Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

The "Detected undersize frames generated by the connected device" is received in Cisco Catalyst Express 500 switches running Cisco IOS

Core issue

The undersize frames notification on the Cisco Catalyst Express 500 switch means that the switch is receiving frames of 61-64 bytes in size on that interface. However, it continues to forward the traffic. This error does not affect the performance of the switch.

The switch turns on the alert light for any notification when Cisco IOS  code 12.2.25.FY.


This issue is resolved in Cisco IOS  version 12.2.25.SEG and later, in which the software only turns on the light for critical errors. This version is available for download on the LAN Switching Software page.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 05:34 PM
Updated by:
Labels (1)