In this article we will discuss VTP, will make brief discussion on VTP, last article we discuss about SMPP.

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. To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over 802.1Q, and ISL trunks.

VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products.

The purpose of VTP is to provide a way to manage Cisco switches as a single group for VLAN configuration purposes. For example, if VTP is enabled on Cisco switches, the creation of a new VLAN on one switch makes that VLAN available to all switches within the same VTP management domain.

The VTP Transparent mode is something between a VTP Server and a VTP Client but does not participate in the VTP Domain. In Transparent mode, you are able to create, modify and delete VLANs on the local switch, without affecting any other switches regardless of the mode they might be in.

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