Cisco MDS: What does F32_MAC_KLM_CNTR_RX_BAD_WORDS_FROM_DECODER error indicate

Summary: These counters are seen when there are physical layer issues including SFP, cable, or hardware fault on end device.

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Instructions

These errors increment periodically in the following output:
  
----------------------------
Module: 1 show clock
----------------------------
2024-08-30 10:34:21

---------------------------------
Module: 1 counter-stats
---------------------------------


-------------------------------------------------------------------------------------------------------------------------------
 STATISTICS INFORMATION FOR DEVICE ID 154 DEVICE F32 Mac Driver
-------------------------------------------------------------------------------------------------------------------------------
    Port        |                                                                      |                |    Time Stamp   |In
    Range       |                       Error Stat Counter Name                        |    Count       |MM/DD/YY HH:MM:SS|st
                |                                                                      |                |                 |Id
-------------------------------------------------------------------------------------------------------------------------------
fc1/38          |igr : F32_MAC_KLM_CNTR_RX_BAD_WORDS_FROM_DECODER                      |973             |08/29/24 22:43:46|02
fc1/38          |igr : F32_MAC_KLM_CNTR_RX_BAD_WORDS_FROM_DECODER                      |74              |08/23/24 00:41:13|02
fc1/38          |igr : F32_MAC_KLM_CNTR_RX_BAD_WORDS_FROM_DECODER                      |50              |08/20/24 01:44:51|02

Cause:
The term F32_MAC_KLM_CNTR_RX_BAD_WORDS_FROM_DECODER is related to network hardware in the context of Cisco MDS devices. It indicates a counter for the number of bad words received from the decoder on a specific interface. This can be due to issues such as:
 
  • Faulty transceivers: The transceiver module might be malfunctioning. Must check the switch sap and end device sup hardware.
  • Cabling issues: Problems with the physical cables connecting the devices
  • Device issues: Problems with the device on the other end of the connection

Affected Products

Connectrix MDS-Series Hardware

Products

VxBlock and Vblock Systems, Connectrix MDS-Series Firmware 9.X
Article Properties
Article Number: 000228446
Article Type: How To
Last Modified: 02 كانون الثاني 2026
Version:  3
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