基于6to4 Tunnel机制的跨域部署企业园区组网设计

Network Design of Enterprise Parks with Cross-domain Deployment Basedon 6to4 Tunnel Mechanism

为满足纯IPv4向纯IPv6网络过渡阶段的企业组网需求,文章在eNSP (Enterprise Network Simulation Platform)仿真平台下设计了一种基于6to4 Tunnel机制的跨域部署企业园区组网方案。在路由设备部署双出口,在电信网络通道部署6to4 Tunnel以用于IPv6单播流量传输,在联通网络通道部署MPLS/BGP VPN网络,以MD(Multicast Domains)方案部署IPv4组播业务。对出口的公网IPv4地址如何为本地网络申请IPv6前缀,对6in4数据包封装机制如何封装IPv6数据包,以及对MD方案中Share-Group组地址配置与MTI(Multicast Tunnel Interface)等配置过程进行了分析。仿真结果表明,组网实现了在过渡阶段利用6to4 Tunnel解决传播IPv6孤岛间流量的可行性,以及MD VPN传播组播IPv4流量的可靠性,能够较好地满足现阶段企业园区网络的建设需求。

To meet the requirements of enterprise networking during the transition from IPv4 to IPv6,a 6to4 tunnel based cross-domain enterprise park networking scheme is designed on the eNSP(Enterprise Network Simulation Platform).Dual egress on routing devices,6to4 tunnels on telecommunications network channels for IPv6 unicast traffic transmission,MPLS/BGP VPN networks on Unicom network channels and IPv4 multicast services using the MD(Multicast Domains)scheme are all deployed.This article analyzes how to apply IPv6 prefixes for local networks using public IPv4 addresses at the egress,how to encapsulate IPv6 packets by the 6in4 packet encapsulation mechanism,and how to configure Share-Group group addresses and Multicast Tunnel Interface(MTI)in the MD scheme.The simulation results show that networking realizes the feasibility of using 6to4 tunnel to solve the problem of propagating IPv6 inter island traffic during the transition phase,and the reliability of MD VPN propagating multicast IPv4 traffic.The designed networking can better meet the current needs of enterprise park network construction at the stage.