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Starting a Router Terminal Session
Parameter
Stop bits
Using the Ctrl-C Command
The router console port is located on the router exterior and is accessible by removing the seal over the console
port (see Figure: CPU Module with Console Port).
On many Cisco routers, you can enter Ctrl-C to interrupt the router startup process and then delete or change
the admin password, or view or delete the router configuration.
To prevent unauthorized access to the router configurations and passwords, the Ctrl-C command is disabled
on the router while it is booting up and loading the system software.
Connecting to the Console Port with Microsoft Windows
To connect to the router console port using Microsoft Windows:
Step 1
Start a terminal emulator application, such as Windows HyperTerminal (included with some versions of Windows OS)
or
PuTTY
.
Step 2
Configure the terminal emulation software with the parameters described in
Step 3
Connect to the router.
Connecting to the Console Port with Mac OS X
To connect a Mac OS X system USB port to the console using the built-in OS X Terminal utility:
Step 1
Use the Finder to go to Applications > Utilities > Terminal.
Step 2
Connect the OS X USB port to the router.
Step 3
Enter the following commands to find the OS X USB port number:
Example:
macbook:user$ cd /dev
macbook:user$ ls -ltr /dev/*usb*
crw-rw-rw-
1 root
Step 4
Connect to the USB port with the following command followed by the router USB port speed:
Example:
macbook:user$ screen /dev/tty.usbmodem1a21 9600
To Disconnect the OS X USB Console from the Terminal Window
Console Port Setting
Description
1
Specifies the number of stop bits for an asynchronous line.
wheel
9,
66 Apr
Cisco Catalyst IR8140 Heavy Duty Series Router Hardware Installation Guide
About the Console Port, on page
1 16:46 tty.usbmodem1a21 DT-macbook:dev user$
Using the Ctrl-C Command
93.
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