The VLAN Trunk Protocol (VTP) is the Cisco Layer 2 information transfer protocol, which mainly controls the addition, deletion, and rename of VLANS within the network. VTP reduces the management transaction in the exchange network. When a user is to configure a new VLAN for a VTP server, you can allocate VLAN through all switches in the domain, which avoids the same VLAN everywhere. VTP is the Cisco Private Agreement that supports most Cisco Catalyst series products.
Through VTP, all switches in its domain know all VLANs, but when VTP can establish excess flow, the case exceptions. At this time, all unknown unicasts and broadcasts are spread throughout the VLAN, allowing all switches in the network to receive all broadcasts, even if the user is not connected in the VLAN, the situation is no exception. The VTP pruning technology is eliminating the extra flow.
In the default mode, all Cisco Catalyst switches are configured as a VTP server. This situation is suitable for small networks with small VLAN information and is easy to store on any switch (NVRAM). For large networks, since each switch will perform NVRAM storage operation, this action is redundant for some point, so a "Judgment Call) must be set at these points. Based on this, the VTP server used by the network administrator should adopt a good switch, and other switches are used as clients. It is also necessary to have some of the VTP servers to provide a certain amount of redundancy required to network. For more information, please visit the following page: 中文 版: http://www.networkDictionary.com/Chinese/protocols/vtp.php English version: http://www.networkDictionary.com/protocols/vtp.php
