How to Erase a Configuration on a Switch

How to Erase a Configuration on a Switch

Step 1:

  • Firstly note that this will wipe the configuration off the switch, do not do this in a production network unless you intentionally want to do this.
  • Type the below command this will erase the configuration from the non-volatile memory (nvram)
  • Type reload and enter
    Type the Below:
    enable, enter
    write erase, enter
    reload, enter

Step 2:

  • You will be prompted to save configuration

Step 3:

  • Confirm by hitting enter

Step 4:

  • Once the Switch has rebooted run the command show vlan, you will note that the vlan configurations are still there, that is because they are stored in the flash memory in the vlan.dat file
  • There are two ways to remove it

Step 5:

  • First way to delete vlans
    Type the following:
    enable, enter
    Configure terminal, enter
    no vlan 10, enter
    exit, enter
    show vlan , enter

Step 6:

  • Second Way, Locate the the Vlan.dat file in the directory

Step 7:

  • Remove file
  • Reload Switch
    Type the following:
    enable, enter
    delete vlan.dat, enter
    enter

Step 8:

  • Confirm removal by running show vlan command
    Type the below:
    enable, enter
    Show vlan, enter