[LARTC] 95th percentile billing

[rubens@etica.net]

> How do cable modems limit ?

That's a design decision. One network might choose the DOCSIS way and
program the cable-modems to do the limiting, other network might prefer
keeping the cable modem at highest speed possible and limit the speed in
a B-RAS, a broadband aggregation router (usually a big/expensive hardware
from Cisco, Juniper or RedBack).

> Here in tne uk you downloads always seam to start at wirespeed and then
> drop to the speed your paying

All shaping mechanisms will perform like this at some time scale. If it's
on sub-second window you probably won't notice.

> Can anyone who is on a burstable connection provide any example of how
> they allow busting for short periods

The trick here will be tuning your burst time/rate/bytes to match the
service provider in order to get the most of your connection. But that
would usually apply to ingress shaping; for a cable/xDSL connection, I
prefer limiting only on egress.


Rubens