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B-1
Appendix B: Troubleshooting
Table B-1. Troubleshooting Chart
Symptom Action
Cannot connect using Telnet,
Web browser, or SNMP
software
• Be sure you have configured the agent with a valid IP address, subnet
mask and default gateway.
• If you are trying to connect to the agent via the IP address for a tagged
VLAN group, your management station must include the appropriate tag
in its transmitted frames.
• 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 or SSH, you may have exceeded the
maximum number of concurrent Telnet/SSH sessions permitted. Try
connecting again at a later time.
Cannot access the on-board
configuration program via a
serial port connection
• Be sure you have set the terminal emulator program to VT100 compatible,
8 data bits, 1 stop bit, no parity, and the baud rate set to any of the
following (9600, 19200, 38400, 57600, 115200 bps).
• Check that the null-modem serial cable conforms to the pin-out
connections provided in the Installation Guide.
Forgot or lost the password • Contact your local distributor.