I know. I was being sarcastic.
It doesn't seem fair that they do TCP congestion control in a way that
doubles the traffic and we end up discarding 50% anyway, but it still
fills up our pipes. Just sayin'.
On 4/26/2015 8:37 PM, Faisal Imtiaz wrote:
I see that the net neutrality is going to be the next boogieman under
the bed for WISP's from now on...
Please, please, please, correct your understanding on Net-Neutrality...
It allows for one to traffic shape any and all kinds of traffic, as
long as :-
a) You declare your practice on your website.
b) You DON"T DO IT specific to A SPECIFIC Network.. i.e. all VOIP,
or all Video, or ALL Streaming..
(applying a throttle on video to netflix while allowing Hulu
would be considered a violation, but applying throttle to all types of
video content is NOT !)
:)
Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232
Help-desk: (305)663-5518 Option 2 or Email: [email protected]
------------------------------------------------------------------------
*From: *"George Skorup (Cyber Broadcasting)" <[email protected]>
*To: *[email protected]
*Sent: *Sunday, April 26, 2015 7:12:13 PM
*Subject: *Re: [AFMUG] 450SM sustain bucket throttle not working..
So you'd be purposely slowing down or blocking legitimate traffic
from an edge provider to the customer? Oh no, net neutrality
violation!
So when everyone starts with the 4k streaming and we're selling
the customer 20Mbps, then we have to take on 40Mbps because of this!?
On 4/26/2015 5:58 PM, Ken Hohhof wrote:
I could justify declaring such traffic an attack and blocking
the source as malicious.
*From:* George Skorup (Cyber Broadcasting)
<mailto:[email protected]>
*Sent:* Sunday, April 26, 2015 4:30 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] 450SM sustain bucket throttle not working..
Yep, I see this all the time and Ken is exactly right. The
Canopy QoS works exactly as designed, the AP is definitely not
delivering more than the sustained rate, but is instead
discarding the extra 50%. I've tested this situation
thoroughly. Stick a MT simple queue in at the upstream router
and the 2X rate traffic stops hitting the AP's ethernet
interface, but it's still coming in at double the sustained
rate farther upstream. There's no way around it except
throwing bandwidth at it.
This is CDN traffic. And when the customer thinks they can
install one of those "internet download managers" to speed up
their connection. The only thing it does is screw with TCP
acks or window sizes or something which just puts more traffic
on your transit just to be discarded at the congestion point
(SM, queue, Procera, whatever). Gotta love it.
You'd think with 70% of the internets being streaming video
they'd think hmm.. maybe we can cut down on the peering
congestion by NOT doing this crap. But no.
On 4/26/2015 11:01 AM, Ken Hohhof wrote:
Sorry to answer a question with a question, but are you
measuring at the SM, or at some upstream router?
The reason I ask, is I have seen some CDN traffic that
does not seem to follow traditional TCP congestion
control. It will send at twice the rate limit, causing
50% packet loss to its own traffic and everything else to
that same subscriber. Evidently some TCP geniuses have
decided to use latency rather than packet loss as the
indicator of congestion, and that the objective is goodput
not throughput. Works for last mile technologies like T1
and DSL with big buffers at the head end of the fixed
speed serial connection, not so good with the type of rate
limit queues we tend to use unless we can provision the
queues with big buffers.
Probably not your problem, but I thought I’d bring it up
just in case.
*From:* Kurt Fankhauser <mailto:[email protected]>
*Sent:* Sunday, April 26, 2015 10:50 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] 450SM sustain bucket throttle not working..
I have a 450 SM that is rate limited in the SM to 1500kbps
download on the sustain side. I noticed last night that
this customer was pulling a steady almost 3mbps download
for several hours on end. How is this possible? Is there a
problem with 13.2 firmware? Its a 3.65ghz SM.
see attached.
Kurt Fankhauser
Wavelinc Communications
P.O. Box 126
Bucyrus, OH 44820
http://www.wavelinc.com <http://www.wavelinc.com/>
tel. 419-562-6405
fax. 419-617-0110
