Reset a Cisco Router to Factory Default Settings Document ID: 46509 Introduction Prerequisites Requirements Components Used Conventions Instructions to Reset a Cisco Router … … Back to Factory Defaults Method 1 Method 2 Verify Related Information Introduction This document explains how to restore a Cisco router to its original factory default settings. Prerequisites Requirements In order to perform the procedures described in this document, you must have “enable” (also known as”privileged EXEC”) access on the …

Reset a Cisco Router to Factory Default Settings Document ID: 46509 Introduction Prerequisites Requirements Components Used Conventions Instructions to Reset a Cisco Router Back to Factory Defaults Method 1 Method 2 Verify Related Information Introduction This document explains how to restore a Cisco router to its original factory default settings. Prerequisites Requirements In order to perform the procedures described in this document, you must have “enable” (also known as “privileged EXEC”) access on the router command line interface. Components Used This document is not restricted to specific software and hardware versions. The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command. Conventions For more information on document conventions, refer to the Cisco Technical Tips Conventions. Instructions to Reset a Cisco Router Back to Factory Defaults There are two main methods to return a Cisco router to its original factory defaults. These two methods are described below. Method 1 This method uses the config-register 0×2102 command in global configuration mode. Check the configuration register on the router by issuing the show version command. The configuration register setting is displayed in the last line of the show version command output, and should be set to 0×2102. If this is not the case, enter the config-register 0×2102 command once in global configuration mode. router# configure terminal router(config)# config-register 0×2102 router(config)# end router# If the show version command is issued again, the same line in the command output will have ‘(will be 0×2102 at next reload)’ appended to the current register setting. Erase the current start-up configuration on the router with the write erase command. 2. Reload the router with the reload command. When prompted to save the configuration, DO NOT save. router#reload System configuration has been modified. Save? [yes/no]: n Proceed with reload? [confirm] 3. Once the router reloads, the user will be presented with a ‘System Configuration Dialog’ as shown below. The router is now reset back to the original factory defaults. — System Configuration Dialog — Would you like to enter the initial configuration dialog? [yes/no]: 4. Method 2 This method uses the config-register 0×2142 command in global configuration mode. Enter the config-register 0×2142 command in global configuration mode. router(config)# config-register 0×2142 This causes the router to ignore the start-up configuration on the next reload. If a show version is issued, the last line in the command output will have ‘(will be 0×2142 at next reload)’ appended to the current configuration register setting. 1. Reload the router using the reload command in enable mode. It is not necessary to save when prompted to save the system configuration. router#reload System configuration has been modified. Save? [yes/no]: n Proceed with reload? [confirm] 2. After the router has reloaded, the user will be presented with the ‘System Configuration Dialog’. Enter no to the question ‘Would you like to enter initial configuration dialog?’ 3. Change the configuration register setting to 0×2102 by entering the config-register 0×2102 command once in global configuration mode.

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