Analyzing and Modeling the IPv6 Internet AS-level Topology

After analyzing the topology data from CAIDA’s Scamper and our IPv6 topology discovery system Dolphin, we find that the IPv6 Internet is also scale-free at AS level but with a new feature: its exponent of the degree distribution is just 1.2, which is much smaller than that of the IPv4 Internet and those of most other scale-free networks. The value of 2 of the degree exponent is the lower bound for most scale-free networks. We argue that the degree exponent is a measure of uniformity of the degree distribution and try to seek the reason for the small degree exponent of the IPv6 Internet. Current evolving network models, however, have difficulties in reproducing such a small exponent. Then based on the two major factors affecting the exponent and the EBA model we propose a new model which has the capability to construct a scale-free network with the degree exponent smaller than 2. To verify the validity of this model, both theoretical and experimental analyses have been carried out. Finally, we demonstrate the effectiveness of this model by successfully reproducing the topology of the IPv6 Internet.

DOLPHIN: THE MEASUREMENT SYSTEM FOR THE NEXT GENERATION

With the growth of IPv6 research and application, thenext generation Internet was widely developed around theworld. The paper presents an IPv6 Internet measurementsystem named Dolphin, which performs the networkmeasurement work of IPv6 backbone. The paperintroduces the system realization and architecture ofDolphin system, and then analysis the data collection ofnext generation Internet.

Introduction of IPv6 Group of SKLSDE

The IPv6 Group is a part of the State Key Laboratory of Software Development Environment(SKLSDE) in BUAA, China.We took up with research on IPv6 backbone network topology discovery,modeling and analysis.
Dolphin is our IPv6 backbone network topology discovery system, based on asynchronous traceroute probe.With the help of Dolphin,we are able to obtain some topological information of the IPv6 backbone network.
Until 2008.9.23 22:00,we have found 624 ASes, 14563 routers and 101762 links.