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Troubleshooting flowchart
Figure 11 Troubleshooting error frames (for example, CRC errors) on a port
Solution
To resolve the issue:
1.
Examine the error frame statistics and identify the error frame type:
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 twenty-fivegige 1/0/1
Twenty-FiveGigE1/0/1 transceiver diagnostic information:
Current diagnostic parameters:
Temp.(°C) Voltage(V) Bias(mA) RX power(dBm) TX power(dBm)
43 3.31 6.23 -6.50 -2.15
Alarm thresholds:
Temp(°C) Voltage(V) Bias(mA) RX power(dBM) TX power(dBM)
Replace it with a transceiver
module with correct optical
power
Optical power
of transceiver
module correct?
Determine the type of error
frames accumulating
Yes
Configure matching speed
and duplex
No
No
Yes
Use correct port and link
medium
No
Yes
No
No
No
View the number of flow
control frames received
Yes
Yes
Yes
Contact the support
End
Error frames on the port
Resolved?
Speed and
duplex match the
peer port?
Port and link
medium correct?
Resolved?
Resolved?
No
