1) xmodem―Use this if the computer attached to your console has a terminal emulator that has xmodem capability. 2) tFTPdnld―Use this if you have a TFTP server directly connected to the Ethernet 0 port.
Using the xmodem Command The xmodem command establishes a connection between a console and the router console port for disaster recovery if both the boot and system images are erased from Flash memory. xmodem [filename]―Establishes an xmodem connection between the console and the router. The optional parameter filename specifies the source file containing the Cisco IOS image. Other options include the following: ?-c―use cyclic redundancy check (CRC-16) ?-y―use Ymodem transfer PRotocol ?-r―copy the image to DRAM for launch ?-x―do not launch image on completion of download
Using the tftpdnld Command The tftpdnld command downloads a Cisco IOS software image from a remote server into Flash memory using TFTP. tftpdnld―Begins the TFTP copy command. The following variables are required: ?ip_ADDRESS―The IP address for the router you are using. ?IP_SUBNET_MASK―The subnet mask for the router you are using. ?DEFAULT_GATEWAY―The default gateway for the router you are using. ?TFTP_SERVER―The IP address of the server from which you want to download the image file. ?TFTP_FILE―The name of the file that you want to download. ?The following variables are optional: ?TFTP_VERBOSE―Print setting. 0=quiet, 1=progress, 2=verbose. The default is 1. ?TFTP_RETRY_COUNT―Retry count for ARP and TFTP. The default is 7. ?TFTP_TIMEOUT―Overall timeout of the download Operation in seconds. The default is 2400 seconds. ?TFTP_CHECKSUM―Performs a checksum test on the image. 0=no, 1=yes. The default is 1. The syntax for specifying the variables is: VARIABLE_NAME=value
After you specify the variables, you must reenter the tftpdnld command. For example: rommon 1 > tftpdnld
