34
If the port is set to the discarding state by the spanning tree feature, examine and modify the
spanning tree feature configurations to resolve the issue.
As a best practice, configure the port as an edge port or disable the spanning tree feature on
the port if it is directly connected to a terminal.
c.
If the port is in an aggregation group, use the
display link-aggregation summary
command to verify that the status of the port is
Selected
.
If the status of the port is
Unselected
, the port cannot send or receive data packets.
Determine the reasons why the port becomes
Unselected
, for example, the attribute
configurations of the port are different from the reference port. Modify the attribute
configurations of the port to make the port become
Selected
.
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.
5.
Verify that the port is operating correctly:
If the port is a copper port, connect the port directly to a PC.
If the port is a fiber port, replace the transceiver module in the port.
If the port can receive packets, troubleshoot the remaining possible points of failure on the
transmission path. The troubleshooting process is beyond the scope of this document.
6.
If the issue persists, contact H3C Support.
Failure to send packets
Symptom
A port is up, but it cannot send packets.
Troubleshooting flowchart
Figure 13 Troubleshooting failure to send packets
A port failed to send packets
Modify port
configuration
End
Port configuration
affects packet receiving?
Problem resolved?
Contact the support
Port and link
medium correct?
Use the correct port
and link medium
Problem resolved?
N
Y
Display packet statistics for
the port
N
N
Y
Y
Y
N
