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B
Problems Accessing the Management Interface
Troubleshooting
Table 36: Troubleshooting Chart
Symptom
Cannot connect using
Telnet, web browser, or
SNMP software
Cannot connect using
Secure Shell
Cannot access the on-
board configuration
program via a serial port
connection
Forgot or lost the password
Action
◆
Be sure the switch is powered up.
◆
Check network cabling between the management station and the
switch.
◆
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.
◆
If you cannot connect using SSH, you may have exceeded the
maximum 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 both an RSA and DSA public key on the
switch, exported this key to the SSH client, and enabled SSH service.
◆
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).
◆
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
115200 bps).
◆
Check that the null-modem serial cable conforms to the pin-out
connections provided in the Installation Guide.
◆
Contact your local distributor.
– 527 –
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