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Re: Extending shim6 to use multiple locator pairs simultaneously



Hi folks,


In terms of thinking about this, it might make sense to start with SCTP, since SCTP already supports tracking congestion information for each path. Then you can ask yourself what would be needed if both paths were used as the same time. Once we know what to do, then applying it to TCP would be conceptually simple (even though it might be hard in practice.) Note that SCTP only uses one path at a time, and only switches after detecting a failure. So AFAIK the SCTP folks didn't explore what would happen is both paths are used concurrently.

   Erik

The SCTP RFC doesn't support concurrent multiple path, but there are not a single researches in this area. CMT-SCTP proposed by PET in Univ. of Delaware is one of those researches and looks successful.

http://www.eecis.udel.edu/~amer/PEL/poc/index.html

As Eric suggests, it seems to me not a good idea to use multiple paths concurrently without any modifications to transport protocols. CMT-SCTP is just those modifications to SCTP.