Design And Simulation Of Enterprise Park Network With IPv4/IPv6 Dual Protocol Stack

With the rapid evolution of the Internet,new Internet resources have been accessed,and more IP addresses have to be used.IPv4 addresses of mainstream network layer protocols tend to be exhausted,global unicast IP address resources are scarce,and the corresponding next-generation network protocol IPv6 is gradually applied.Although the future enterprise network will accomplish the transition and conversion to the IPv6 network,IPv6 cannot directly replace IPv4 at this stage.For a long time,applications still need to be compatible with IPv4 and IPv6 as a transition technology.In the enterprise network environment,with the goal of maximizing the protection of enterprise investment,the existing IPv4-based protocols and applications would be retained,to broaden and support IPv6 on this basis,making the enterprise network can also seamlessly access IPv6.According to the current planning and future development needs of enterprise,this thesis analyzes and discusses the enterprise network from the following five aspects:introduction of relevant protocols and technologies,requirement analysis of enterprise park network construction,the analysis and design solution of the park network construction with dual protocol stack,simulation implementation,testing and verification of the solution.In order to provide solutions in the environment of IPv4 and IPv6 coexistence,this thesis discusses the dual protocol stack technology based on IPv4/IPv6.In the design and implementation of the enterprise network,the low-layer protocol is first established to build the network framework,including Layer 2 network technologies such as VLAN,link aggregation,and MSTP.Secondly,those technologies based on IPv4 protocol such as the VLSM subnet,NAT,VRRP are mainly implemented in the enterprise network.Finally,the implementation of enabling IPv6 on client hosts/servers,Layer 3 switches,and routers and successfully communicating with external IPv6 networks will be realized.This project uses the eNSP simulation software based on Windows system to design and simulate the enterprise network environment.This thesis introduces the concrete implementation of the enterprise network conventional technology in the IPv4/IPv6 coexistence environment,and provides a practical and feasible reference network for the general enterprise to reserve IPv4 and access IPv6.