the Cisco IOS.
Affected products with ROMMON version 15.0(1r)M1 ignore the break sequence during bootup. If the Cisco IOS configuration is set to ignore the control break sequence, the ability to reset the password remotely is lost.
On bootup when the Ctrl+Break sequence is sent via the console, the device does not drop to ROMMON but rather continues to boot the Cisco IOS image normally. This is a result of the signal being ignored.
Problem/Solution
Download and install the updated version according to the platform family shown in this table:
C3900 | 15.0(1r)M8 |
---|---|
C2900 | 15.0(1r)M6 |
C1900 | 15.0(1r)M6 |
Note: The 15.0(1r)M8 ROMMON update for the C3900 series contains additional functionality specific to the C3900 series. While updating, it is recommended that the system be updated to the most current level.
Downloading the Image
Complete these steps in order to download the image:
Installing the Upgrade Version
The ROMMON image can be installed from any local storage device or remotely using standard transfer protocols. Using the upgrade rom-monitor file command, point to the target image. Once the system verifies the ROMMON image, you are prompted to initiate a power on reset of the system; select yes.
After erasing and programming the boot flash, the system reloads. Verify the proper ROMMON version is loaded using the show version command as shown in this image:
If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:
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