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Title : An Application of the BGP Extended Community Attribute for Distributed IPv6 Site Multihoming
Author(s) : K. Kim, et al.
Filename : draft-kim-bgp-community-site-multihoming-00.txt
Pages : 11
Date : 2003-10-23
This document presents for a new IPv6 site multihoming scheme and its
operational requirements. It aims at solving potential deployment
problems in 'IPv6 Multihoming Support at Site Exit Routers [2]'
using an application of BGP extended community attribute, called
multihomed community. In case of link failure in [2], basic
operations to support multihoming are entirely dependent on
functionality of border router in other ISPs. Hence, it causes
following problems; centralized encapsulation overhead for re-routing, packet delivery along un-optimized tunneling session, and losing
connectivity in case of ISP failure. Also, [2] do not provide any
alternative mechanism for long-term failure. For above reasons, if
the link remains failed for a long time, it has a little
applicability due to previously mentioned problems. In this memo, we
propose a new IPv6 site multihoming scheme, which establishes
multiple direct tunneling sessions between sender's site exit router
and reachable receiver's site exit router instead of one tunneling
session between border router and site exit router in [2].
Furthermore, with some additional BGP operations, it can preserve
connectivity of on-going sessions regardless of ISP, intermediate
link, as well as directly connected site link failure.
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