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Cisco Bug: CSCuj80663 - DOM values incorrect on SR/LR SFPs Nexus 7000 6.2

Last Modified

Jun 30, 2020

Products (7)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

6.2(2)

Description (partial)

Symptom:
The command "show interface <interface number>" transceiver detail" may show incorrect values for DOM on the Nexus 7000 platform running version 6.2(2). The values will differ from versions in release trains 5.2 and 6.1

The below is an example of these incorrect values:

Nexus-7000# sh interface e2/8 transceiver details | no-more
Ethernet2/8
    transceiver is present
    type is 10GBASE-SR
    name is CISCO-AVAGO
    part number is <omitted>
    revision is R6
    serial number is <omitted>
    tranceiver type is X2 Medium
    bit Encoding is NRZ
    connector Type is SC
    protocol Type is 10GbE
    10GbE Code Byte 0 : 10GBASE-SR
    fiber Type Byte 0 : MM-Generic
    fiber Type Byte 1 : Unspecified
    transmission Range is 300 (in m)
    cisco part number is 10-2205-06
    cisco product id is X2-10GB-SR
    cisco vendor id is V06

    number of lanes 1

           SFP Detail Diagnostics Information (internal calibration)
  ----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
  ----------------------------------------------------------------------------
  Temperature   28.82 C        74.00 C     -4.00 C     70.00 C        0.00 C
  Voltage           N/A         0.00 V      0.00 V      0.00 V        0.00 V
  Current        1.25 mA        2.40 mA     0.10 mA     2.00 mA       0.20 mA
  Tx Power      17.51 dBm      22.99 dBm    8.69 dBm   18.99 dBm     12.69 dBm
  Rx Power      10.12 dBm      22.99 dBm    6.09 dBm   18.99 dBm     10.09 dBm
  Transmit Fault Count = 0
  ----------------------------------------------------------------------------
  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

=========

The above values are not accurate for Tx and Rx Power.

The operation of the SFPs and connecting links work as normal, only the reported values from this CLI output is impacted.

Conditions:
- This is occurring for both SR/LR SFPs.
- This impacts NX-OS release 6.2(2).

Related Community Discussions

[Nexus7000シリーズ] DOM の光レベルの表示異常
2017年7月18日(初版) TAC SR Collection 主な問題 Nexus7000の6.2(2)を使用し show interface transceiver detail にて光レベルを確認した場合以下のように表示が異常となります。 &lt;異常&gt; | SFP Detail Diagnostics Information (internal calibration) ---------------------------------------------------------------------------- Current Alarms Warnings Measurement High Low High Low ---------------------------------------------------------------------------- Temperature ...
Latest activity: Jul 18, 2017
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