3Com 3CBLSG48 - Troubleshooting Solutions

APPENDIX D: TROUBLESHOOTING
197
Table 12 Troubleshooting Solutions
Problems Possible Cause Solution
Switch does not run; Power is disconnected. Verify that the power cord is properly connected to the
power LED is off. switch, and to the mains supply.
Cannot connect to Be sure the terminal emulator program is set to VT-100
management using compatible, 38400 baud rate, no parity, 8 data bits and
Console connection one stop bit.
Use the included cable, or be sure that the pin-out
complies with a standard null-modem cable.
Cannot connect to switch Be sure the switch has a valid IP address, subnet mask,
management using HTTP and, the default gateway is configured.
SNMP, etc.
Check that your cable is properly connected with a valid
link light, and that the port has not been disabled.
Ensure that your management station is plugged into the
appropriate VLAN to manage the device.
If you cannot connect using the web, the maximum
number of connections may already be open. Try again at
a later time.
No response from the Faulty serial cable Replace the serial cable.
terminal emulation Incorrect serial cable Replace the serial cable for a pin-to-pin straight/flat cable.
software Software Settings Reconfigure the emulation software connection settings.
Response from the Faulty serial cable Replace the serial cable.
terminal emulation Software Settings Reconfigure the emulation software connection settings.
software is not readable
Self-test exceeds 15 The device may not be Remove and reinstall the device. If that does not help,
seconds correctly installed. consult your technical support representative.
No connection is LED Wrong network address in Configure the network address in the workstation.
established and the port the workstation
is on
No network address set Configure the network address in the workstation.
Wrong or missing protocol Configure the workstation with IP protocol.
Faulty ethernet cable Replace the cable.
Faulty port Replace the module.
Faulty module Replace the module.
Incorrect initial Erase the connection and reconfigure the port.
configuration