Fundamentally modifications to TCP are necessary
Posted Mar 29, 2013 20:22 UTC (Fri) by giraffedata
In reply to: Fundamentally modifications to TCP are necessary
Parent article: Multipath TCP: an overview
However if you want to use more than one of your available paths at once TCP must be changed.
I believe that is the question that some of us have. Why does TCP have to change? The IP I learned long ago has multipath routing built in and the TCP driver couldn't stop it if it wanted to. If TCP has to be involved in routing, then is part of MPTCP giving the layer above IP the ability to constrain how IP routes the packets?
I don't know anything about route advertisement protocols, but assuming there isn't one today that lets the handset merely tell the server that it can reach 126.96.36.199 via 188.8.131.52 (two of the handset's IP addresses), would it be harder to add that than to add the ability for the server to recognize two TCP destinations as the same place (MPTCP)?
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