Field Notice: FN - 70567 - C9200/C9200L Devices That Run on Certain 16.12.x and 17.1.1/17.2.1 Cisco IOS XE Releases Will Exhibit MAC Address Update Failure - Software Upgrade Recommended

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Updated:September 29, 2020
Document ID:FN70567

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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
27-May-20
Initial Release
2.0
24-Jun-20
Initial External Release
2.1
29-Sep-20
Updated the Products Affected and Workaround/Solution Sections

Products Affected

Affected OS Type Affected Software Product Affected Release Affected Release Number Comments
NON-IOS
IOSXE
16
16.12.1, 16.12.1s, 16.12.2, 16.12.2t, 16.12.3
NON-IOS
IOSXE
17
17.1.1, 17.1.1s, 17.2.1

Defect Information

Defect ID Headline
CSCvt22238 C9200L/C9200 : Interface counter/MAC learning/MAC ageing does not work/ 32 prefix stuck

Problem Description

C9200L/C9200 devices that run on Cisco IOS® XE software releases as mentioned in the Products Affected section will exhibit failure around the MAC address update and port interface counter update.

Background

The issue is caused by an internal software timer that is impacted after a system uptime of seven weeks.

Problem Symptom

The affected product will show these symptoms after seven weeks of uptime/operation:

  • No new MAC address learning
  • No removal of MAC addresses after an aging timeout
  • Port interface counters do not increment
  • Packet drops to specific hosts in subnet

Workaround/Solution

Workaround: Reload the switch in order to temporarily recover from this problem. However, this failure will reappear after seven weeks of operation. The switch can be reloaded proactively in order to avoid this issue occurrence before the uptime reaches seven weeks.

Solution: Cisco recommends that you upgrade to the release listed in the table or install the Reload Software Maintenance Upgrade (SMU) on the current software release which has the fix for this issue.

Current Running Software Release Fix Available for the Software Release Comment
16.12.1, 16.12.2, or 16.12.3 Option 1. Upgrade to Software Release 16.12.3a or later. Customers are encouraged to look for the recommended release (marked as *) on cisco.com or see the release recommendation page for the Catalyst Switching products.
Option 2. Install the SMU for the current software release. The SMU is available on cisco.com for the respective release.

The switch will be reloaded after the SMU is installed (C9200/C9200L supports only Reload SMU).

See the System Management Configuration Guide, Software Maintenance Upgrade chapter for more details.
17.1.1 or 17.2.1 Option 1. Downgrade to Software Release 16.12.3a or later in the 16.12 release train. Customers are encouraged to look for the recommended release (marked as *) on cisco.com or see the release recommendation page for the Catalyst Switching products.
Option 2. Upgrade to Software Release 17.3.1 or later.  
Option 3. The engineering special image with the fix for Cisco IOS XE Software Release 17.1 or 17.2 is available on request. Contact Cisco TAC for assistance. Engineering Special builds are meant to be deployed for a limited time frame only and customers are advised to move to the release with the fix as soon as it is available on cisco.com.
16.12.1s or 16.12.2t Upgrade to Software Release 16.12.3s.  
17.1.1s Upgrade to Software Release 17.3.1 or later.  

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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