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Re: [multipathtcp] [tcpm] Working group acceptance of draft-bonaventure-mptcp-converters ?

Joe Touch <touch@strayalpha.com> Wed, 06 December 2017 14:27 UTC

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To: mohamed.boucadair@orange.com, "Scharf, Michael (Nokia - DE/Stuttgart)" <michael.scharf@nokia.com>, "tcpm@ietf.org" <tcpm@ietf.org>, multipathtcp <multipathtcp@ietf.org>
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From: Joe Touch <touch@strayalpha.com>
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Date: Wed, 06 Dec 2017 06:27:17 -0800
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Subject: Re: [multipathtcp] [tcpm] Working group acceptance of draft-bonaventure-mptcp-converters ?
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Med,

On 12/6/2017 1:55 AM, mohamed.boucadair@orange.com wrote:
> [Med] I already commented on tcpmux and RFC7805. Most of items in 7805 do not apply to the converter specification. 
>
> If the only reason is: 
>
>       *  It requires all new connections to be received on a single
>          port, which limits the number of connections between two
>          machines.    
>
> I'd like to warrant that this is exactly what popular protocols are doing (e.g. SOCKS). Should the IETF obsoletes SOCKS for that? I guess, no.  
TCPMUX was deprecated *as part of TCP* for these reasons.

IMO, SOCKS is no better. In both cases, capable systems are better
served by a tunnel than application layer proxies that provide
insufficient alternatives, because they end up pushing Internet service
up to Layer 7, where it will eventually need to be reinvented and the
problem being solved (e.g., desire to better support TCP options) will
occur again.

However, as I said, there's no reason to avoid this approach if this
remains at the application layer, from an process perspective. It just
has no benefit or utility in being developed in TCPM.

Joe

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