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Manual Chapter: The BIG-IP System Configuration State
Manual Chapter
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When you perform configuration tasks on the BIG-IP® system, the system generates underlying configuration data. The system must store this data so that the data is not lost when an unexpected system event occurs, or you restart the system. Before the system can store this data, however, the data must be saved.
More specifically, the BIG-IP system configuration data exists in two different states: the stored configuration and the running configuration:
The stored configuration comprises all of the configuration tasks that you have performed on the system and saved to the system configuration files.
The running configuration comprises the stored configuration and all of the changes that you have made to the system since the last save operation. The BIG-IP system operates based on the running configuration.
Configuration utility
If you are using the browser-based BIG-IP Configuration utility, the utility automatically saves the configuration data for you as you complete each configuration task; you do not need to perform any additional steps to save configuration data. For this reason, this chapter serves primarily as background information and is not required for you to configure the system successfully.
tmsh
If you are using this command line tool to configure the system, you must explicitly issue a save command to store the configuration data you have generated. Otherwise, the newly-generated configuration data is not actually stored on the system.
The command tmsh sys save [base-config | config] writes the running configuration to the stored configuration files. This ensures that recent configuration changes are retained.
Warning: If multiple users are making changes to the system, and one user runs the command sequence tmsh sys save config, the system saves the changes made by all of the users.
Important: Only users assigned the Administrator or Resource Administrator user role can run the command sequence tmsh sys save config. Users assigned other roles receive an error when they run these commands.
The command tmsh sys load [base-config | config] resets the running configuration with the values that are contained in the stored configuration.
Therefore, when you are modifying the system configuration, if you run any of the load commands before you save your changes to the stored configuration, the changes are lost. Similarly, if you restart the system before saving any recent changes, the changes are lost, because restarting the system utilizes the stored configuration.
The BIG-IP system has numerous stored configuration files. You can make changes to the BIG-IP system by configuring these files. While some of these files can actually be configured manually by editing the files directly, other files require you to use the tmsh command to make changes to the files.
Note: The objects in these files reside in partition Common. Consequently, the objects have limited protection by partition access control.
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