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Cisco Bug: CSCvv93541 - F32_MAC_KLM_CNTR_RX_FEC_UNCORRECTED_BLOCKS not being recorded in OBFL error-stats counter-stats

Last Modified

Oct 13, 2020

Products (1)

  • Cisco MDS 9000 NX-OS and SAN-OS Software

Known Affected Releases

8.1(1)

Description (partial)

Symptom:
2 similar problems:

1 - 9700 Module 10 is an 32G FC module DS-X9648-1536K9 and it is NOT recording F32_MAC_KLM_CNTR_RX_FEC_UNCORRECTED_BLOCKS errors under OBFL counter-stats or error-stats :

show 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
------ ----                                          -----            -----
...                                  
3861   igr : F32_MAC_KLM_CNTR_RX_FEC_UNCORRECTED_BLO 0000000000033059 43 -      <<<<
       CKS                                          
</pre>

show logging counter-stats
<pre>
---------------------------------
 Module: 10 counter-stats
---------------------------------
...
</pre>

show logging error-stats
<pre>
---------------------------------
 Module: 7 error-stats
---------------------------------
...
</pre>


2 - Module 7 is a 16G FC module DS-X9448-768K9 and it is recording FCP_PCS_CNT_STATS_ERRORS_RX_FEC_UNCORRECTED_BLOCKS in OBFL counter-stats but not in error-stats.

show hardware internal errors:

<pre>
|------------------------------------------------------------------------|
| Device:F16 Mac Driver           Role:FCMAC                   Mod: 7    |
| Last cleared @ Mon Feb 24 16:43:47 2020
| Device Statistics Category :: ERROR
|------------------------------------------------------------------------|
....
Instance:5
Cntr   Name                                          Value            Ports
------ ----                                          -----            -----
...   
1563   FCP_PCS_CNT_STATS_ERRORS_RX_FEC_UNCORRECTED_B 0000000000000007 43 -      
       LOCKS     
</pre>

show logging counter-stats

<pre>
---------------------------------
 Module: 7 counter-stats
---------------------------------
...
fc7/43          |FCP_PCS_CNT_STATS_ERRORS_RX_FEC_UNCORRECTED_BLOCKS                    |7               |05/06/20 15:39:33|05
</pre>

show logging error-stats
<pre>
---------------------------------
 Module: 10 error-stats
---------------------------------
...
</pre>

Since FEC UNCORRECTED are presumably real drops they should be in OBFL error-stats as well as counter-stats.

Conditions:
All using the following 9700 modules and fabric switches utilizing FEC:

2/4/8/10/16 Gbps Advanced FC Module DS-X9448-768K9
4/8/16/32 Gbps Advanced FC Module   DS-X9648-1536K9 
1/10/40G IPS,2/4/8/10/16G FC Module DS-X9334-K9

MDS 9696S
MDS 9132T
MDS 9148T
MDS 9396T
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