Appendix B: Troubleshooting

Problems Accessing the Management Interface

 

Table B-1 Troubleshooting Chart
Symptom

Action

 

 

Cannot connect using Telnet,

• Be sure the switch is powered up.
web browser, or SNMP

• Check network cabling between the management station and the switch.

software

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

 

 

port you are using has not been disabled.

 

• Be sure you have configured the VLAN interface through which the

 

management station is connected with a valid IP address, subnet mask

 

and default gateway.

 

• Be sure the management station has an IP address in the same subnet as

 

the switch’s IP interface to which it is connected.

 

• If you are trying to connect to the switch via the IP address for a tagged

 

VLAN group, your management station, and the ports connecting

 

intermediate switches in the network, must be configured with the

 

appropriate tag.

 

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

 

number of concurrent Telnet/SSH sessions permitted. Try connecting

 

again at a later time.

 

 

Cannot connect using

• If you cannot connect using SSH, you may have exceeded the maximum

Secure Shell

number of concurrent Telnet/SSH sessions permitted. Try connecting

 

again at a later time.

 

• Be sure the control parameters for the SSH server are properly configured

 

on the switch, and that the SSH client software is properly configured on

 

the management station.

 

• Be sure you have generated a public key on the switch, and exported this

 

key to the SSH client.

 

• Be sure you have set up an account on the switch for each SSH user,

 

including user name, authentication level, and password.

 

• Be sure you have imported the client’s public key to the switch (if public

 

key authentication is used).

 

 

Cannot access the on-board

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

configuration program via a

8 data bits, 1 stop bit, no parity, and the baud rate set to any of the

serial port connectionfollowing (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.

 

 

B-1