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Cisco Bug: CSCvv93277 - Interface CRCs not incrementing on MDS 32G modules/switches

Last Modified

Oct 09, 2020

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

8.1(1) 8.4(1a)

Description (partial)

Symptom:
Input CRC errors are being recorded on a MDS 32G module interface but they are not showing up under the show interface command:

<pre>
show interface:

fc10/43 is up
    Port description is CDCFX18CH1ECOMC12_PCIe7-P2
...
        232 discards,464 errors
        0 invalid CRC/FCS,0 unknown class 
        0 too long,232 too short
      8330783440 frames output,16554870756304 bytes
        0 discards,0 errors
</pre>

Hardware internal errors:

<pre>

|------------------------------------------------------------------------|
| Device:F32 Mac Driver           Role:FCMAC                   Mod:10    |
| Last cleared @ Mon Sep 21 15:30:27 2020
| Device Statistics Category :: ERROR
|------------------------------------------------------------------------|

Instance:2
Cntr   Name                                          Value            Ports
------ ----                                          -----            -----
2487   igr : F32_DEC_CRC_ERR_CNT                     0000000000000232 43 -      
2545   igr : IP_FCMAC_ERRORS_RX_MIN_FRAME_PAD        0000000000000232 43 -      
2736   igr : F32_RHP_MAC_ERR_PKT_CNT                 0000000000000232 43 -      
2743   igr : F32_RHP_NP_EOFA                         0000000000000232 43 -      
2744   igr : F32_RHP_EOF_ABORT                       0000000000000232 43 -      
2781   igr : F32_RHP_RPB_CRC_ERR_PKT_CNT             0000000000000232 43 -      
</pre>

Conditions:
Occurs on MDS 32G modules and switches only:

MDS 9700s - 4/8/16/32 Gbps Advanced FC Module   DS-X9648-1536K9
MDS 9132T
MDS 9148T
MDS 9396T

Note:  Operational speed of interface is not important.
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