As currently specified by the IETF, ipv6 address assignment policy is planned to be strictly along topological lines. While this approach offers a high degree of routing aggregation, the fact that topology is determined by ISPs means that addresses assigned in this manner will not be portable, severely constraining end customer choice. In reaction to this, the various RIRs are proposing non-topological, or "provider independant" address assignment. Unfortunately, without changes to the ipv6 protocol to implement a scalable routing and addressing architecture, principally by de-coupling the "locator" and "endpoint id" properties of addresses, such a change is likely to result in the creation of a new, substantially large "routing swamp" that could eventually cause global routing state explosion, stability, and convergence issues. This fundamental flaw in ipv6 badly needs to be resolved if it is to succeed in widespread deployment.

About the Presenter
Vince Fuller has been involved in global Internet operations, engineering, and architecture for 18 years, having worked for a series of local, regional, national, and international ISPs from 1988 through 2001. Most recently, he has been employed by Cisco Systems as a technical consultant to service provider customers, focusing on scaling issues of very large IP networks.

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