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What is the effect of using the ‘Router# copy running-config startup-config’ command on a router?

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If you’re managing a router, particularly one running Cisco IOS, you may have come across the command “Router# copy running-config startup-config.” This command is an essential part of router administration, as it plays a crucial role in preserving your router’s configuration settings.

In this article, we will discuss the effects of using this command and why it’s important for maintaining the stability of your network.

Effect of the “Router# copy running-config startup-config” Command

When configuring a router, changes you make are initially saved to the running configuration, which is stored in the device’s RAM (Random Access Memory). The running configuration is the active set of configuration settings that the router uses while it is powered on. However, the data stored in RAM is volatile, meaning that it will be lost when the router is powered off or restarted.

To prevent losing your configuration changes during a reboot, you can use the “Router# copy running-config startup-config” command.

This command copies the current running configuration to the startup configuration, which is stored in the router’s NVRAM (Non-Volatile RAM). NVRAM retains data even when the router is powered off or restarted.

By using this command, you’re ensuring that any changes you’ve made to the router’s configuration settings will persist after a reboot. When the router is powered on again, it will load the configuration settings stored in the startup configuration, effectively preserving your custom settings.

Importance of the “Router# copy running-config startup-config” Command

Using the “Router# copy running-config startup-config” command is essential for several reasons:

  • Configuration Persistence: As mentioned earlier, it ensures that your configuration changes are retained when the router is rebooted. This is particularly important when making critical changes to your network, such as adjusting access control lists, routing protocols, or security settings.
  • Network Stability: By preserving your configuration settings, you maintain the stability of your network. This is especially important in a production environment, where sudden changes or loss of settings can lead to network disruptions and downtime.
  • Backup and Recovery: The command allows you to create a backup of your current configuration, which can be useful when troubleshooting or rolling back to a previous configuration state. In the event of a hardware failure or configuration error, you can quickly restore the router to its previous working state by reloading the startup configuration.

The “Router# copy running-config startup-config” command is an essential tool for router administrators, ensuring that configuration changes are preserved and providing a level of stability and reliability for your network. By understanding the effects of using this command, you can maintain a secure and stable network environment, minimise the risk of downtime, and streamline the router management process.

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CT Editorial Team