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Cisco Bug: CSCul64048 - N7K CFP: RX-Power on Network Lane doesn't show correct value

Last Modified

Jan 13, 2016

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 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.2(2)

Description (partial)

Symptom:
Nexus doesn't show correct RX-Power value on CFP Network-Lane.

(1)
Lane Number:2 Network Lane
            SFP Detail Diagnostics Information (internal calibration)
   ----------------------------------------------------------------------------
                 Current              Alarms                  Warnings
                 Measurement     High        Low         High          Low
   ----------------------------------------------------------------------------
   Tx Power      20.16 dBm      27.49 dBm   11.69 dBm   24.50 dBm     15.69 dBm
   Rx Power      21.04 dBm      27.49 dBm    5.40 dBm   24.50 dBm      9.40 dBm <--- ###
   Transmit Fault Count = 0
   ----------------------------------------------------------------------------

(2) unplug cable

(3)
Lane Number:2 Network Lane
            SFP Detail Diagnostics Information (internal calibration)
   ----------------------------------------------------------------------------
                 Current              Alarms                  Warnings
                 Measurement     High        Low         High          Low
   ----------------------------------------------------------------------------
   Tx Power      20.16 dBm      27.49 dBm   11.69 dBm   24.50 dBm     15.69 dBm
   Rx Power      21.04 dBm      27.49 dBm    5.40 dBm   24.50 dBm      9.40 dBm <--- ###
   Transmit Fault Count = 0
   ----------------------------------------------------------------------------

Conditions:
Using CFP.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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