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Cisco Bug: CSCvu32603 - AVAGO QSFP-100G-SR4 transceiver displays abnormal Rx dbm value in down port

Last Modified

Oct 03, 2020

Products (25)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 93240YC-FX2 Switch
  • Cisco Nexus 93120TX Switch
  • Cisco Nexus 9332C Switch
  • Cisco Nexus 9372TX-E Switch
  • Cisco Nexus 93108TC-EX Switch
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Known Affected Releases

14.2(2e)

Description (partial)

Symptom:
The AVAGO QSFP-100G-SR4 transceiver displays an abnormal Rx dbm value in a down port.

Avago qsfp: in 1/49          ---------looks abnormal
Ethernet1/49
    transceiver is present
    type is QSFP-100G-SR4
    name is CISCO-AVAGO    
    part number is SFBR-89CDDZ-CS5
    revision is 06Bh
    serial number is AVFxxxxxxxx   
    nominal bitrate is 25500 MBit/sec per channel
    Link length supported for cable assembly is 50 m
    Link length supported for 50/125um OM3 fiber is 70 m
    cisco id is -- 17
    cisco extended id number is 220
    cisco part number is 10-3142-03
    cisco product id is QSFP-100G-SR4-S    
    cisco vendor id is V03
 
DOM is Enabled
 
Lane Number : 1 Network Lane
         SFP Detail Diagnostics Information (external calibration)
----------------------------------------------------------------------------
                                   Alarms                  Warnings
                              High        Low         High          Low
----------------------------------------------------------------------------
Temperature   32.21 C        75.00 C     -4.99 C     70.00 C       0.000 C
Voltage       3.302 V        3.630 V     2.970 V     3.465 V       3.135 V
Current       7.494 mA       10.00 mA    2.000 mA    8.500 mA      3.000 mA
Tx Power      -0.28 dBm      5.400 dBm   -12.4 dBm   2.399 dBm     -8.40 dBm
Rx Power      0.000 dBm      5.400 dBm   -14.2 dBm   2.399 dBm     -10.3 dBm
Transmit Fault Count = 0    
----------------------------------------------------------------------------
 
Lane Number : 2 Network Lane
         SFP Detail Diagnostics Information (external calibration)
----------------------------------------------------------------------------
                                   Alarms                  Warnings
                              High        Low         High          Low
----------------------------------------------------------------------------
Temperature   32.21 C        75.00 C     -4.99 C     70.00 C       0.000 C
Voltage       3.302 V        3.630 V     2.970 V     3.465 V       3.135 V
Current       7.494 mA       10.00 mA    2.000 mA    8.500 mA      3.000 mA
Tx Power      -0.12 dBm      5.400 dBm   -12.4 dBm   2.399 dBm     -8.40 dBm
Rx Power      0.000 dBm      5.400 dBm   -14.2 dBm   2.399 dBm     -10.3 dBm
Transmit Fault Count = 0    
----------------------------------------------------------------------------
 
Lane Number : 3 Network Lane
         SFP Detail Diagnostics Information (external calibration)
----------------------------------------------------------------------------
                                   Alarms                  Warnings
                              High        Low         High          Low
----------------------------------------------------------------------------
Temperature   32.21 C        75.00 C     -4.99 C     70.00 C       0.000 C
Voltage       3.302 V        3.630 V     2.970 V     3.465 V       3.135 V
Current       7.494 mA       10.00 mA    2.000 mA    8.500 mA      3.000 mA
Tx Power      -0.33 dBm      5.400 dBm   -12.4 dBm   2.399 dBm     -8.40 dBm
Rx Power      -29.5 dBm      5.400 dBm   -14.2 dBm   2.399 dBm     -10.3 dBm
Transmit Fault Count = 0    
----------------------------------------------------------------------------
 
Lane Number : 4 Network Lane
         SFP Detail Diagnostics Information (external calibration)
----------------------------------------------------------------------------
                                   Alarms                  Warnings
                              High        Low         High          Low
----------------------------------------------------------------------------
Temperature   32.21 C        75.00 C     -4.99 C     70.00 C       0.000 C
Voltage       3.302 V        3.630 V     2.970 V     3.465 V       3.135 V
Current       7.494 mA       10.00 mA    2.000 mA    8.500 mA      3.000 mA
Tx Power      -0.21 dBm      5.400 dBm   -12.4 dBm   2.399 dBm     -8.40 dBm
Rx Power      -27.6 dBm      5.400 dBm   -14.2 dBm   2.399 dBm     -10.3 dBm
Transmit Fault Count = 0    
----------------------------------------------------------------------------

Conditions:
This issue occurs with the AVAGO QSFP-100G-SR4 transceiver.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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