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Re: [Int-area] Middleboxes to aid the deployment of MPTCP

Joe Touch <touch@isi.edu> Wed, 19 July 2017 19:43 UTC

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To: mohamed.boucadair@orange.com, Olivier Bonaventure <olivier.bonaventure@tessares.net>, Internet Area <int-area@ietf.org>, "tsv-area@ietf.org" <tsv-area@ietf.org>
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From: Joe Touch <touch@isi.edu>
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Date: Wed, 19 Jul 2017 12:43:21 -0700
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Subject: Re: [Int-area] Middleboxes to aid the deployment of MPTCP
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On 7/19/2017 11:34 AM, mohamed.boucadair@orange.com wrote:
>
> Joe,
>
>  
>
> As mentioned in a previous message in this thread, TCP-AO extensions
> (6978) to pass NATs will be required otherwise TCP-AO will fail
> because of:
>
> -    Manipulating multiple addresses
>
> -    At least one of the source IP addresses will be rewritten.
>
TCP-AO-NAT is experimental.

It also has nothing to do with whether the TCP options are covered -
that's determined by the MKT on a per-connection basis, and is opaque to
on-path devices.

An on-path device that manipulates TCP options would break TCP-AO-NAT if
the MKT covers the options.

Joe

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