VLAN Trunking Protocol (VTP)
Cisco created this one too. The basic goals of VLAN Trunking Protocol (VTP) are to manage all configured VLANs across a switched internetwork and to maintain consistency throughout that network. VTP allows you to add, delete, and rename VLANs—information that is then propagated to all other switches in the VTP domain.
Here’s a list of some of the cool features VTP has to offer:
Very nice, but before you can get VTP to manage your VLANs ...