Re: VTP Ver 2 and VTP Ver 3? VTP Password encript?
Regarding the differences between VTPv2 and VTPv3, there are many. I suggest reading the article referenced below. It covers the differences very nicely although it is concerned with CatOS, not IOS. The Configuration Guides for your current version of software on your switches will provide you with ample guidance as to how shall the VTPv3 be configured on your devices.
To sum the differences briefly, the VTPv3 is able to distribute information about extended range VLANs, private VLANs, provides protection against unwanted overwriting of the VLAN database by a switch with a higher revision number, and is even able to synchronize MSTP region configuration throughout your VTP domain.
The VTP password can be, to my best knowledge, encrypted only for VTPv3 using the command vtp password passwordhidden in the global configuration mode. After entering this command, the password will be stored in an encrypted format in the vlan.dat file and even the show vtp password command will be unable to reveal the original plaintext version.
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