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Cisco IOS XR Getting Started Guide
OL-10957-02
Chapter 4 Configuring General Router Features
Managing Configuration Sessions
Saving the Target Configuration to a File
Target configurations can be saved to a separate file without committing them to the running
configuration. Target configuration files can then be loaded at a later time and further modified or
committed.
To save the configuration changes in the target configuration to a file, enter the save configuration
device: command. Replace the device argument with the name of the device on which you want to store
the file (for example, disk0). After you enter this command, the router prompts you to enter a filename.
If you enter only a filename, the file is stored in the root directory of the device. To store the file in a
directory, enter the directory path and filename when prompted. We recommend that you specify the
cfg
file extension for easy identification. This suffix is not required, but it can help locate target
configuration files. Example:
myconfig.cfg
In the following example, a target configuration file is saved to the usr/cisco directory of disk0:
RP/0/RP1/CPU0:router(admin-config)# save configuration disk0:
Destination file name (control-c to abort): [/running-config]?/usr/cisco/test.cfg
Building configuration.
1 lines built in 1 second
[OK]
Note You can also save a configuration to a file using the show configuration | file filename command.
Loading the Target Configuration from a File
To populate the target configuration with the contents of a previously saved configuration file, go to
global configuration or administration configuration mode and Enter the load filename command.
Consider the following when entering the filename argument:
• The filename argument specifies the configuration file to be loaded into the target configuration.
• If the full path of the file is not specified, the router attempts to load the file from the root directory
on the device.
In the following example, a target configuration file is loaded into the current configuration session. The
current configuration session is therefore populated with the contents of the file:
RP/0/RP1/CPU0:router(config)# load disk0:/usr/cisco/test.cfg
Loading.
77 bytes parsed in 1 sec (76)bytes/sec
Loading an Alternative Configuration at System Startup
When a router is reset or powered on, the last running configuration is loaded and used to operate the
router.
You can load an alternative configuration during system boot. See Cisco IOS XR ROM Monitor Guide
for information and instructions on this process.