How to design the network system integration scheme? We need to follow the four principles mentioned above and design the network system integration scheme as follows:

1. Overall design

The enterprise network system integration structure can be built by using star structure. The switch is used as the network central node to establish the network architecture of core layer and access layer. The two switches are used to improve the enterprise network access speed and user management by using double link aggregation technology. In the enterprise network system integration scheme, a dual web and FTP server is built for the enterprise. The web server provides network resource access, and the FTP server provides information and data transmission.

In addition, when planning the integrated VLAN of the enterprise network system, it is necessary to divide multiple VLAN segments according to the enterprise department and correspond to the IP number segment to facilitate the distribution and management of network packets.

2. Network design and Implementation
The following takes the large enterprise network (500 computer capacity) as an example for network design and implementation.

(1) IP and port division and allocation
IP address planning is to distinguish the client machines within the enterprise and facilitate the administrator to manage different clients. The IP address can be divided into 192.0.0.0 ~ 223.255.255.255, and the standard subnet mask is 255.255.255.0. For large enterprise (more than 500) networks, a standard IP number segment cannot meet the application requirements. Therefore, CIDR theory can be used to establish multi segment IP for management, such as 192.168.10.0/24, 192.168.20.0/24, 192.168.30.0/24 and 192.168.40.0/24.

(2) Switch and router configuration
SW1 core switch is connected with 1000mb / s optical fiber jumper, and FTP server (IP: 92.168.0.0 / 24) and web server (IP: 92.168.1.0 / 24) are built, in which the administrator can manage the switch; SW2 modular convergence switch connects the router with 100MB / s network jumper horizontal wiring, so that the computers of various departments can connect to the Internet at 100MB / s network speed.

(3) Wireless configuration
VLAN technology can be used to divide the wireless user use area, and SSID can be configured for the wireless AP. For wireless configuration, WPA2 encryption management can be set by using web encryption technology at the router end, and the IP use range can be set.

3. Server design and Implementation
(1) DNS server
DNS domain name system can establish a hierarchical network service naming system. In enterprise LAN, users can locate computers by naming, which is convenient for data sharing. In addition, the domain name in the LAN can be resolved into IP address, the DNS server can be configured, and the mapping table between domain name and IP can be established. For example, ftp.xxx.com mapping IP: 92.168.0.0/24.

(2) Web server
Build a web server with Windows system and use IIS information service for management and maintenance. Building steps: open IIS manager, find the "website" option on the side bar, right-click "new website", and then complete the building according to the creation wizard.

(3) FTP server
FTP server is a network space for enterprise data upload and download. On FTP server, enterprise employees can upload their personal working files to the server for sharing. To build an FTP server, you need to establish an FTP site in the Internet information server (IIS) manager, add upload and download users, configure folder permissions for the storage space in the server, and specify user operation permissions.

4. Network computer room planning
The main function of the network room is to manage the overall network application of the enterprise, distribute network packets in different functional areas, and manage the security of enterprise network application. In the network room design of the network system integration scheme, the standard cabinet can be taken as the construction object, and the hardware such as switches, routers and firewalls can be uniformly installed in a large vertical standard cabinet to facilitate the unified management of network equipment. In the cabinet layout of enterprise network machine room, the generic cabling cabinet, network cabinet and server cabinet are standardized according to the management level. The generic cabling cabinet is placed adjacent to the network cabinet, so as to facilitate line adjustment operation and control the distribution of network users. In addition, a certain space shall be reserved for each cabinet during equipment installation to facilitate equipment upgrading and expansion in the later stage.