Overhead depends on packet size and who's exactly measuring at what at
what layer, but probably about 5-10%. I bump customers up 10% so on a
10meg they'll see something like 10.1 or 10.2. I know Verizon FiOS does
this too. I figure if it saves even a handful of phone calls per year
then it was worth it.
On 9/29/2020 10:29 AM, Ken Hohhof wrote:
Two part question:
1) If you set a speed limit, like 10 Mbps, using Preseem or Mikrotik
queue or something similar, what do you expect to see at a speedtest
site like speedtest.net? I’m thinking something like 9.5 Mbps. I’m
assuming the bandwidth manager is looking at line rate but the speed
test looks at payload.
2) Do you “gross up” your speed limits so that the customer will see
100% of the advertised speed when they run a speedtest? If so, by how
much? Or do you assume any reasonable person when they see 9.5 Mbps
but are paying for 10 will say “close enough”? I seem to remember
that back when we were doing lineshared DSL, Verizon grossed up the
modem line rates, but AT&T didn’t.
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