Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
16
No. Failure description Items to check
5 Login is not possible. Perform the following procedure:
1. Make sure that the login prompt is displayed on the screen. If it is not,
the Switch is starting up. Wait a while.
2. Execute the procedure described in
3.1 Login-related problems.
If you are unable to log in, the internal flash memory might be
corrupted. Try to execute the format flash operation command.
6 When the communication
speed of the
communication software
is changed after login,
unexpected characters
are displayed and no
commands can be
entered.
Despite changing the communication speed of the communication
software after login, correct display is not possible. Restore the original
communication speed of the communication software.
7 A user wants to use Tera
Term Pro to log in, but
unexpected characters
are displayed during login.
Negotiation with the communication software might not have been
performed correctly. See No. 3. Issue a break signal by pressing the
Alt+B keys simultaneously. Note, however, that the login window might
not be displayed unless the break signal is issued several times,
depending on the communication speed of Tera Term Pro.
8 Item names and the
corresponding content are
displayed out of
alignment.
The displayed information might be greater than the maximum number of
characters that can be displayed on one line. Change the window size
setting of the communication software to 80 characters by 24 lines to
increase the number of characters that can be displayed on one line.
3.2.2 Login from a remote terminal is not possible
If a problem occurs during connection to a remote terminal (via telnet or FTP), check the
status according to the following table.
Table 3-2 Problems occurring during connection to a remote terminal and action to take
No. Problem Action
1 Remote connection is not
possible.
Perform the following procedure:
1. Use the ping operation command from a PC or workstation to make
sure that a route for remote connection has been established.