How to realize communication between different VLAN and different network through the VTP technology of Switch

Three-layer switching technology is two-layer switching technology and three-layer routing forwarding technology, the traditional exchange technology in the data link layer to operate, three-layer switching technology is the network layer to implement high-speed packet forwarding. The third layer switching technology can realize the function of network routing, and the optimal network performance according to different network conditions. The most important purpose of the three-tier switch is to increase data exchange within a large LAN, and can not replace the work of the router, in the same LAN in the interconnection of each subnet and VLAN in the LAN routing, using a three-tier switch to replace the router, and only the LAN and the public network between the Internet to achieve across the geographical network access , only through professional routers.

Understand the three-tier exchange technology, we are the following through the switch VTP technology to achieve different VLAN, network communication, the reason why the use of VTP technology is greatly reduced our management of VLANs, can easily add, remove and adjust the network VLAN configuration to achieve a systematic management.

When more than one VLAN is divided on the three-layer switch, and each VLAN uses the IP address of different network segment, to realize all the computers under the switch to communicate with each other, the interface IP of each VLAN must be set up, and all the computers should set the gateway, the gateway is the IP address of the VLAN interface The following figure: three-layer switch topology diagram:

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Case Requirements Analysis: Set the core switch to VTP server, and create VLAN 10, VLAN 20. Set the access layer switch to VTP client, enable them to implement VLAN relay, configure the switch interconnect port as the trunk type, and plan the VLAN port allocation of the switch to realize the communication between different VLAN and different network segments.

The port mode of the switch is mainly divided into acess type and trunk type. By default, the switch port mode is the access type, this type of port can only be subordinate to a VLAN, usually used to connect to the computer, and the trunk type of port can allow multiple VLAN traffic, commonly used for switch interconnection. The following figure:

1. Core Switch Configuration command

2, Access layer switch SB configuration command