Stateless Auto-configuration of IPv6 Site-local Addresses

Abstract

We propose a new framework for stateless auto-configuration of IPv6 site-local addresses with “zero configuration.” When a router is connected to a link as the first router, it becomes the link leader and generates an address prefix with randomly generated 16-bit subnet ID for the segment. In order to assure the uniqueness of the prefix addresses, we show a protocol, which is an extension of RIPng, for detecting prefixes conflicts. When a conflict is detected, it is notified to its segment leader immediately. The segment leader generates a new prefix and renumber to new one via IPv6 address renumbering scheme. And, exploiting the IPv6 feature that multiple addresses can coexist on an interface, we realize such a routing algorithm that can protect the connections using old addresses for a fixed time.