15
Using the ROM Monitor
OL-5997-02
How to Use the ROM Monitor—Typical Tasks
Downloading Files over the Router Console Port (xmodem)
This section describes how to download a file over the router console port by using the Xmodem
Protocol. Use the console download function when you do not have access to a TFTP server but need to
download a system image or configuration file to the router. This procedure can also be used when there
are no TFTP servers or network connections, and a direct PC connection to the router console is the only
viable option.
For more information about using Xmodem, see the Xmodem Console Download Procedure Using
ROMmon at the following URL:
http://www.cisco.com/warp/public/130/xmodem_generic.html
Prerequisites
•
Download the file to your PC. Go to the Software Center at the following URL:
http://www.cisco.com/kobayashi/sw-center/index.shtml.
•
Connect your PC to the router console port and launch a terminal emulator program. To see
examples for how to perform this task for similar routers, see the
Xmodem Console Download
Procedure Using ROMmon tech note.
Restrictions
•
If you use a PC to download a file over the router console port at 115,200 bps, make sure that the
PC serial port uses a 16550
universal asynchronous receiver/transmitter (UART).
•
If the PC serial port does not use a 16550 UART, we recommend using a speed equal to or lower
than 38,400 bps for downloading a file over the console port.
•
Transfer using the xmodem command works only on the console port.
•
You can only download files to the router. You cannot use the xmodem command to retrieve files
from the router.
•
Because the ROM monitor console download uses the console to perform the data transfer, error
messages are displayed on the console only after the data transfer is terminated. If an error occurs
during console download, the download is terminated, and an error message is displayed. If you
changed the baud rate from the default rate, the error message is followed by a message that tells
you to restore the terminal to the baud rate that is specified in the configuration register.
SUMMARY STEPS
1.
xmodem [-[c][y][r][x]] destination-file-name
DETAILED STEPS
Step 1
xmodem [-[c][y][r][x]] destination-file-name
Use this command to download a file over the console port using the ROM monitor. For example:
rommon > xmodem -c c2801-is-mz.122-10a.bin
See Table 1 for xmodem command syntax descriptions.
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