How to reset a Cisco router to mill default (removing the startup configuration file)

reset restart
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To reset a Cisco router to factory default (removing the startup configuration file), perform these steps:

1.To erase the configuration file, issue the erase nvram: control. Reload the router by issuing the reload command.

2.If this does non solve the problem, attempt to interruption into ROM Monitor (ROMmon) by issuing the suspension sequence (usually Ctrl and break from the Hyperterminal) from a console connection.

Refer to: Cisco Standard Intermission Primal Combinations. You should see this ROMmon prompt:

rommon 1>

3.Change the configure annals value to ignore the startup configuration past issuing the confreg command, as shown in this example:

rommon ii> confreg 0x2142

4.To reload the router, issue the reset command, as shown in this example:

rommon 3> reset

5.After the router boots, issue the enable command at the Router > prompt. The prompt changes to Router#, indicating that the router is at present in privileged style.

half dozen.To enter config way, issue the config final control. You should at present see a Router(config)# prompt.

7.To change the configure annals to recognize the startup configuration, event the config-annals command, as shown in this example:

Router (config)# config-register 0x2102

To break out of configuration mode, press Cntl and Z. To relieve the bare configuration, issue the copy-running config-startup config command.

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