Tip Problem Solution
The cable verification process must include all
patch cables from any end devices, including the
switch, to any patch panels in the cabling path.
• Verify that the port has not been disabled
through a switch configuration change.
You can use the console interface, or, if you
have configured an IP address on the switch,
use the web browser interface, IMC, or AirWave
network management software to determine the
state of the port and re-enable the port if
necessary.
• Verify that the switch port configuration matches
the configuration of the attached device. For
example, if the switch port is configured as
“Auto”, the port on the attached device also
MUST be configured as “Auto”. Depending on
the port type, twisted-pair or fiber-optic, if the
configurations do not match, the results could be
an unreliable connection, or no link at all.
• If the other procedures do not resolve the
problem, try using a different port or a different
cable.
7 The port or remote link partner may be improperly
configured, or the port may be in a “blocking” state
by the normal operation of protocols, such as
Spanning Tree, LACP, or GVRP features.
• Ensure that the device at the other end of the
connection indicates a good link to the switch. If
it does not, the problem may be with the cabling
between the devices, the connectors on the
cable, or the configuration of the device on the
remote end of the cable.
• Use the switch console to check the
configuration on the port to confirm whether the
port is administratively disabled or placed in a
“blocking” state by the normal operation of one
or more protocols.
◦ Check the Port Status using the show
interfaces command to confirm whether the
port is configured as “disabled”.
◦ To confirm which protocols are operating on
the port, review the switch configuration. Use
the appropriate feature show commands to
confirm whether the port is put into a
“blocking” state.
• For software troubleshooting tips, see the
chapter “Troubleshooting” in the Management
and Configuration Guide for your switch at
https://www.hpe.com/networking/support.
Table Continued
Chapter 6 Troubleshooting 73
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