Related Commands - HP FlexFabric 12900 series Troubleshooting Manual

b. If the port is configured with the spanning tree feature, use the display stp brief command to
verify that the port is not in the discarding state.
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 problem.
HP recommends that you 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 send
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 send 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 problem persists, contact HP Support.

Related commands

This section lists the commands that you might use for troubleshooting ports.
Command
display diagnostic-information
display interface
display interface brief
display link-aggregation summary
display logbuffer
display stp brief
display transceiver alarm interface
display transceiver diagnosis
display transceiver interface
Description
Displays or saves running status data for multiple
feature modules.
Displays Ethernet interface information.
Displays brief interface information.
Displays the summary information for all
aggregation groups.
Displays the state of the log buffer and the log
information in the log buffer.
Displays brief spanning tree status and statistics.
Displays the current transceiver module alarms.
Displays the present measured values of the
digital diagnosis parameters for transceiver
modules.
Displays the key parameters of transceiver
modules.
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