What Rogers call 'service' [was: Micro Routers (Was: : Raspberry PI (as router))]

[Lennart Sorensen]

On Thu, Jun 14, 2012 at 03:18:08PM -0400, Bob Jonkman wrote:
> I wonder if there's some level of compression being applied to lower
> levels of the stack, so that the application can actually report a
> higher throughput than the pipe is capable of delivering directly...

Well there is PPP involved which could be doing compression, although I
am usually transfering stuff that isn't going to get any more compressed.

25Mbit=25000000bits=3125000bytes so even with a bit of overhead, using
1500 byte packets (or close to it) for http transfers, there really
doesn't seem to be any reason it shouldn't be close to 3000KB/s.

I believe PPP adds 8 bytes to a packet.  Ethernet header would be another
14 bytes, so a 1500 byte packet going over the VDSL2 PPPoE link should
be 1522 bytes.  If I scale by 1500/1522, I get 3079KB/s rather than
4125KB/s, so not much overhead there.

I just ran a dist-upgrade and hit 2856 kB/s download speed, although
the connection wasn't completely idle at the time.

-- 
Len Sorensen
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