3Com 9100 User Manual page 150

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150
PPENDIX ROUBLESHOOTING
Using the
Command-Line
Interface
Switch does not power up:
The Switch 9100 uses a digital power supply with surge protection. In the
event of a power surge, the protection circuits shut down the power
supply. To reset, unplug the switch for 1 minute, plug it back in, and
attempt to power up the switch.
If this does not work, try using a different power source (different power
strip/outlet) and power cord.
The initial welcome prompt does not display:
Check that your terminal or terminal emulator is correctly configured.
For console port access, you may need to press [Return] several times
before the welcome prompt appears.
Check the settings on your terminal or terminal emulator. The settings are
9600 baud, 8 data bits, 1 stop bit, no parity, XON/OFF flow control
enabled.
The SNMP Network Manager cannot access the device:
Check that the device IP address, subnet mask, and default router are
correctly configured, and that the device has been reset.
Check that the device IP address is correctly recorded by the SNMP
Network Manager (refer to the user documentation for the Network
Manager).
Check that the community strings configured for the system and
Network Manager are the same.
Check that SNMP access was not disabled for the system.
The Telnet workstation cannot access the device:
Check that the device IP address, subnet mask and default router are
correctly configured, and that the device has been reset. Ensure that you
enter the IP address of the switch correctly when invoking the Telnet
facility. Check that Telnet access was not disabled for the switch. If you