Cisco Systems C819GUK9 Console Download, Command Description, xmodem -cyrx destinationfilename

Appendix C ROM Monitor

Console Download

Console Download

You can use console download, which is 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

cOptional. Performs the download using 16-bit cyclic redundancy check (CRC-16) error checking to validate packets. Default is 8-bit CRC.

yOptional. 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.

rOptional. Image is loaded into DRAM for execution. The default is to load the image into flash memory.

xOptional. Image is loaded into DRAM without being executed.

destination_ Name of the system image file or the system configuration file. For the router to
file_name	recognize it, the name of the configuration file must be router_confg.

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.

	Cisco 819 Integrated Services Routers Software Configuration Guide
C-12	OL-18906-02