Re: [multipathtcp] FW: New Version Notification for draft-ford-mptcp-multiaddressed-02

Rémi Després <remi.despres@free.fr> Fri, 06 November 2009 14:51 UTC

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From: Rémi Després <remi.despres@free.fr>
Date: Fri, 06 Nov 2009 15:51:15 +0100
To: "Ford, Alan" <alan.ford@roke.co.uk>
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Cc: multipathtcp@ietf.org, Scott Brim <scott.brim@gmail.com>
Subject: Re: [multipathtcp] FW: New Version Notification for draft-ford-mptcp-multiaddressed-02
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Le 6 nov. 09 à 15:34, Ford, Alan a écrit :

>> Ford, Alan allegedly wrote on 10/27/2009 10:03 AM:
>>>    o  Do we want a connection identifier in every packet?  E.g.
>>>      would make implementation of IDS much easier?
>>
>> I think so.  What are the arguments against it?  It deterministically
>> avoids the kind of cases that Joe was concerned about.
>
> Well the key argument against it would be the overhead it would  
> create,
> and also any issues with option space limits.

To deal with the option space limit, a possible approach, which I  
personally recommend, consists in using a TCP option only in the  
initial SYN ACK exchange.
Once it is established that both ends support MPTCP, a MPTCP service  
field in in the TCP payload can be used.

RD