HP 6400CL - Manual (Page 53)

4-5
Troubleshooting
Diagnosing with the LEDs
T
rou
blesh
oot
ing
➏ The network
connection is not
working
properly. Try the following procedures:
• For the indicated port, verify both ends of the cabling, at the switch and the connected
device, are connected properly.
• Verify the connected device and switch are both powered on and operating correctly.
• Verify you have used the correct cable type for the connection:
– For fiber-optic connections, verify the transmit port on the switch is connected to
the receive port on the connected device, and the switch receive port is connected
to the transmit port on the connected device.
• Verify 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, or ProCurve Manager network management
software to determine the state of the port and re-enable the port if necessary.
• Verify 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 a very 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.
➐ The port may be
improperly
configured, or
the port may be in
a “blocking”
state by the
normal operation
of the Spanning
Tree, LACP, or
IGMP features. Use the switch console to see if the port is part of a dynamic trunk (through the LACP
feature) or to see if Spanning Tree is enabled on the switch, and to see if the port may
have been put into a “blocking” state by those features. The show lacp command displays
the port status for the LACP feature; the show spanning-tree command displays the port
status for Spanning Tree.
Also check the Port Status screen using the show interfaces command to see if the port
has been configured as “disabled”.
Other switch features that may affect the port operation include VLANs and IGMP. Use
the switch console to see how the port is configured for these features.
For software troubleshooting tips, see the chapter “Troubleshooting” in the Management
and Configuration Guide, which is on the Documentation CD-ROM that came with your
switch.
Make sure also, the device at the other end of the connection is indicating a good link to
the switch. If it is not, the problem may be with the cabling between the devices or the
connectors on the cable.
➑ An RPS is
connected but
the switch has
experienced an
internal power
supply fault. Refer to the ProCurve 600/610 External Power Supplies documentation. You may have to
replace the switch.
➒ Expansion cl
module is
plugged in but
has experienced
a fault. Check the rear of the switch. Check the module LEDs for indications. This condition will
only occur during an initialization self test.
Tip Problem Solution