Installation guide

Cisco 4000-M ROM Monitor E-3
Entering the Cisco 4000-M ROM Monitor Program
over the network using the TFTP. You can also include a second argument, host, which
is the Internet address or name of a particular server host. You must enter i and press
Return before entering b. The various forms of the b command follow:
b—Boots the default system software from ROM.
b filename [host]—Boots from a network server (netboots) using TFTP.
b flash—Boots the first file in Flash memory
b flash [filename]—Boots the file (filename) from Flash memory
To prevent the router from automatically booting over the network, enter the o/r 0x0
command as follows:
> o/r 0x0
• Continue—The c command allows you to exit the ROM monitor without rebooting the
router after you press the Break key while running the system software image.
• Help—The h command prints a summary of the ROM monitor commands to the
console screen.This is the same output as entering ?.
• Initialize—The i command causes the ROM monitor to reinitialize the hardware, clear
the contents of memory, and boot the system if so directed by the boot field in the virtual
configuration register. (It is best to use the i command before running any tests or
booting software.)
• Display Stack Trace—The k command displays a stack trace of the last running system
software. This will be useful as a diagnostic reading if a problem occurs, such as an
unexpected system crash.
• Display/Reset Virtual Configuration Register—The o command displays the virtual
configuration register. The o command used with the /r option will reset the
configuration register to the default and cause the system software image to ignore the
configuration register information (sets the ignore NVRAM contents bit, 0x0040). To
reset to the default, enter the following at the > prompt:
o/r
Enter the i command after entering the o/r command to automatically reboot the router.
Table E-1 lists additional o command options.