System information

A-1

Appendix A: Troubleshooting

Troubleshooting Chart

Symptom Action

Cannot connect using

Telnet, Web browser, or

SNMP software

• Be sure to have configured the agent with a valid IP address, subnet

mask and default gateway.

• Check that you have a valid network connection to the switch and that

the port you are using has not been disabled.

• Check network cabling between the management station and the

switch.

• If you cannot connect using Telnet, you may have exceeded the

maximum number of concurrent Telnet sessions permitted. Try

connecting again at a later time.

Can’t access the on-board

configuration program via

a serial port connection

• Be sure to have set the terminal emulator program to VT100 compatible,

8 data bits, 1 stop bit, no parity and 19200 bps.

• If the switch is configured for Auto (baud rate detection), the terminal

emulator program must be set at 2400~19200 baud, 8 data bits, 1 stop

bit, no parity, and flow control set to none. Also, you must first press the

Enter key once to set the data rate and initialize the connection.

• Check that the null-modem serial cable conforms to the pin-out

connections provided in Appendix B.

Forgot or lost the

password

• Contact Accton Technical Support for help.