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Chapter 3: Troubleshooting
80
Check the FAULT LED. During normal operations, the LED remains off,
except for periods when the management software is saving a change to
its configuration. If it remains on for an extended period, do the following:
Try resetting the switch by disconnecting and reconnecting the AC
power cord. If the switch is a DC model, reset the unit by powering off
and the powering on the DC circuit.
If the FAULT LED remains ON, try downloading a new version of the
switch’s management software through the RS-232 terminal port on
the front panel of the switch. For instructions, refer to the switch’s
software management guide.
If the LED remains on even after you have tried the above
suggestions, the switch may be having a hardware problem. Contact
your Allied Telesis representative for assistance.
Cannot Establish a Local Management Session
If you are unable to establish a local management session with the switch
through the RS-232 terminal port on the front panel, do the following:
Check to be sure that the RS-232 cable is securely connected to the
RS-232 terminal port on the switch and to the RS-232 port on the
terminal or personal computer.
Check to be sure that you are using a straight-through RS-232 cable.
Do not use a cross-over cable.
Check to be sure that the operating parameters on the terminal or the
terminal emulation program, if you are using a personal computer,
have been set correctly. The default settings for “Planning the
Installation” on page 52the RS-232 terminal port can be found in. See
“Planning the Installation” on page 52.