I think George forgot the sarcasm emoticon.
Also note that the problem here is the edge provider is sending more
than the customer’s plan rate, ignoring TCP congestion control. Not
only does this consume Internet bandwidth over and above what the
customer has subscribed to, it makes anything else the customer is
trying to do on the Internet unusable because normal TCP is unusable
with 50% packet loss. It is not surprising the customer calls
saying his Internet is slow.
There’s a saying that comes to mind, involving a 5 pound bag.
*From:* Faisal Imtiaz <mailto:fai...@snappytelecom.net>
*Sent:* Sunday, April 26, 2015 8:37 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] 450SM sustain bucket throttle not working..
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: supp...@snappytelecom.net
------------------------------------------------------------------------
*From: *"George Skorup (Cyber Broadcasting)"
mailto:geo...@cbcast.com
*To: *af@afmug.com
*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:geo...@cbcast.com>
*Sent:* Sunday, April 26, 2015 4:30 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*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:li...@wavelinc.com>
*Sent:* Sunday, April 26, 2015 10:50 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*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
