Field Notice: FN - 72242 - Limited Number of Cisco Catalyst IR1100 Rugged Series Routers Might Fail to Boot When Upgrading to Cisco IOS XE 17.5.1 - Software Upgrade Recommended

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	07-Sep-21	Initial Release

Products Affected

Affected Product ID	Comments
IR1101-K9	Only when upgrading to Cisco IOS XE 17.5.1
IR1101-A-K9	Only when upgrading to Cisco IOS XE 17.5.1

Defect Information

Defect ID	Headline
CSCvz36477	IR1101: some devices fail to boot with no error messages

Problem Description

Cisco Catalyst IR1100 Rugged Series Routers with pluggable modems inserted might fail to boot the image during the upgrade to Cisco IOS^® XE Release 17.5.1.

Background

Cisco Catalyst IR1100 Rugged Series Routers with pluggable modems inserted might fail to boot the image during the upgrade to Cisco IOS XE Release 17.5.1. This issue often occurs without any additional messages displayed on the console.

Note: One of these messages might be displayed:

• Occasionally, the message “Watchdog timeout” might be displayed, or
• The message "EFI stub: Exiting boot services and installing virtual address map..." might be displayed and after a few minutes the system returns to ROM Monitor (ROMMON).

Problem Symptom

This issue occurs when a Cisco Catalyst IR1100 Rugged Series Router with pluggable modems inserted is upgraded to Cisco IOS XE Release 17.5.1

Two symptoms for this issue are:

• When an IR1101 router boots Cisco IOS XE Release 17.5.1, it will display these messages to the console, stall for a couple of minutes, and return to ROMMON.

  Image validated
  WATCHDOG: Armed to 171798 milliseconds
  MCU Watchdog is enabled
  EFI stub: Booting Linux Kernel...
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services and installing virtual address map...

• When an IR1101 router boots Cisco IOS XE Release 17.5.1, it will dump a kernel panic call trace to the console and return to ROMMON.

  Kernel panic - not syncing: SBSA Generic Watchdog timeout
  CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O    4.14.200-17.0.2 #1
  Hardware name: Cisco sparrow (DT)
  Call trace:
   dump_backtrace+0x0/0x168
   show_stack+0x24/0x30
   dump_stack+0xb8/0x100
   panic+0x12c/0x2a0
   sbsa_gwdt_interrupt+0x18/0x20 [sbsa_gwdt]
  ...

Workaround/Solution

Solution

The customer must upgrade to Cisco IOS XE Release 17.6.1a.

Workaround

The customer can remove the pluggable modem and power-cycle (that is, disconnect the power cord and reconnect) the device to bring up the Cisco IOS XE Release 17.5.1 image. It is possible that reinserting the pluggable modem might result in the device again failing to boot.

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:

• Open a service request on Cisco.com
• By email or telephone

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