>> Is locator selection a transport function? It would seem that having it be >> a unilaterally network layer function is over constraining the architecture. >> Yet, transport cannot perform intelligent locator selection without network >> layer input. > > I can't speak for MPTCP, but is seems to me that MPTCP is based on the > assumption that it *can* perform intelligent locator selection based on > feedback from transport layer ACKs (or their absence). That's if your > definition of intelligence is 'get the most out of the network layer > without caring about path selection.'
Brian, At least as I understood it, MPTCP can consider the full cross product of locators and make use of dynamic feedback for adjustments. The question I'm raising is whether that's sufficient. For example, if transport got feedback about path selection and congestion from the network layer, then perhaps transport could be more intelligent. For example, if multiple locator pairs all result in paths that coincide on a particular congested link, then the benefits of multi-pathing could be extremely limited. More information is available, if transport is willing to increase its interaction with the network layer. Regards, Tony _______________________________________________ rrg mailing list [email protected] http://www.irtf.org/mailman/listinfo/rrg
