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Cisco Bug: CSCvt70269 - Cloudscale FX2-FX3: Peak counter are not getting displayed

Last Modified

Jun 17, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

9.3(4)IIL9(0.626)

Description (partial)

Symptom:
After exceeding 90% of threshold, port level buffer counters under "show hardware internal buffer info pkt-stats peak" will be cleared automatically within 2 minutes.

Conditions:
*Cloudscale ASIC.
*Log message confirming buffer exceeded:
2020 Apr  4 18:31:52 SW01 %TAHUSD-SLOT5-4-BUFFER_THRESHOLD_EXCEEDED: Module 5 Instance 0 Pool-group buffer 90 percent threshold is exceeded!
2020 Apr  5 01:23:18 SW01 %TAHUSD-SLOT5-4-BUFFER_THRESHOLD_EXCEEDED: Module 5 Instance 0 Pool-group buffer 90 percent threshold is exceeded!
2020 Apr  5 01:24:27 SW01 %TAHUSD-SLOT5-4-BUFFER_THRESHOLD_EXCEEDED: Module 5 Instance 0 Pool-group buffer 90 percent threshold is exceeded!


The output of "show hardware internal buffer info pkt-stats peak" will not have any counters under the ASIC port that experience congestion:
<snip>

|--------------+---------------+---------------+---------------+---------------+---------------+--------------+---------------+---------------+|
|                                                  Queue Peak counters                                                                         |
|--------------+---------------+---------------+---------------+---------------+---------------+--------------+---------------+---------------+|
|ASIC Port               Q7              Q6              Q5              Q4              Q3              Q2              Q1              Q0    |
|--------------+---------------+---------------+---------------+---------------+---------------+--------------+---------------+---------------+|
 [0]
          UC->             0               0               0               0               0               0               0               0   |
          MC->             0               0               0               0               0               0               0               0   | 

*The ASIC port counter is cleared within 2 minutes of the syslog message.
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