Configuration File Overview - 3Com 4510G Configuration Manual

Saving the Current Configuration
Setting Configuration Rollback
Specifying a Startup Configuration File for the Next System Startup
Backing Up the Startup Configuration File
Deleting the Startup Configuration File for the Next Startup
Restoring the Startup Configuration File
Displaying and Maintaining Device Configuration

Configuration File Overview

A configuration file saves the device configurations in command lines in text format. You can view
configuration information conveniently through configuration files.
Types of configuration
The configuration of a device falls into two types:
Startup configuration, a configuration file used for initialization when the device boots. If this file
does not exist, the system boots using null configuration, that is, using the default parameters.
Current configuration, which refers to the currently running configuration of the system. The
current configuration may include the startup configuration if the startup configuration is not
modified during system operation, and it also includes the new configuration added during the
system operation. The current configuration is stored in the temporary storage medium of the
device, and will be removed when the device reboots if not saved.
Format of a configuration file
A configuration file is saved as a text file. It:
Saves configuration in the form of commands.
Saves only non-default configuration settings.
Lists commands in sections by views, usually in the order of system view, interface view, and
routing protocol view. Sections are separated with one or multiple blank lines or comment lines
that start with a pound sign #.
Ends with a return.
Coexistence of multiple configuration files
Multiple configuration files can be stored on a storage medium of a device. You can save the
configuration used in different environments as different configuration files. In this case, when the
device moves between these networking environments, you just need to specify the corresponding
configuration file as the startup configuration file for the next boot of the device and restart the device,
so that the device can adapt to the network rapidly, saving the configuration workload.
A device boots using only one configuration file. However, you can specify two startup configuration
files, main and backup startup configuration file, for the next startup of the device as needed and when
the device supports this feature. When the device boots, the system uses the main startup
configuration file, and if the main startup configuration file is corrupted or lost, the system will use the
backup startup configuration file for device boot and configuration. The devices supporting the
configuration of the main and backup startup configuration files, compared with the devices that do not
support this feature, are more secure and reliable.
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