Tftp Download Command Variables - Cisco 1812W - Integrated Services Router Wireless Configuration Manual

Appendix C ROM Monitor
Command Descriptions
Table C-1
Table C-1
Command
help or ?
-?
reset or i
dir device:
boot commands
b
b flash: [filename] Attempts to boot the image directly from the first partition of flash memory. If you
Disaster Recovery with TFTP Download
The standard way to load new software on your router is to use the copy tftp flash privileged EXEC
command from the Cisco IOS software command-line interface (CLI). However, if the router is unable
to boot Cisco IOS software, you can load new software while in ROM monitor mode.
This section describes how to load a Cisco IOS software image from a remote TFTP server to the router
flash memory. Use the tftpdnld command only for disaster recovery, because it erases all existing data
in flash memory before downloading a new software image to the router.

TFTP Download Command Variables

This section describes the system variables that can be set in ROM monitor mode and that are used
during the TFTP download process. There are both required variables and optional variables.
OL-6426-02
describes the most commonly used ROM monitor commands.
Commonly Used ROM Monitor Commands
Description
Displays a summary of all available ROM monitor commands.
Displays information about command syntax; for example:
rommon 16 > dis -?
usage : dis [addr] [length]
The output for this command is slightly different for the xmodem download
command:
rommon 11 > xmodem -?
xmodem: illegal option -- ?
usage: xmodem [-cyrxu] <destination filename>
-c CRC-16
-y ymodem-batch protocol
-r copy image to dram for launch
-x do not launch on download completion
-u upgrade ROMMON, System will reboot after upgrade
Resets and initializes the router, similar to a power up.
Lists the files on the named device; for example, flash memory files:
rommon 4 > dir flash:
Directory of flash:/
2 -rwx 10283208 <date> c1800-advsecurityk9-mz
9064448 bytes available (10289152 bytes used)
For more information about the ROM monitor boot commands, see the
Configuration Fundamentals and Network Management
Boots the first image in flash memory.
do not enter a filename, this command will boot this first image in flash memory.
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
Command Descriptions
Cisco IOS
Guide.
C-3