Designing And Implementation Of Enterprise Network Of JH Company

With the rapid development of computer and network technology, techniques of networkdesign are continuously updated; the requirements for the network from the enterprise havechanged so much. This paper is a major institution-building the JH enterprise network as thebackground, introducing the integral design of network system, the system of detailed designand implementation process. In the first place, it briefly introduces current situation ofEnterprise and Industrial control network; Secondly, with requirement analysis of the JHenterprise network so as to formulate network design principles. The research of this papertakes the network simulation software-OPNET as a technical support, if do then analyze andthen shows the result of the simulation; give the way to better it, and design of JH enterprisestructure of the network. The main context of this paper as the following:(1) According to actual situation, the disign scheme of JH Company is analyzed withOPNET network simulation software. The simulation results, as to the server response speedand the network delay under multi-level network and three-stage network environment , showthat the control exchange series can effectively reduce the system delay and improve theperformance of the network topology structure, three-stage swap meet the design of theenterprise nets JH; After comparing the advantages and disadvantages of the ring, star, treetopology structure in the networking, tree structure is adopted for JH main part and starstructure is used for subnet ; with simulation of link medium, ten thousand ethernettransmission link medium is selected for the core layer, the access layer link choose 100M.(2) According to the simulation results, the logic of the enterprise nets JH network,physical network, network application have been designed, including the core layer,aggregation layer and the access layer design; redundancy network, security design; networkmanagement design and so on. Using the advanced technologies such as network gate withphysical isolation, intranet network and internet network are effectively isolated and the safetyof network is improved; JH network using Quidview network management system capable oftimely and effective management network and user status.(3) JH industrial control network is part of the network production company. Accordingto requirement analys and industrial control network topology ,it mainly uses the Siemensindustrial communication network technology to realize real-time monitoring of operationcondition for all the rolling mills ,remote running status control , basic data collection andinformation exchange with upper net management, basic data statistic, cost calculation,manufacturing technology control , producing group and so on. Using the network gate with physical isolation, intranet network and industrial control network are effectively isolated andthe safety of industrial control network is improved.(4) It is time to select equipment after designing JH company network topology,including core layer, aggregation layer and the access layer switches selection; on routers,firewalls and server selection.