3Com 3C16630A User Manual

Contents

C-2 APPENDIX C: TROUBLESHOOTI NGDUA1663-0BAA03If you still cannot resolve the problem, the Module itself may be faulty.Contact your supplier.Screens are incorrectly displayed.Check that your terminal or terminal emulator is correctly configured tooperate as a VT100 terminal.Check the settings on your terminal or emulator. The parity must set to’none’, the stop bit ’1’ and the character size ’8’. The managementfacility's autoconfiguration works only with speeds from 1200 to 9600baud.The SNMP manager cannot access the device.Check the device's IP address, subnet mask and default router arecorrectly configured (see “Setup” on page 3-10) and the device hasbeen reset (see “Reset” on page 3-48). Check that the device's IPaddress is correctly recorded by the SNMP manager (refer to the usermanual for the manager).The Telnet workstation cannot access the device.Check the device's IP address, subnet mask and default router arecorrectly configured (see “Setup” on page 3-10) and the device hasbeen reset (see “Reset” on page 3-48). Ensure that you enter the IPaddress correctly when invoking the Telnet facility.Traps are not received by the SNMP manager.Check the SNMP manager's IP address and the community string iscorrectly configured (see “Trap Setup” on page 3-13).The SNMP manager or Telnet workstation can no longeraccess the device.Check that Remote Telnet access or Community-SNMP access isenabled (see “Local Security” on page 3-18).Check that the port through which you are trying to access the devicehas not been disabled (see “Port Setup” on page 3-36). If it is enabled,check the connections and network cabling at the port.