22
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.
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.
[H3C] display transceiver diagnosis interface gigabitethernet1/0/1
GigabitEthernet1/0/1 transceiver diagnostic information:
Current diagnostic parameters:
Temp.(°C) Voltage(V) Bias(mA) RX power(dBM) TX power(dBM)
40 3.34 1.13 -20.43 0.20
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 port and the link medium are operating correctly:
a.
Plug the link medium into another port that is operating correctly, and determine whether the
same problem occurs.
b.
If the problem still occurs, verify that the following items are operating correctly:
−
Intermediate links and devices, including optical-to-electrical converters, cable terminal
racks, and transmission devices.
−
Transmission medium, including network cables, optical fibers, and transceiver modules.
c.
Examine the port:
−
If the port is a copper port, directly connect the port to a PC.
−
If the port is a fiber port, replace the transceiver module plugged into the port.
5.
Determine whether the port has received a large amount of flow control frames:
a.
Use the
display interface
command to view the number of pause frames.
If the number of pause frames is accumulating, you can determine that the port has sent or
received a large amount of flow control frames.
b.
Verify that the incoming traffic and outgoing traffic have not exceeded the maximum traffic
processing capability of the local device and the peer device.
6.
If you determine that the configurations, the peer port, and the link are correct but the problem
persists, perform the following tasks:
{
Use the
display diagnostic-information
command to collect the diagnostic information.
{
Contact H3C Support.
<H3C> display diagnostic-information
Save or display diagnostic information (Y=save, N=display)? [Y/N]:Y
