Symptom

SFP CWDM-SFP-1530 trancevier connected in a ISR4000 is showing a discrepacy in the RX optical power values between show int gigabitEthernet transceiver detail and show hw-module subslot transceiver status outputs. #show int gigabitEthernet 0/0/0 transceiver detail Optical High Alarm High Warn Low Warn Low Alarm Receive Power Threshold Threshold Threshold Threshold Port Lane (dBm) (dBm) (dBm) (dBm) (dBm) --------- ---- --------------- ---------- --------- --------- --------- Gi0/0/0 N/A -27.7 -40.0 -7.0 -28.2 -32.2 <<<<<<<<<<<<<<<<<<<< show hw-module subslot 0/0 transceiver 0 status The Transceiver in slot 0 subslot 0 port 0 is enabled. Module temperature = +42.648 C Transceiver Tx supply voltage = 3293.0 mVolts Transceiver Tx bias current = 34312 uAmps Transceiver Tx power = 3.2 dBm Transceiver Rx optical power = -10.4 dBm <<<<<<<<<<<<<<<<<<< Checking same outputs in other thansceiver and both values are similars. #show int gigabitEthernet 0/0/0 transceiver detail for example using a (GLC-LH-SMD) Optical High Alarm High Warn Low Warn Low Alarm Receive Power Threshold Threshold Threshold Threshold Port Lane (dBm) (dBm) (dBm) (dBm) (dBm) --------- ---- --------------- ---------- --------- --------- --------- Gi0/0/0 N/A -2.0 0.0 -3.0 -19.0 -23.0 <<<<<<<<<<<<<<<<<<<<<<< #show hw-module subslot 0/0 transceiver 0 status The Transceiver in slot 0 subslot 0 port 0 is enabled. Module temperature = +33.921 C Transceiver Tx supply voltage = 3298.7 mVolts Transceiver Tx bias current = 15712 uAmps Transceiver Tx power = -7.6 dBm Transceiver Rx optical power = -2.1 dBm <<<<<<<<<<<<<<<<<<<<<<<< The issue seems to be a cosmetic issues in the show int gigabitEthernet 0/0/0 transceiver detail output since link is up and working as expected.

Conditions

Using a SFP CWDM-SFP-1530 tranceviers

Workaround

Under investigation

Further Problem Description