North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Ping flooding
> Really, consider a link where the path carrying most of the data has > a time of N and the path carrying the ack has a path 2N or N + 1/2N > You are computing an average which seems like it could be skewed based > on the path the ack takes. This doesn't matter. The key notions for TCP are (1) what's the time scale for feedback, and (2) what's the pipe size (= bandwidth-delay product). Both of these are determined by the RTT and not the one-way prop time. > Does anyone know of any papers on the effect of asymetric paths on TCP > performance? Well, I thought about this quite a bit for my end-to-end routing study (ftp://ftp.ee.lbl.gov/papers/routing.SIGCOMM.ps.Z). I really wanted to come up with some reason why asymmetric routing has serious implications for TCP performance, but wasn't able to. I guess this is a good thing, since 50% of the paths in my study were asymmetric in terms of visiting at least one different city in the two directions. 30% visited at least one different AS. Vern - - - - - - - - - - - - - - - - -
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