To specify the device and filename of the configuration file from which the router configures itself during initialization (startup), use the boot config global configuration command. This command is only available on Class A file system platforms. Use the no form of this command to remove the specification.
boot config file-url
no boot config
file-url URL of the configuration file. The configuration file must be an ASCII file located in either NVRAM or a Flash file system.
NVRAM (nvram: )
Global configuration
| Release | Modification | 11.0 | This command was introduced. |
|---|
This command is only available on Class A file system platforms.
You set the CONFIG_FILE environment variable in the current running memory when you use the boot config command. This variable specifies the configuration file used for initialization (startup).
When you use this global configuration command, you affect only the running configuration. You must save the environment variable setting to your startup configuration to place the information under ROM monitor control and to have the environment variable function as expected. Use the copy system:running-confignvram:startup-config command to save the environment variable from your running configuration to your startup configuration.
The software displays an error message and does not update the CONFIG_FILE environment variable in the following situations:
The router uses the NVRAM configuration during initialization when the CONFIG_FILE environment variable does not exist or when it is null (such as at first-time startup). If the software detects a problem with NVRAM or the configuration it contains, the device enters setup mode. Refer to the "Setup Command" chapter in this publication for more information on the setup command facility.
When you use the no form of this command, the router returns to using the NVRAM configuration as the startup configuration.
In the following example, the first line specifies that the router should use the configuration file router-config located in internal Flash memory to configure itself during initialization. The second line copies the specification to the startup configuration, ensuring that this specification will take effect upon the next reload:
Router (config)# boot config flash:router-config Router (config)# end Router# copy system:running-config nvram:startup-config
The following example instructs a Cisco 7500 series router to use the configuration file router-config located on the Flash memory card inserted in the second PCMCIA slot of the RSP card during initialization. The second line copies the specification to the startup configuration, ensuring that this specification will take effect upon the next reload:
Router (config)# boot config slot1:router-config Router (config)# end Router# copy system:running-config nvram:startup-config
| Command | Description |
|---|---|
| show bootvar | Displays the contents of the BOOT environment variable, the name of the configuration file pointed to by the CONFIG_FILE environment variable, the contents of the BOOTLDR environment variable, and the configuration register setting. |
Printed for apswan@ctr.ap.nic.in on Wed Mar 5 22:32:57 PST 2003
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