A brief analysis of the construction mode of IPV6 Campus network

1. Foreword

The next Generation Internet demonstration Project Cngi (China next Generation Internet) is led by the National Development and Reform Commission, jointly sponsored by the Ministry of Information Industry, the Ministry of Science and Technology, the Chinese Academy of Engineering, the National Natural Science Foundation of China, the Ministry of Education and other 8 major ministries. Cngi Core network Construction goal is through the large-scale IPV6 network construction deployment implementation and the commercial exploration, in the next few years, China will become IPv6 the next generation network domain leading country. Cernet2 from the 2004, the steady operation of the backbone network has laid the foundation for the next application test, which provides a platform of interconnection based on IPV6 technology for more schools, which makes each school have the prerequisite of research in ngi field.

Therefore, the education IPV6 CPN network will be the focus of the current construction. The Resident Network (CPN) refers to the internal network of the Access Unit, which refers to the network equipment contained between the user terminal and the network operator (ISP) Access node, which consists of the user's resident wiring system which completes the communication and control function. This article will be around in the current station network (Campus network) How to build a IPV6 network platform, from the construction model will be several types, each type of characteristics suitable for what kind of environment for detailed elaboration, hope to be able to communicate with you to discuss. Due to the reasons for the length of the other CPN construction points are not analyzed.

2. Education IPV6 CPN-building model

2.1 Full Double Stack mode

Topology Brief:

All the three-tier equipment of the station network is IPV4/V6 double stack equipment. In order to realize IPV6 station Network, add 1 IPv6 export router. The IPV6 export router connects the original dual-stack core switch via GE link.

Implementation principle:

The deployment of a dual-protocol stack network in the Resident Network (Campus network) is the ideal method, as shown in the figure. Among them IPV4 network part and the original campus network IPV4 partial fusion. This allows two-stack users to access both the IPV6 and IPV4 networks in a new resident network (Campus network). For dual-stack terminals, both the IPv4 gateway and the IPv6 gateway are deployed on the converged 3-tier switch. All three-tier equipment in the station network is a dual-stack device, running IPV4 routing protocol and running IPV6 routing protocol. The data forwarding paths for different protocols may be consistent or different.

Advantages of double Stack mode:

From a technical point of view, this is the ideal solution, without having to deploy a network configuration for different types of users, with little overhead, simple management, and a clear logical interface between IPV4 and IPV6.

Dual stack Mode disadvantage:

As the original network of the station network is actually IPV4 network, to build a full double stack network, the original network equipment must be eliminated, investment is too large, and there are different degrees of waste of equipment resources. In fact, this model is only suitable for the new network, not for all situations.