28 Router Card (WS-X3011) Configuration Note
Access the Router Card Command-Line Interface
Almost every configuration command also has a no form. In general, use the no form to disable a
feature or function. Use the command without the keyword no to reenable a disabled feature or to
enable a feature that is disabled by default. For example, IP routing is enabled by default. To disable
IP routing, enter the no ip routing command. Enter ip routing to reenable it. The Cisco IOS
software command reference publication provides the complete syntax for the configuration
commands and describes what the no form of a command does. This manual is available on CD
ROM and in printed form. Refer to the section “Ordering Documentation” at the end of this
document for information about how to obtain these documents.
Getting Context-Sensitive Help
In any command mode, you can get a list of available commands by entering a question mark (?).
Router> ?
To obtain a list of commands that begin with a particular character sequence, type in those characters
followed immediately by the question mark (?). Do not include a space. This form of help is called
word help, because it completes a word for you.
Router# co?
configure connect copy
To list keywords or arguments, enter a question mark in place of a keyword or argument. Include a
space before the question mark. This form of help is called command syntax help because it reminds
you which keywords or arguments are applicable based on the command, keywords, and arguments
you have already entered.
Router# configure ?
memory Configure from NV memory
network Configure from a TFTP network host
terminal Configure from the terminal
<cr>
You can also abbreviate commands and keywords by entering just enough characters to make the
command unique from other commands. For example, you can abbreviate the show command to sh.
Saving Configuration Changes
Any time you make changes to the router configuration, you must save the changes to memory. If
you do not, they will be lost in the event of a system reload or power outage. There are two types of
configuration files: the running (current operating) configuration and the startup configuration. The
running configuration is stored in RAM; the startup configuration is stored in NVRAM.
ROM monitor
ROM monitor commands are used
to perform low-level diagnostics.
You can also use the ROM monitor
commands to recover from a system
failure and stop the boot process in a
specific operating environment.
1
From privileged EXEC mode,
enter the reload EXEC command.
Press Break during the first
60 seconds while the system is
booting.
>
1
You can modify the configuration register value using the config-reg configuration command. Refer to the Cisco IOS configuration
guide for more information.
Mode of
Operation
Usage
How to Enter the Mode
Prompt
