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:[email protected]>
*Sent:* Sunday, April 26, 2015 8:37 PM
*To:* [email protected] <mailto:[email protected]>
*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: [email protected]
------------------------------------------------------------------------
*From: *"George Skorup (Cyber Broadcasting)" mailto:[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
