I was asked by a customer to take a Cisco 3750G and delete out the config and vlan information so that they could repurpose the switch for another area in the network. Even though I have done this a lot, I realized that there are a lot of people out there who dont know how to delete the vlan database out. And, to go with that, I have actually seen some Cisco documentation that is incorrect. Here is what you have to do to get this vlan data deleted off the switch:
First, I deleted my config information.
Switch#write erase
Erasing the nvram filesystem will remove all configuration files! Continue? [con
[OK]
Erase of nvram: complete
Next, I delete the vlan information that was recieved from VTP.
Switch#delete flash:/vlan.dat
Delete filename [vlan.dat]?
Delete flash:/vlan.dat? [confirm]
Verify.
Switch#dir flash:/
Directory of flash:/
3 -rwx 13006601 Mar 22 2012 16:09:48 +00:00 c3750-ipservicesk9-mz.122-
4 -rwx 1048 Mar 1 1993 00:08:14 +00:00 multiple-fs
6 -rwx 10570 Dec 14 2012 06:19:17 +00:00 config.old
32514048 bytes total (19493888 bytes free)
Switch#reload
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