Cisco 805 Router Software Configuration Guide - ROM Monitor [Cisco 800 Series Routers]

Table Of Contents

ROM Monitor

Using ROM Monitor

ROM Monitor Modes

Configuring Basic Configuration Parameters

Commands

Booting from a TFTP Server

Upgrading TinyROM Using TFTP

ROM Monitor

This appendix describes the Cisco 805 router ROM monitor. The ROM monitor runs when the router is powered up or reset and helps to initialize the processor hardware and boot the operating system software.

You might need to access the ROM monitor for the following reasons:

•To reconfigure certain basic configuration parameters, such as the baud rate of the console port

•To set up your router to boot from a TFTP server on an Ethernet network (rather than to boot from Flash memory, which is the default)

To use the ROM monitor, you must connect a terminal or PC to the light-blue console port on the router. (For information on making this connection, see the Cisco 805 Router Hardware Installation Guide.)

Using ROM Monitor

To use the ROM monitor, perform the following steps:

Step 1 Determine whether the Flash memory contains a software image or not.

The Flash memory contains a software image unless you deleted it by using the ROM monitor erase command.

Step 2 Reload the software by doing one of the following:

•Enter the following command in privileged EXEC mode:

router# reload

•Turn the router to STANDBY, wait 5 seconds, and then turn it to ON again.

Step 3 Perform this step only if Flash memory contains a software image. Before the terminal or PC displays Boot..,...(approximately 10 seconds), press Escape, Control-C, or Break.

The router enters the ROM monitor as indicated by the following prompt:
boot#
While in the ROM monitor, you can access basic configuration parameters and commands. The parameters and commands that you can access depends on the mode you are in. For more information on modes, see the next section. For information on parameters, see the "Configuring Basic Configuration Parameters" section later in this appendix. For information on commands, see the "Commands" section later in this appendix.

ROM Monitor Modes

The ROM monitor consists of the following modes:

•Enable—You can set all parameters and issue all commands in enable mode. By default, you are in enable mode when you enter the ROM monitor (boot #).

•Disable—You can set a small subset of parameters and issue a small subset commands in disable mode. If you set up a ROM monitor password, you are in disable mode when you enter the ROM monitor (boot >).

Note Cisco does not recommend setting a ROM monitor password. The only situation in which you should set a password is if you allow remote access via a modem to the ROM monitor. If you set this password, you will be in disable mode when you enter the ROM monitor and must enter the password if you want to enter enable mode. If you forget this password, you must contact the Cisco Technical Assistance Center to recover it.

You can access these modes by entering the following commands at the ROM monitor prompt:

•To access enable mode, enter the enable command.

•To access disable mode, enter the disable command.

The parameters and commands that you can access depends on the mode you are in. For more information on parameters, commands, and modes, see the "Configuring Basic Configuration Parameters" section and the "Commands" section later in this appendix.

Configuring Basic Configuration Parameters

To access a listing of the basic configuration parameters and their possible settings, enter the following command:
boot# set ?
A display similar to the following appears:
set baud	={300|1200|2400|4800|9600|19200|38400|57600|115200}
set data-bits	={7|8}
set parity	={none|even|odd}
set stop-bits	={1|2}
set console-flags	={rts|dsr}
set mac-address	=X.X.X
set unit-ip	=N.N.N.N
set serv-ip	=N.N.N.N
set netmask	=N.N.N.N
set gate-ip	=N.N.N.N
set pkt-timeout	=N (seconds)
set tftp-timeout	=N (seconds)
set boot-action	={flash|tftp|none}
set debug-flags	=N
set file-name	="file-name"
set watchdog	={off|on}
set prompt	="prompt-string"
set ios-conf	=N
Note This display shows all available parameters. The parameters that actually display depends on which mode you are in. For information on modes, see the "ROM Monitor Modes" section earlier in this appendix.

To configure a parameter, use the following command at the ROM monitor prompt:
set parameter=value
For example, to set the baud rate parameter to 19200, enter the following:
boot# set baud=19200
describes the parameters, their defaults, and which modes they can be configured in.

Table A-1 Basic Configuration Parameters

Parameter

Description

Default

Modes

baud¹

Baud rate of console port.

9600

enable

data-bits1

Data bits of console port.

8

enable

parity1

Parity of console port.

-

enable

stop-bits1

Stop bits of console port.

1

enable

console-flags1

Flags for console port.

•rts—the DTE device drives RTS pin on console port.

•dsr—the DSR pin is not asserted until the Cisco IOS software boots.

Enter 1 for rts, 2 for dsr, or 3 for both.

0

enable

mac-address

Ethernet MAC address for your router, such as 0BAD.1BAD.2BAD.

xxxx.xxxx.xxxx (Factory sets this value.)

enable

unit-ip

IP address of your router.

0.0.0.0

enable

serv-ip

IP address of your TFTP server. Used only if router is set up to boot from a TFTP server on your network.

0.0.0.0

enable

netmask

Subnet mask for IP address.

0.0.0.0

enable

gate-ip

Default gateway IP address. Used only if router is set up to boot from a TFTP server and if the server is on a different subnet.

0.0.0.0

enable

pkt-timeout

Number of seconds before router retries a TFTP ACK or RRQ.

4

enable

tftp-timeout

Number of seconds before TFTP ACK or RRQ fails.

16

enable

boot-action

Action that router takes on power up:

•flash—run filename in Flash memory.

•tftp—load filename (software image or script) on TFTP server, then run it.

•none—enter command-line interface (CLI), and wait for user input.

flash

enable

file-name

Default filename for boot and upload commands, such as c805-y6-mw.

c805-y6-mw

enable

watchdog², ³

Automatic reboot if router becomes nonfunctional.

on

enable

prompt

CLI prompt string.

boot #

disable, enable

ios-conf

Reset the configuration register. Equivalent to config-register software command.

0

enable

¹Reset the console port to recognize the new setting of this parameter by using the reset command.

²Save this configuration, then turn the power to standby, and then on again for this new setting to take effect.

³This parameter is not currently supported.

Commands

To access a listing of the ROM monitor commands and a brief description of each command, enter the following command:
boot# help
A display similar to the following appears:
boot	Execute image or CLI command script.
delete	Deletes file-name from flash (8th delete is permanent).
disable	Disable privileged commands.
echo	Display arguments (to test CLI behavior).
enable	Enable privileged or debug commands.
flash	Single cycle id/erase/write test for each flash chip.
help	Display help for command (* for all).
list	List files currently in ram and saved in flash.
load	Load saved boot environment from flash.
passwd	Set or change the ROM password.
reset	Reset console port to current parameters.
set	Set boot environment values.
save	Save boot environment or loaded file to flash.
show	Show current or saved boot environment.
test	Initiate endless H/W bringup testing.
upload	Load image or configuration data into RAM.
undelete	Undelete file-name (maximum of 8 deletes & undeletes).
Note This display shows all available commands. The commands that actually display depend on which mode you are in. For information on modes, see the "ROM Monitor Modes" section earlier in this appendix.

describes the commands and which modes they can be used in.

Table A-2 ROM Monitor Commands

Commands

Description

Mode

boot [flash | tftp]
[= filename]

•By default, router boots a loaded file if present.

•If you specify flash, router executes file stored in Flash memory.

•If you specify tftp, router loads TFTP file (image or script) and executes it.

enable

delete filename

Marks specified filename as deleted from Flash memory. (You need to specify pathname as well as filename.) The eighth time you delete a specified filename, the file is permanently deleted.

enable

disable

Enter disable mode, which has access to fewer parameters and commands than enable mode.

disable, enable

echo [arguments]

Display arguments to test the CLI.

enable

enable

Enter enable mode.

disable, enable

erase

Erases files marked for deletion from Flash memory.

enable

help [command | *]

•Enter help or help * to display a brief description of each available command.

•Enter help command to display a brief description of a particular command.

disable, enable

list

List files currently in RAM and saved in Flash memory.

disable, enable

load

Load current software configuration stored in Flash memory.

disable, enable

passwd

Set or change the ROM monitor password, which protects the enable-mode commands. Cisco recommends setting up this password only if you allow remote access to the ROM monitor. If you set up a password, you will enter the disable mode in the ROM monitor and must enter the password if you want to enter the enable mode. If you forget the password, you must contact the Cisco Technical Assistance Center to recover it.

enable

reboot

Resets the hardware, and boots the software.

enable

reset

Reset console port to recognize reconfigured parameters.

enable

save [file [= file-name]]

•Enter save to save current configuration to Flash memory.

•Enter save file to save loaded file to Flash memory as the current filename.

•Enter save file=filename to save loaded file to Flash memory as the specified filename.

•Enter list to determine filename.

enable

set [variable={value | ?}]
[? [variables | *]]

•Enter set to display all parameters and their current values.

•Enter set ? to display all parameters and their possible values.

•Enter set ? variable to display a description of a particular parameter and its possible values or set ? * to display a description of all available parameters and their possible values.

•Enter set variable=value to configure a parameter. Enter set variable=? to display a description of the specified parameter and its possible values.

disable, enable

show [saved]

Show current or saved configuration.

disable, enable

upload [serial | tftp | xmodem] [= filename]

Load software image or configuration data from the specified source into RAM.

enable

undelete [filename]

Undo the deletion of specified filename up to eight times.

enable

Booting from a TFTP Server

Before setting up your router to boot from a TFTP server, you must understand that booting from a TFTP server consumes more dynamic RAM (DRAM) than booting from Flash memory. The amount of DRAM lost is equivalent to the software image size and is displayed when the router boots.

To set up your router to boot from a TFTP server that is on an Ethernet network, follow these steps:

Step 1 Set IP addresses for the router and the TFTP server by entering the following commands:

set unit-ip=ip-address

set serv-ip=ip-address

Step 2 Set up the subnet mask by entering the following command:

set netmask=subnet-mask

Step 3 If the TFTP server is on a different subnet than the router, set up an IP address for a gateway server by entering the following command:

set gate-ip=ip-address

Step 4 Set up the filename for the software image or script that will reside on the TFTP server by entering the following command:

set file-name=filename

Your TFTP server configuration determines the filename.

Step 5 Boot the software by using one of the following methods:

(a) If you want to set up the router to boot from the TFTP server each time you power-on the router, enter the following command:
boot# set boot-action=tftp
Save the current configuration to Flash memory by entering the save command. Turn the power to STANDBY and then to ON again.

(b) If you want to boot from the TFTP server now but not each time you power-on the router, enter the following command:
boot# boot tftp=[filename]
Upgrading TinyROM Using TFTP

Follow these steps to upgrade the TinyROM using Trivial File Transfer Protocol (TFTP). This procedure is based on the following network example:

•Cisco 800 series router with an IP address of 10.1.0.1 and a subnet mask of 255.255.255.0

•TFTP server with an IP address of 10.2.0.2

•Gateway server with an IP address of 10.1.0.2

Step 1 To download the current version of TinyROM from the Cisco Web site, go to the following URL: http://www.cisco.com

Step 2 Click Login to log into CCO. When prompted, enter your username and password.

Step 3 Go to the Software Center: Access Products: 800 Series

Step 4 Transfer the TinyROM image to your TFTP server. (Be sure to use binary transfer mode when any TCP/IP transfer method such as TFTP or FTP is used.)

Note The following upgrade procedure is initiated from TinyROM (also known as boot) mode. The ISDN connection is unavailable during the upgrade process.

Step 5 Enter the TinyROM by performing the following steps:

(a) Reload the software by doing one of the following:

–Enter the following command from privileged EXEC mode:
router# reload
–Turn the router to standby, wait 5 seconds, then turn it on again.

(b) Immediately press Escape, Control-C, or Break.

This forces the router to enter the TinyROM as indicated by the following prompt:
boot#
Step 6 Set IP address for the TFTP server:
boot# set serv-ip = 10.2.0.2
Step 7 Set IP address and subnet mask for the router:
boot# set unit-ip = 10.1.0.1 
boot# set netmask = 255.255.255.0
Step 8 If the TFTP server is on a different subnet than the router, set up an IP address for a gateway server:
boot# set gate-ip = 10.1.0.2
Step 9 Download the software image from the TFTP server:
boot# upload tftp =c800u-tinyrom-mw
TFTP initiated.
upload: succeeded (4 seconds).
Step 10 When the transfer is complete, save the new TinyROM image to Flash memory:
boot# save file
The router then saves the new TinyROM to Flash memory and automatically reboots into normal running mode.