How To Reset VLAN Network In A Cisco Switch

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if you followed us on the previous page of this tutorial, we showed you about How To Reset Cisco Switch To Factory Defaults on this page we are going to show you the next step, which is to reset your VLAM config to the factory default.

To reset the VLAN information to the factory defaults, all you have to do is delete the vlan.dat file from the Flash or NVRAM and reload the switch, This post is for the purpose of showing you about resetting your VLAN configuration in your cisco catalyst switch. we are going to be using a cisco 2950 for this lab. to change the configurations of the switch, we will need to connect to the switch through the console terminal.

once you have connected a computer to the console terminal on your switch use this command:

1. Enable Mode:
COMMAND:
NOTE: you may have to enter the enable password

2. Show current VLAN Configurations in your switch:
COMMAND:

###############

VLAN Name                             Status    Ports##########                                           
---- -------------------------------- --------- -------------------------------#########                                                   

File "flash:/c295
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4                                                                    
oint:
                                                Fa0/21, Fa0/22, Fa0/23, Fa0/24
2    VLAN0002                         active
1002 fddi-default                     active
1003 token-ring-default               active
1004 fddinet-default                  active
1005 trnet-default                    active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        0      0
2    enet  100002     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      -      -        -    -        0      0
1003 tr    101003     1500  -      -      -        -    -        0      0
1004 fdnet 101004     1500  -      -      -        ieee -        0      0
1005 trnet 101005     1500  -      -      -        ibm  -        0      0

Remote SPAN VLANs
------------------------------------------------------------------------------


Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------

3. Display the files contain in the flas directory:
COMMAND:

Directory of flash:/

    2  -rwx     2888547   Mar 01 1993 00:03:35  c2950-i6q4l2-mz.121-13.EA1.bin
    3  -rwx         269   Jan 01 1970 00:03:58  env_vars
    7  drwx         832   Mar 01 1993 00:04:31  html
   21  -rwx         109   Mar 01 1993 00:04:33  info
   22  -rwx         109   Mar 01 1993 00:04:33  info.ver
   23  -rwx         616   Mar 01 1993 02:09:46  vlan.dat

7741440 bytes total (2870272 bytes free)

if you look at the output information, you will see a file called: vlan.dat this is the file we need to delete

4. Display the files contain in the flas directory:
COMMAND:



5. show the files contain in the flash directory again, you should not see the vlan.dat file anymore:
COMMAND:

5. reload the switch:
COMMAND:

5. save the changes:
COMMAND:

5. now that you have reset your flash defaults and VLAN, you can configure yout switch:
COMMAND:

thats it, now you can configure your switch:

if you need more information you can visit cisco: //www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a00800c4546.shtml