Field Notice: FN - 70611 - Some ASR1001-X, ASR1001-HX, and ASR1002-HX Routers with Cisco IOS XE Release 17.x Combined with Older ROMMON Versions Might Crash Due to the Enablement of Automatic Power Management - Software Upgrade Recommended

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Updated:January 13, 2021
Document ID:FN70611

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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
06-Jan-21
Initial Release

Products Affected

Affected Product ID Comments
ASR1001X-10G-K9
ASR1001X-5G-K9
ASR1001X-2.5G-K9
ASR1001-X=
Part Alternate
ASR1001-X
ASR1001X-20G-SEC
ASR1001X-10G-VPN
ASR1001X-5G-SEC
ASR1001X-5G-VPN
ASR1001X-2.5G-VPN
ASR1001X-10G-SEC
ASR1001X-2.5G-SEC
ASR1001X-20G-VPN
ASR1001X-AIS-AX
ASR1001X-AES-AX
C1-ASR1001-X/K9
ASR1001-X-DNA
ASR1001-HX=
Part Alternate
ASR1001-HX
C1-ASR1001-HX/K9
ASR1001-HX-4GE
ASR1001-HX-DNA
ASR1002-HX=
Part Alternate
ASR1002-HX
C1-ASR1002-HX/K9
C1-ASR1002-HX/K9=
ASR1002-HX-DNA
ASR1002HX-6GE-2TE

Defect Information

Defect ID Headline
CSCvu57682 ASR1001-X 16GB: Kernel crashes repeatedly after upgrading from 16.12.2 to 17.2.1
CSCvv19063 ASR1K, C9800 Commit config clean up for cstate and pstate to 17.4, 17.3.2, 17.2.2: backout idle=poll

Problem Description

Some ASR1001-X, ASR1001-HX, and ASR1002-HX routers with Cisco IOS® XE Release 17.x combined with earlier ROM Monitor (ROMMON) versions (16.x and earlier) might crash due to the enablement of automatic power management mode shifting on the router’s host CPU.

The issue is only seen with a specific combination of ROMMON and Cisco IOS XE versions.

Background

Certain Cisco IOS XE 17.x releases combined with earlier ROMMON versions (16.x and earlier) enable automatic power management mode shifting. The automatic power management mode shifting might induce Multiple Bit ECC (MBE) memory errors, which results in Cisco IOS XE crashes.

  • This issue is only seen on earlier Cisco IOS XE 17.x releases and earlier ROMMON versions (16.x and earlier).
  • This issue is not seen on Cisco IOS XE releases 16.x and earlier, regardless of ROMMON version.
  • This issue is not seen on any Cisco IOS XE release if ROMMON Version 17.3(1r) and later is installed.

Cisco IOS XE Release 17.x disables automatic power management mode.

ROMMON Version 17.3(1r) disables automatic power management mode.

Problem Symptom

Affected routers might see Cisco IOS XE crashes. There will be a message which indicates the Cisco IOS XE kernel will record logs in the “bootflash/core” directory:

---------------------

Starting IOS-XE kernel dump from previous failure.

System will automatically reboot

---------------------


MemAvailable:      26744 kB


Initializing Hardware ...

-------------------------

Affected routers will go into reboot loop generating core files each time in 
bootflash:core as below

-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

device#dir bootflash:core

Directory of bootflash:/core/

753666 -rw- 1 Jun 5 2020 15:11:06 +02:00 .callhome

196612 -rw- 945 Jun 4 2020 11:41:52 +02:00 kernel.rp_1NG_0_inv_log_20200604094108.txt

xxxxxx -rw- xxx Jun 4 2020 13:17:49 +02:00 kernel.rp_1NG_0.core.TEMP_IN_PROGRESS.txt

Workaround/Solution

A software upgrade is recommended. This issue is only seen on earlier Cisco IOS XE 17.x releases with earlier ROMMON versions (16.x and earlier).

The issue can be resolved by either a ROMMON upgrade OR a Cisco IOS XE upgrade.

  • In order to resolve your issue with a Cisco IOS XE upgrade, upgrade the system to Cisco IOS XE Release 17.3.2 or 17.4.1 or later.
  • In order to resolve your issue with a ROMMON upgrade, upgrade the system to ROMMON Version 17.3(1r) or later.

Notes:

  • Once a customer loads ROMMON Version 17.3(1r) on the device, the customer cannot downgrade to an earlier version of ROMMON.
  • A customer with ROMMON Version 17.3(1r) is fully backwards compatible with any supported Cisco IOS XE release for the hardware.

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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