HP ProCurve 1600M Installation Manual page 46

Troubleshooting
Diagnosing with the LEDs
Tip Problem
A module was
installed in the
slot that is a
different type
than the
previously
installed module,
and the switch
has not yet been
reset.
One or more of
the switch
cooling fans may
have failed.
(Switch 1600M
only)
The network
connection is not
working
properly.
The port may be
improperly
configured
3-6
When you "hot swap" modules in the module slot, if you install a different module type
than the one that was previously installed in the slot, you must reset the switch. This
allows the switch processor to properly initialize and configure the new module type. The
blinking LED informs you that this change of module types has occurred. The module will
not work properly until the switch is reset as indicated by all the module's LEDs staying
on until the switch is reset.
You can reset the switch by any of these methods:
• pressing the Reset button on the switch
• power cycling the switch
• selecting the reset or reboot option from the console, web browser interface, or HP
TopTools.
Try disconnecting power from the switch and wait a few moments. Then reconnect the
power to the switch and check the LEDs again. If the error indication reoccurs, one or
more of the fans has failed. The switch has two fans and may continue to operate OK
under this condition if the ambient temperature does not exceed normal room
temperature, but for best operation, the switch should be replaced. Contact your HP-
authorized LAN dealer, or use the electronic support services from HP to get assistance.
See the Customer Support/Warranty card for more information.
Try the following procedures:
• For the indicated port, verify that 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 that you have used the correct cable type for the connection.
- for twisted-pair connections, in general, for connecting an end node to the switch,
use "straight- through" cable; for connecting MDI-X ports on hubs or other switches,
use "crossover" cable.
- for fiber-optic connections, verify that 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 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, or HP TopTools for Hubs & Switches network
management software to determine the state of the port and re-enable the port if
necessary.
• If the other procedures don't resolve the problem, try using a different port or a
different cable.
Use the switch console, through the Status and Counters Menu, to see if the port is part
of a switch mesh (Switch 1600M only) 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. Also
check the Port Status screen from the Status and Counters Menu 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 chapter 8, "Troubleshooting" in the Management
and Configuration Guide that came with your switch.
Solution