VLAN Trunking Protocol

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VTP redirects here, for the mathematical abbreviation see vector triple product
Example without and with VTP (Click to Play)

VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network.[1] To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over ISL, 802.1Q, IEEE 802.10 and LANE trunks. VTP is available on most of the Cisco Catalyst Family products. There are three versions of VTP, namely version 1, version 2, version 3.

The comparable IEEE standard in use by other manufacturers can be implemented with GVRP or the more recent MVRP.

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