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C-7
Cisco Secure Router 520 Series Software Configuration Guide
OL-14210-01
Appendix C ROM Monitor
Console Download
Console Download
You can use console download, a ROM monitor function, to download either a software image or a
configuration file over the router console port. After download, the file is either saved to the mini-flash
memory module or to main memory for execution (image files only).
Use console download when you do not have access to a TFTP server.
Note If you want to download a software image or a configuration file to the router over the console port, you
must use the ROM monitor dnld command.
Note If you are using a PC to download a Cisco IOS image over the router console port at 115,200 bps, ensure
that the PC serial port is using a 16550
universal asynchronous transmitter/receiver (UART). If the PC
serial port is not using a 16550
UART, we recommend using a speed of 38,400 bps or less when
downloading a Cisco IOS image over the console port.
Command Description
The following are the syntax and descriptions for the xmodem console download command:
xmodem [-cyrx] destination_file_name
Follow these steps to run Xmodem:
Step 1 Move the image file to the local drive where Xmodem will execute.
Step 2 Enter the xmodem command.
c Optional. Performs the download using 16-bit cyclic redundancy check (CRC-16) error
checking to validate packets. Default is 8-bit CRC.
y Optional. Sets the router to perform the download using Ymodem protocol. The default
is Xmodem protocol. The protocols differ as follows:
• Xmodem supports a 128-block transfer size. Ymodem supports a 1024-block
transfer size.
• Ymodem uses CRC-16 error checking to validate each packet. Depending on the
device that the software is being downloaded from, this function might not be
supported by Xmodem.
r Optional. Image is loaded into DRAM for execution. The default is to load the image
into flash memory.
x Optional. Image is loaded into DRAM without being executed.
destination_
file_name
Name of the system image file or the system configuration file. In order for the router
to recognize it, the name of the configuration file must be router_confg.