APPENDIX A

TROUBLESHOOTING

Troubleshooting Chart

 

Troubleshooting Chart

 

 

Symptom

Action

 

 

Cannot connect

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

using Telnet, Web

address, subnet mask and default gateway.

browser, or SNMP

• Be sure that your management station has management

software

 

VLAN access to the switch (default is VLAN 1).

 

• 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.

 

 

Cannot access

• Be sure to have set the terminal emulator program to

the on-board

VT100 compatible, 8 data bits, 1 stop bit, no parity and

configuration

9600 bps.

program via a serial

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

port connection

 

pin-out connections provided in Appendix B.

 

 

Forgot or lost the

• Reinstall the switch defaults or runtime code. Make a direct

password

connection to the switch’s console port and power cycle

 

the switch. During the POST diagnostics, access the

 

firmware-download menu and select the appropriate

 

options. See “Upgrading Firmware via the Serial Port” on

 

page A-2 for more details.

 

 

A-1

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SMC Networks SMC6750L2 manual Appendix a Troubleshooting, Troubleshooting Chart