Microsoft Hyperterminal is one of the most commonly used terminal
emulator programs. This document explains how to use some Hyperterminal
features with Cisco routers.
There are no specific requirements for this document.
This document is not restricted to specific software and hardware
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
For more information on document conventions, refer to the
Technical Tips Conventions.
If you see junk characters in Hyperterminal, or if the router no longer
accepts keystrokes, it can be a Hyperterminal settings issue. Your router
normally uses the default settings.
For information on how to configure those settings in Hyperterminal,
Correct Terminal Emulator Settings for Console Connections.
If the default settings do not produce better results, it is possible
that your router is configured to use nonstandard settings. In order to verify
this, try to connect at different speeds until you get a valid prompt.
If none of the speeds is successful, your router can be in router hang
state. To resolve the problem, refer to
In order to capture the output of long show
commands (for example, from the show tech-support
command) or router debugs, you cannot simply use copy and paste. Instead, use
the Capture Text option from your Hyperterminal as explained
Select Transfer from the menu bar on your
Hyperterminal program, and choose the Capture Text option from
the pull-down menu:
In dialog box that is displayed, create the name of the file you
want to send to the engineer. Then click
Enter the terminal length 0 command at
the router# prompt.
command allows the console to scroll, even if you
do not press the space bar after every screen.
Note: For the
command, "terminal length 0" is on by
Issue the commands the engineer has asked for, such as the
When the command is completed, select the Stop
option from the Capture Text sub menu.
Repeat steps 1 through 5 for as many text captures as you need.
Simply attach your newly created files to an e-mail, and send them to your
Cisco support representative.
Note: It is not necessary to set the terminal length to zero each time.
The terminal length setting stays at zero until another value is set
Enter the terminal length 24 command at
the router# prompt. This causes the console to
pause after each full screen, and allows you to read the output:
In order to recover a password, or troubleshoot router hangs and
booting issues, send a break signal to your router. For Hyperterminal, this is
usually done with the CTRL-Break or CTRL-F6 Break sequence. For a list of
additional possible key combinations, refer to
Break Key Sequence Combinations.
If the router does not accept the break key, carefully read the
Troubleshooting Tips and How to Simulate a Break Key
Sequence sections from the
Break Key Sequence Combinations document.
If for some reason (for example, a boot failure) you need to install a
Cisco IOS® software image through the console port, you can use Xmodem
transfer. For detailed step-by-step instructions, refer to
Console Download Procedure Using ROMmon.