Diagnosing transceiver modules

The switch provides the alarm function and digital diagnosis function for transceiver modules. When a transceiver module fails or is not operating normally, you can check the alarms present on the transceiver module to identify the fault source or examine the key parameters monitored by the digital diagnosis function, including the temperature, voltage, laser bias current, TX power, and RX power.

To diagnose transceiver modules, execute the following command in any view:

Task

Command

Remarks

Display alarms present on the transceiver in a specified interface

display transceiver alarm interface [ interface-type interface-number ]

Available for all transceivers

If no error occurs, None is displayed.

Display the present measured values of the digital diagnosis parameters for the transceiver in a specified interface

display transceiver diagnosis interface [ interface-type interface-number ]

Available for all transceivers.

# Display the alarm information about the transceiver plugged in GigabitEthernet 3/0/1.

<Sysname> display transceiver alarm interface GigabitEthernet 3/0/1
GigabitEthernet3/0/1 transceiver current alarm information:
  RX loss of signal
  RX power low 

Table 22 shows the alarm information that may occur to the commonly used transceivers.

Table 22: Command output

Field

Remarks

transceiver current alarm information

Alarms present on the transceiver module.

SFP/SFP+:

RX loss of signal

Received signals are lost.

TX fault

Transmission error.

RX power high

The received optical power is high.

RX power low

The received optical power is low.

TX power high

The transmitted optical power is high.

TX power low

The transmitted optical power is low.

TX bias high

The transmitted bias current is high.

TX bias low

The transmitted bias current is low.

Temp high

The temperature is high.

Temp low

The temperature is low.

Voltage high

The voltage is high.

Voltage low

The voltage is low.

Transceiver info I/O error

Transceiver information read and write error

Transceiver info checksum error

Transceiver information checksum error

Transceiver type and port configuration mismatch

The type of the transceiver module does not match the port configuration.

Transceiver type not supported by port hardware

The port does not support this type of transceiver modules.

XFP

RX loss of signal

Received signals are lost.

RX not ready

The receiving status is not ready

RX CDR loss of lock

Receiving CDR loss of lock.

TX fault

Transmission error.

TX not ready

The transmission status is ready.

TX CDR loss of lock

Transmission CDR loss of lock.

Module not ready

The module is not ready.

APD supply fault

Avalanche Photo Diode (APD) supply error.

TEC fault

Thermoelectric Cooler (TEC) error.

Wavelength unlocked

Wavelength loss of lock.

RX power high

The received optical power is high.

RX power low

The received optical power is low.

TX power high

The transmitted optical power is high.

TX power low

The transmitted optical power is low.

TX bias high

The transmitted bias current is high.

TX bias low

The transmitted bias current is low.

Temp high

The temperature is high.

Temp low

The temperature is low.

Voltage high

The voltage is high.

Voltage low

The voltage is low.

Transceiver info I/O error

Transceiver information read and write error

Transceiver info checksum error

Transceiver information checksum error

Transceiver type and port configuration mismatch

The type of the transceiver module does not match the port configuration.

Transceiver type not supported by port hardware

The port does not support this type of transceiver modules.

# Display the currently measured values of the fault detection parameters of the transceiver plugged in interface GigabitEthernet 3/0/2.

<Sysname> display transceiver diagnosis interface gigabitethernet 3/0/2
GigabitEthernet3/0/2 transceiver diagnostic information:
  Current diagnostic parameters:
    Temp(°C)  Voltage(V)  Bias(mA)  RX power(dBm)  TX power(dBm)
    36        3.31        6.13      -35.64          -5.19

Table 23: Command output

Field

Description

transceiver diagnostic information

Digital diagnosis information of the transceiver module on the interface.

Temp.(°C)

Digital diagnosis parameter—Temperature, in °C, accurate to 1°C.

Voltage(V)

Digital diagnosis parameter—Voltage, in V, accurate to 0.01 V.

Bias(mA)

Digital diagnosis parameter—Bias current, in mA, accurate to 0.01 mA.

RX power(dBm)

Digital diagnosis parameter—RX power, in dBm, accurate to 0.01 dBm.

TX power(dBm)

Digital diagnosis parameter—TX power, in dBm, accurate to 0.01 dBm.