Jim Gettys <[email protected]> writes: > Now, if someone gives me real fiber to the home, with a real switch fabric > upstream, rather than gpon life might be somewhat better (if the switches > aren't > themselves overbuffered.... But so far, it isn't.
As a data point for this, I have fibre to my apartment building and ethernet into the apartment. I get .5 ms to my upstream gateway and about 6 ms to Google. Still measured up to ~20 ms of bufferbloat while running at 100 Mbps... http://files.toke.dk/bufferbloat/data/karlstad/cdf_comparison.png However, as that graph shows, it is quite possible to completely avoid bufferbloat by deploying the right shaping. And in that case fibre *does* have a significant latency advantage. The best latency I've seen to the upstream gateway on DSL has been ~12 ms. -Toke
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