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Cisco 2600 Series Routers Hardware Installation Guide
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Appendix C Using the ROM Monitor
ROM Monitor Syntax Conventions
ROM Monitor Syntax Conventions
The ROM monitor syntax in this appendix uses the following conventions:
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Square brackets [ ] denote an optional element. In the following example, the element abc is not
required, but you can specify it if you choose:
command [abc]
•
If a minus option is followed by a colon (for example, [-s:]) you must provide an argument for the
option.
•
A term in italics means that you must fill in the appropriate information. In the following example,
you replace the term in italics with the interface type you are using:
command type interface
Command Descriptions
This section lists some useful ROM monitor commands. Refer to the Cisco IOS configuration guides and
command references for more information on ROM monitor commands.
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boot or b—Boot an image.
–
b boots the first image in Flash memory.
–
b flash:[name] boots the Cisco IOS software from the Flash memory.
–
b filename tftpserver boots from the specified file over the network from the specified Trivial
File Transfer Protocol (TFTP) server. For example:
boot c2600-i-mz 172.15.19.11
–
b filename boots from the boothelper image because it does not recognize the device ID. This
form of the command is used to netboot the image named filename.
Cisco 2600 series routers do not have a dedicated boothelper image ([rx]boot) as used by some
other Cisco routers. With Cisco 2600 series routers, the first image in Flash memory is invoked
as the default boothelper image anytime the ROM monitor does not recognize the device ID in
the boot command.
You can override the default boothelper image setting by setting the BOOTLDR monitor
environment variable to point to another image. Any system image can be used for this purpose.
Options to the boot command are -x, load image but do not execute, and -v, verbose.
Use the Cisco IOS commands show version and show hardware to see the source of the currently
running image.
•
dir device:[partition:]—List the files on the named device. For example:
rommon 8 > dir flash:
File size Checksum File name
2229799 bytes (0x220627) 0x469e C2600-j-m2.113-4T
•
help—View a summary of ROM monitor commands (equivalent to ?).
