Network management skills: how to clear internal data before removing Cisco devices?

This document describes how to clear internal data for Cisco users. What are the specific operation steps? This article gives you a detailed description of the operation process. I believe this article will help you.

In the article "do not send company secrets when processing old devices, I introduced how to prevent confidential company information from being leaked due to negligence, but this best solution does not only need to be applied to hard drive, but you must also take measures, clear data from all network devices sold or donated by routers to ensure that company secrets are not leaked as the devices leave.

For network devices, clearing configuration information is the best way to prevent hackers from easily accessing the company's network. Let's take a look at how to clean up routers and switches to achieve this.

Clean up vro configurations

When cleaning a Cisco router, there are two different methods available for selection. Most network administrators are familiar with these two methods, which are usually used in different aspects.

The first method is to set the parameter of the configuration register to 0x2142. Most network administrators use this method to restore the password, but note that while restoring the password, all configuration information is cleared.

The process is as follows:

1. log on to the vro and enter the enbale command to start superuser mode. In this mode, enter the enable password command.

2. Enter the configure terminal command to start the global configuration mode.

3. Enter the config-register 0x2142 command (this operation will cause the router to ignore the startup configuration at the next restart time)

4. Enter the end command and enter the reload command in vro# # prompt mode to restart the vro.

5. At this time, the system will ask whether to save the configuration information and enter no, and confirm it at the next restart.

6. After the vro is restarted, the system will ask if you want to load the initial configuration dialog box and enter no

7. Enter the enbale command to set the parameter of the configuration register to 0x2142, use the configure terminal command to return to the global configuration mode, and enter the config-register 0x2142 command.

8. Enter the end command and the write memory command to overwrite the existing STARTUP configuration with the currently running blank configuration.

9. Enter the reload command to restart the router and complete the cleaning process.

However, if you already know the vro password, you can use the second method as follows:

1. log on to the vro and enter the enbale command to start superuser mode. In this mode, enter the enable password command.

2. Enter the configure terminal command to start the global configuration mode.

3. Enter the config-register 0x2142 command.

4. Enter the end command and the write erase command to delete the current STARTUP configuration of the vro.

5. Enter the reload command to restart the router. When the system asks whether to save the configuration, select no.

After the vro is restarted, all parameters will be restored to the default settings at the factory.