R2511-HP MSR Router Series Terminal Access Configuration Guide(V5)

76
Number Prom
p
t Descri
p
tion
14
(authentication failed, invalid TTY
No.!)
Authentication of a terminal failed. The terminal number is
not identical to that configured in the ttyd configuration
file on the Unix server.
15
(authentication failed, unknown
error!)
Authentication of a terminal failed. An unknown error
occurred.
Terminal access troubleshooting
If you are having trouble with terminal access, the following sections might provide the solution.
Check if there is any prompt displayed on the terminal
1. If there is a prompt displayed on the terminal
For more information, see "Prompts on terminals "or" Check whether the router and Unix server
can ping each other."
2. If there is no
prompt displayed on the terminal
For more information, see "Check whether the cable connecting the terminal to the router is OK."
3. Verify terminal connectivity by using the terminal connectivity test hotkey
In router terminal access, a command is provided for testing terminal connectivity. This command
can be used to test the physical connectivity between a terminal and a router and the TCP
connectivity between the terminal and the Unix server. When the terminal connectivity test hotkey
is configured in interface view, the terminal connectivity test function is enabled.
Now, you can enter the test hotkey on the terminal. If the physical connectivity between the
terminal and router is correct, the terminal screen will display "Terminal to Router test OK!" if you
have set the language type to English on the Unix server. This means the connectivity between the
terminal and the asynchronous serial interface of the router is correct and they can exchange data
with each other normally. For more information, see "Check whether the router and Unix server
can ping each other." If the TCP conn
ection between the terminal and the Unix server is correct,
the terminal screen displays "Terminal to Unix test OK!" This means a TCP connection has been
established between the application used by the terminal and the ttyd program on the UNIX server,
and the terminal can communicate with the server normally. For more information, see "For an
active term
inal, verify the configuration of system file inittab."
Check whether the cable connecting the terminal to the router is OK
1. Pin assignment of the asynchronous serial interface and terminal access converter
If the terminal displays nothing on its screen, verify that the cable connection is correct. Different
models of terminals have different pin assignments with their primary serial interfaces, so a certain
type of converter may be required.
In terminal access, 8ASE and 16ASE modules and their cables are most frequently used. The
connection cables for the 8ASE/16ASE modules have 8/16 asynchronous serial interfaces,
namely 8AS/16AS cables, which fall into three types: 8AS/16AS cable (DB-25/DB-9),
8AS/16AS cable (RJ-45 for telecom), and 8AS/16AS cable (RJ-45 for banks). "Telecom" means
that the 8AS/16AS (RJ-45) cables, which are blue, are for telecom carriers. "Bank" means that the
8AS/16AS (RJ-45) cables which are white and labeled with "Dumb Terminal" are used for
terminal access in banks.
The following table describes the pins of 8AS/16AS cables.