The Paths towards IPv6 Multihoming
Cédric de Launois, Marcelo Bagnulo
Multihoming, the practice of connecting to multiple providers, is becoming
highly popular. Due to the growth of the BGP routing tables in the Internet,
the way to get multihomed in IPv6 is required to allow route aggregation in
order to preserve the scalability of the interdomain routing system.
After several years of development, the IETF and the research community
propose drastic changes in how site multihoming shall be achieved in IPv6.
Those changes will potentially affect the fundamental multihoming mechanism,
as well as intradomain routing, traffic engineering and even the behaviour
of hosts within the multihomed site. This paper presents the required
functionalities and the constraints imposed to the solutions to the IPv6
multihoming problem. It surveys the main multihoming approaches that have
been proposed to the IETF over the period 2000 - 2005.
It proposes a taxonomy, and compares the solutions
according to their mechanisms, benefits and drawbacks. This survey also
outlines the major steps that have led to a new multihoming architecture
for IPv6.
To appear in IEEE Communications Surveys and Tutorials, 2006.
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