Information Technology Reference
In-Depth Information
Booting: Unresponsive Terminal Connection to Unconfigured Access Server
Symptom
: A terminal connected to an unconfigured access server is unresponsive. The terminal,
attached to the console port of an unconfigured Cisco access server, displays bootup banners and begins
the setup routine, but the user cannot input commands from the terminal keyboard.
Table 3-20 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table3-20 Booting: Unresponsive Terminal Connection to Unconfigured Access Server
Possible Problem
Solution
Flow control
configured on the
terminal conflicts
with the
EIA/TIA-232
control signals
supported by the
access server
console port
(RJ-45 to DB-25)
1.
Check whether flow control is configured on your terminal.
2.
Disable all flow control on the terminal. With flow control
enabled, the terminal will wait indefinitely for a CTS signal
because the RJ-45 console port on the access server does not
assert CTS.
For information on how to check for and disable flow control on
your specific terminal, consult the documentation provided by
your terminal manufacturer.
Alternatively, you can “strap,” or short, CTS high by
providing the proper voltage on the CTS signal lead to make
the signal active. Find an unused signal that is known to be
active and strap CTS to it. The terminal sees CTS being
asserted (indicating that the access server is ready to receive
data) and allows input to be entered.
3.
On an already configured access server, another solution is
to connect your terminal to the auxiliary port of the access
server. The auxiliary port, unlike the console port, asserts
CTS, and the terminal will therefore allow input. However,
on a new access server with no configuration, this is not an
alternative because the bootup banners and setup routine are
seen only on the console port.
4.
Hardware
problem
1.
Check all hardware—including cabling (broken wires),
adapters (loose pins), access server ports, and the terminal
itself—for damage.
2.
Replace any hardware that is damaged or excessively worn.
For more information, refer to the information in the
"Troubleshooting Hardware" section found earlier in this
chapter.
