Site Multihoming and Provider-Independent Addressing using IPv6

D. Henrici, D. Prantl, and P. Müller (Germany)


Internet protocols, communication protocols, multi homing, Internet architecture, communication systems 1. Current Situation and Motivation Although the current IPv6 standard [1] was published in 1998, practical adaptation still proceeds slowly excepting in Asia where IP address space is scarce and thus the demand for IPv6


Using IPv6, multihoming and Internet service provider migration are still not satisfactorily solved problems. This leads to delay in the adaptation of the new protocol version. This contribution aims to address both of the two stated problems while retaining the advantages of strictly hierarchical addressing and routing. The solution presented in this paper consists of two building blocks: So called “Unique Local Addresses” that are intended to be used instead of the deprecated IPv6 site local addresses can be employed as globally valid, provider-independent identifiers. Using address mapping at site exit routers, a feature-rich multihoming solution can be created without breaking the end-to-end model. The proposed solution has many advantages: It is simple and compatible to current Internet standards. No changes at all are required at hosts, and the solution is designed to keep network management easy.

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