Troubleshooting - 3Com 3C16630A User Manual

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ROUBLESHOOTING
In the main chapters, we have indicated where problems can occur
when using the management facility. This appendix collects together
this troubleshooting information. It will help you to determine the
cause of a problem, should one arise, and to correct the problem. It
lists symptoms that may appear, and suggests what actions to take to
track down and resolve the problem.
The initial Main Banner screen will not display.
Check that your terminal or terminal emulator is correctly configured to
operate as a VT100 terminal.
For serial port access, check you have performed the wake-up
procedure correctly, by pressing [Return][Return].
Check the settings on your terminal or emulator. The parity must set to
'none', the stop bit'1' and the character size '8'. The management
facility's autoconfiguration works only with speeds from 1200 to 9600
baud.
Possibly, autoconfiguration is disabled.
If you still cannot access the device, perform a reset by pressing the
Reset switch at the rear of the Module once. Now check the MGMT LED
on the front of the management unit (unit 1). The LED should be
green. If it is red, and remains red after you perform a reset a number
of times, contact your supplier.
If the MGMT LED is off, there is no Module installed, or the unit cannot
correctly identify the installed module. Check that the connector cables
are secure, and that you have installed the module correctly as
described in Chapter 2.