Dont forget the latencies introduced by routing hardware..Id not expect the average DSL modem to be to snappy about its internal packet forwarding performance.
http://rescomp.stanford.edu/~cheshire/rants/Latency.html Thats a good read On Thu, 29 Nov 2001, Leo Bicknell wrote: > On Fri, Nov 30, 2001 at 03:23:45AM +0100, Pierre Beyssac wrote: > > I can't reproduce this result, 16K fills a T1 for 11 ms, which is > > 22000 km (at 2/3 of light speed), enough to get halfway round the > > earth... > > Your math is a little funny. > > 4000 km New York to LA > > c = 300,000 km/sec > > Speed of light in fiber, approximately .66 c, or 198,000 km/sec. > Approximate sum of buffering + serialization delay in the network, > is a 15% penalty, or 168,300 kph. total speed. > > 4000 km one way == 8000 km two way, 8000 / 168300 = 47ms in my book, > theoretial optimum. > > With an RTT of 47ms, you can move 16k per RTT, or or about 340k/sec. > > * If you find a cross country RTT of 47 ms I'll personally send you > $20. around 60-65 is normal for "good circuits", and 70-90 is > not wholely unusual. > > * The 340k/sec assumes perfect network conditions, that is no dropped > or delayed packets. > > Please search the archives. There are reams of information about > this. > > -- > Leo Bicknell - [EMAIL PROTECTED] - CCIE 3440 > PGP keys at http://www.ufp.org/~bicknell/ > Read TMBG List - [EMAIL PROTECTED], www.tmbg.org > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-hackers" in the body of the message > --- Geoff Mohler To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
