HP 5920 series Troubleshooting Manual page 32

a. (Optional.) Use the reset counter interface command in user view to clear the packet statistics
of the port.
This command resets all packet counters to 0, so that you can view the statistics changes more
clearly.
b. Use the display interface command to display the incoming packet statistics and outgoing
packet statistics of the port.
c. Determine the type of error frames that are accumulating.
2. If the port is a fiber port, verify that the optical power of the transceiver module is operating
correctly:
a. Use the display transceiver diagnosis interface command to view the present measured values
of the digital diagnosis parameters for the transceiver module.
[Sysname] display transceiver diagnosis interface ten-gigabitethernet 1/0/1
Ten-GigabitEthernet1/0/1 transceiver diagnostic information:
Current diagnostic parameters:
[module]
[channel] TX Bias(mA)
1
2
3
4
5
6
7
8
Alarm thresholds:
[module]
High
Low
b. If the optical power of the transceiver module is not within the correct range, replace the
transceiver module with a transceiver module of the same model that is operating correctly.
3. Verify that the port configurations are correct:
a. Execute the display interface brief command.
b. Determine whether the speed and duplex mode of the port match the speed and duplex mode
of the peer port.
c. If they do not match, use the speed command and the duplex command to set the speed and
duplex mode for the port.
4. Verify that the link medium connected to the port is operating correctly.
Plug the link medium into a new port that is operating correctly. If the new port cannot receive
packets, replace the link medium.
Temp.(°C)
1stTX 2ndTX 1stRX
N/A N/A N/A
Voltage(V)
3.3VTX 12VTX 3.3VRX
3.29 N/A 3.40
RX power(dBm)
6.09 0.91
5.95 1.09
6.05 1.58
5.85 1.58
6.07 2.23
5.72 2.85
6.11 3.01
5.50 1.17
Temp.(°C) Voltage(V)
0 3.63
0 2.97
28
2ndRX
N/A
12VRX
N/A
TX power(dBm)
-0.77
-0.16
-0.17
-0.14
-0.30
-0.47
-0.08
-0.02
Bias(mA) RX power(dBM)
10.00 1.58
0.50 3.13
TX power(dBM)
5.44
-11.61