Re: [shim6] AD review of draft-garcia-shim6-applicability-00.txt

Brian E Carpenter <> Thu, 22 December 2011 22:05 UTC

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Date: Fri, 23 Dec 2011 11:04:53 +1300
From: Brian E Carpenter <>
Organization: University of Auckland
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Cc: 'marcelo bagnulo braun' <>, 'shim6' <>, 'Joe Abley' <>
Subject: Re: [shim6] AD review of draft-garcia-shim6-applicability-00.txt
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> "In order to successfully deploy Shim6 in a multihomed site, additional
> mechanism may be required to solve issues such as selecting the source
> address appropriate to the destination and to the outgoing provider, or to
> allow the network manager to perform traffic engineering. Such problems are
> not specific of Shim6, but are suffered by the hosts of any site which is
> connected to multiple transit providers, and which receives an IPv6 prefix
> from each of them. Some of these mechanisms are not defined today."

I fully agree with this text, but if possible can you emphasise even more
that these problems are problems of sites with multiple prefixes and *in
no way* caused by shim6? Actually shim6 reduces the impact of these problems,
because if there is a working path shim6 will find it, which is also true
for MPTCP and happy-eyeballs, but *not* true for vanilla IPv6.