How to reset VLAN and VTP to factory default settings ?

Hi guys, let's discuss on how to reset VLAN and VTP database to factory default settings. This example is made by using Cisco Catalyst 2950.

Steps

1. VLAN and VTP information are stored in vlan.dat file which is located in flash.
2. To display files in flash, enter the command dir flash: or show flash. You will see the file vlan.dat.

SwitchB#dir flash: Directory of flash:/     2  -rwx         660  Mar 01 1993 02:13:00 +00:00  vlan.dat     7  -rwx        2412  Mar 01 1993 05:11:18 +00:00  config.old     3  -rwx     3132319  Mar 01 1993 00:09:35 +00:00  c2950-i6q4l2-mz.121-22.EA14.bin     4  -rwx         840  Mar 01 1993 02:40:48 +00:00  config.text     5  -rwx         316  Mar 01 1993 00:12:13 +00:00  env_vars    21  -rwx         109  Mar 01 1993 00:05:00 +00:00  info    22  -rwx         109  Mar 01 1993 00:07:55 +00:00  info.ver     8  -rwx           5  Mar 01 1993 02:40:48 +00:00  private-config.text 7741440 bytes total (4600832 bytes free) SwitchB#show flash Directory of flash:/     2  -rwx         660  Mar 01 1993 02:13:00 +00:00  vlan.dat     7  -rwx        2412  Mar 01 1993 05:11:18 +00:00  config.old     3  -rwx     3132319  Mar 01 1993 00:09:35 +00:00  c2950-i6q4l2-mz.121-22.EA14.bin     4  -rwx         840  Mar 01 1993 02:40:48 +00:00  config.text     5  -rwx         316  Mar 01 1993 00:12:13 +00:00  env_vars    21  -rwx         109  Mar 01 1993 00:05:00 +00:00  info    22  -rwx         109  Mar 01 1993 00:07:55 +00:00  info.ver     8  -rwx           5  Mar 01 1993 02:40:48 +00:00  private-config.text 7741440 bytes total (4600832 bytes free)

4. Delete the file by following below command.

SwitchB#delete flash:/vlan.dat Delete filename [vlan.dat]? Delete flash:/vlan.dat? [confirm]

5. Reload the switch by entering below command.

SwitchB#reload Proceed with reload? [confirm]

6. After reload, the VLAN and VTP data will be set to default settings.

SwitchB#sh vlan VLAN Name                             Status    Ports ---- -------------------------------- --------- ------------------------------- 1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4                                                 Fa0/5, Fa0/6, Fa0/7, Fa0/9                                                 Fa0/10, Fa0/11, Fa0/12 1002 fddi-default                     act/unsup 1003 token-ring-default               act/unsup 1004 fddinet-default                  act/unsup 1005 trnet-default                    act/unsup VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1    enet  100001     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 ------- --------- ----------------- ------------------------------------------ SwitchB#sh vtp status VTP Version                     : 2 Configuration Revision          : 0 Maximum VLANs supported locally : 128 Number of existing VLANs        : 5 VTP Operating Mode              : Server VTP Domain Name                 : VTP Pruning Mode                : Disabled VTP V2 Mode                     : Disabled VTP Traps Generation            : Disabled MD5 digest                      : 0x3F 0x17 0xC8 0xB8 0x5A 0xE3 0x01 0x66 Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00

I hope this post will benefit you guys. Thank you for dropping by.

- Soulpower