| The main content of this paper consists of three aspects,such as,the deployment of IPv6 testbed,the applications of MP_BGP in the IPv6 network,analysis and visualization of the globe IPv6 BGP routing information. Therefore, several work carried on is as following:First,the testbed in ChangShu Institute of Technology is constructed,the routers of IPv6 testbed are all simulated with Linux and Zebra.The Interior Gateway Protocol of the testbed is OSPFv3,and the Exterior Gateway Protocol is MPBGP.Success of the testbed indicates that Linux and Zebra can provide good support to IPv6,this simulated routers are very economical and practical under the experimental condition.Secondly, MP_BGP connection between CERNET and ChangShu Institute of Technology is carried on.The AS Number of ChangShu Institute of Technology allocated by CERNET is 65035,and the AS Number of CERNET is 65001,the two AS's are connected with MP_BGP through the IPv6-in-IPv4 tunnel.A mass of BGP routing information is received from the backbone IPv6 BGP routing table on this platform. Therefore,analysis and visualization of the globe IPv6 BGP routing information is carried out. The analysic of the IPv6 routing information indicates that the globe IPv6 network is in its infancy period,and there are some anomalies in the IPv6 networks, such as the routing instability, large fractions of more-specific routes and the AS-Path inflation.It is observed that these anomalies result mainly from the instability of the long prefix.Last,this paper presents a 3D map of global IPv6 AS topology and a method to visualize the global IPv6 AS topology in 3D based on VRML.The connection between CERNET AS and the AS of ChangShu Institute of Technology is clear in the 3D AS topology map.Comparing with some AS-Pathes,some anomalies can be seen from the 3D map too.The study of this paper provides a model for the university in the IPv6 deployment, and the effective way in survey and managing IPv6 network. |
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