Erasing configuration files

In certain scenarion you might want to remove the existion configuration of an Cisco IOS device and restore the device to the factory settings. To do this, you will need to access the device over the network or through the console and issue one of the following commands (not all commands are supported on all Cisco devices):

  • write erase
  • erase nvram:
  • erase startup-config


Once you execute one of the commands above, you will need to reload the device. Here is an example:

R1#write erase
Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
Erase of nvram: complete
%SYS-7-NV_BLOCK_INIT: Initialized the geometry of nvram
Proceed with reload? [confirm]

Prerequisites for 200-301

200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, and even some programming concepts. As with other Cisco certifications, you can take it at any of the Pearson VUE certification centers.

The recommended training program that can be taken at a Cisco academy is called Implementing and Administering Cisco Solutions (CCNA). The successful completion of a training course will get you a training badge.

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