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Cisco Bug: CSCvs30360 - ELYSIAN: random and negative values in "sh system internal tah hw counters"

Last Modified

Oct 06, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

9.3(2)IIL9(0.130)

Description (partial)

Symptom:
output of below command may shows huge FCS Counters incrementing with random values and sometimes showing -ve counters. 

SW#sh hardware internal errors module 1
module-1# show system internal tah hw counters

Example:
+++++++
319090688 Fabric Port Class 2 Output Drop Packets                      0 10531259809792
319811584 Fabric Port Class 7 Output Drop Bytes                        0 3156182156556894208
319877120 Fabric Port Class 0 Output Drop Packets                      0 -7671446807729143806
319942656 Fabric Port Class 0 Output Drop Bytes                        0 233702055478174
320008192 Fabric Port Class 1 Output Drop Packets                      0 90250268049932288
320073728 Fabric Port Class 1 Output Drop Bytes                        0 41247525880987648
320139264 Fabric Port Class 2 Output Drop Packets                      0 3507549660061368320
322957312 Fabric Port Class 7 Output Drop Bytes                        0 10619955179421696
323022848 Fabric Port Class 0 Output Drop Packets                      0 771383603899662336
323088384 Fabric Port Class 0 Output Drop Bytes                        0 27563631226912768
323153920 Fabric Port Class 1 Output Drop Packets                      0 2774225320444690432
323219456 Fabric Port Class 1 Output Drop Bytes                        0 27398154726932480
323284992 Fabric Port Class 2 Output Drop Packets                      0 2764577359314026496

Conditions:
Unknown.
Counters are shown incrementing even when switch is in idle state.
Drops do not appear to be related to data or control plane traffic
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