Field Notice: FN - 63848 - ASR 901 1G Platform - Software Release Upgrade Required for Cisco IOS Release Versions: 15.4(1)S, 15.4(1)S1 and 15.4(2). - Software Upgrade Recommended

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Updated:July 11, 2014
Document ID:FN63848

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Notice

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 History

Revision Publish Date Comments
1.0
10-Jul-14
Initial Release
10.0
13-Oct-17
Migration to new field notice system

Products Affected

Affected OS Type Affected Release Affected Release Number Comments
IOS
15.4
15.4(1)S,15.4(1)S1,15.4(2)S

Defect Information

Defect ID Headline
CSCuo85100 Fix for ASR 901 1G Platform rebooting automatically below -20 degree Celsius (-4 degree Fahrenheit)

Problem Description

Cisco has identified an issue with the 901 1G Series Aggregation Services Router (ASR) platforms (listed in the Products Affected section) that run Cisco IOS® Versions 15.4(1)S, 15.4(1)S1, or 15.4(2)S. This issue causes the system to become stuck in a continuous reboot cycle at temperatures below -20 degrees Celsius (-4 degrees Fahrenheit).

 

 

Cisco recommends that you upgrade the software to one of the latest Cisco IOS versions (15.4(1)S2, 15.4(2)S1, or later releases). Refer to the Workaround/Solution section for details about the recommended Cisco IOS versions, based on the version that your ASR 901 1G platform currently runs.

 

 

Note: This issue only impacts the products that are listed in the Products Affected section. The 901 10G Series ASR platforms (A901-6CZ-F-A, A901-6CZ-F-D, A901-6CZ-FS-A, A901-6CZ-FS-D, A901-6CZ-FT-A, and A901-6CZ-FT-D) as well as the 901S Series ASR platforms (A901S-3SG-F-D, A901S-3SG-F-D, and A901S-4SG-F-D) are not impacted by this issue.

 

Background

The affected products that run Cisco IOS Versions 15.4(1)S, 15.4(1)S1, or 15.4(2)S have an issue with the micro-controller version that causes the board sensor to read the temperatures below -20 degrees Celsius (-4 degrees Fahrenheit) incorrectly. This causes the routers to become stuck in a continuous reboot cycle.

 

 

This issue is resolved in the latest Cisco IOS versions (15.4(1)S2, 15.4(2)S1, and later versions).

 

Problem Symptom

The affected products that encounter this issue raise a false alarm at temperatures below -20 degrees Celsius (-4 degrees Fahrenheit), followed by a continuous reboot of the router.

Workaround/Solution

The latest Cisco IOS versions are available as a solution to this issue.

 

 

If you have installed in your network one of the ASR 901 1G platforms that currently runs a Cisco IOS version that is listed in the next table, and if the router or Cisco IOS version is impacted by this issue, then Cisco recommends that you upgrade to the corresponding Cisco IOS version.

 

 

ASR 901 Router# Current IOS Release Impacted by the Issue? Recommended IOS Release Version
A901-12C-FT-D or A901-12C-F-D or A901-4C-FT-D or A901-4C-F-D 15.3(3)S or earlier versions No Not Applicable
A901-12C-FT-D or A901-12C-F-D or A901-4C-FT-D or A901-4C-F-D 15.4(1)S Yes 15.4(1)S2
A901-12C-FT-D or A901-12C-F-D or A901-4C-FT-D or A901-4C-F-D 15.4(1)S1 Yes 15.4(1)S2
A901-12C-FT-D or A901-12C-F-D or A901-4C-FT-D or A901-4C-F-D 15.4(2)S Yes 15.4(2)S1
A901-12C-FT-D or A901-12C-F-D or A901-4C-FT-D or A901-4C-F-D 15.4(3)S or later versions No Not Applicable
A901-6CZ-F-A or A901-6CZ-F-D or A901-6CZ-FS-A or A901-6CZ-FS-D or A901-6CZ-FT-A or A901-6CZ-FT-D Any Release Version Not Applicable Not Applicable
       

 

Additional Information

I have an ASR 901 1G platform that runs Cisco IOS Version 15.3(3)S. Will I be impacted by this issue?

 

No. This issue only impacts the ASR 901 1G platforms that run Cisco IOS Versions 15.4(1)S, 15.4(1)S1, or 15.4(2)S.

 

 

My ASR 901 1G platform runs Cisco IOS Version 15.4(1)S (since the initial release in November 2011) without any issues. Should I upgrade to the latest Cisco IOS version?

 

Yes. Cisco recommends that you upgrade to Cisco IOS Version 15.4(1)S2 in order to avoid future issues.

 

 

I plan to purchase a new ASR 901 1G platform. Will I be impacted by this issue?

 

No. This issue only impacts the ASR 901 1G platforms that run the aforementioned Cisco IOS versions. All of the new ASR 901 1G platforms are shipped with the latest Cisco IOS version that has the updated micro-controller release. This issue does not affect the new platforms.

 

 

I plan to purchase a new ASR 901 10G platform. Will I be impacted by this issue?

 

No. This issue only impacts the current ASR 901 1G platforms. All of the ASR 901 10G Series platforms (A901-6CZ-F-A, A901-6CZ-F-D, A901-6CZ-FS-A, A901-6CZ-FS-D, A901-6CZ-FT-A, and A901-6CZ-FT-D) as well as the ASR 901S Series platforms ( A901S-3SG-F-D, A901S-3SG-F-D, and A901S-4SG-F-D) are not impacted by this issue.

 

 

Will there be any feature changes between the Cisco IOS version that my platform currently runs and the recommended IOS version?

 

No. The recommended Cisco IOS versions are exactly the same as the current Cisco IOS version that runs on your ASR 901 1G platform, in regards to the features.

 

 

Can I reuse the licenses that are installed for my current Cisco IOS version?

 

Yes. When you upgrade to the recommended Cisco IOS version, it does not impact the licenses that are currently installed on your ASR 901 1G platform.

 

 

What types of tests have been performed on the recommended Cisco IOS versions?

 

The latest Cisco IOS versions have passed a full test cycle, which includes a regression test, a development test, and a system test.

 

For More Information

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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