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<title>Topic &#x27;Bandwidth Limits - Comcast vs. Verizon FiOS/Cox/ATT&#x27; in forum &#x27;Comcast HSI&#x27; - dslreports.com</title>
<link>http://www.dslreports.com/forum/Bandwidth-Limits-Comcast-vs-Verizon-FiOSCoxATT-21032722</link>
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<language>en</language>
<pubDate>Tue, 21 May 2013 14:13:36 EDT</pubDate>
<lastBuildDate>Tue, 21 May 2013 14:13:36 EDT</lastBuildDate>

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<title>Re: The Bandwidth Limits/Congestion Management Topic</title>
<link>http://www.dslreports.com/forum/Re-The-Bandwidth-LimitsCongestion-Management-Topic-23818847</link>
<description><![CDATA[sortofageek posted : Please see my note in the first post of this thread.<br><br>                                                                                                                <br><small>--<br><A HREF="/faq/2913">Join Team Helix</a> * I am praying for these <A HREF="/faq/15254"> friends </a>.</small>]]></description>
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<pubDate>Wed, 17 Feb 2010 18:14:53 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23802142</link>
<description><![CDATA[Eliton posted : <div class="bquote"><small>said by <a href="/profile/1695533" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1695533');">jseymour</a>:</small><br><br><div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br>22gb is a fair bit. If someone decided to download a season or two of tv shows via torrents, and opted for the 1gb per show "HD" capture, that would easily do it. Or they downloaded 5 "discography" illegal mp3 rips.<br><br>Or they spent $4,460.544 on iTunes ;)<br><br>Or they downloaded every linux distro they could find. Twice.</div>Hey, I'm new to this "downloading" thing.  I just got onto Comcast Business HSI... what... a couple weeks ago?  Before that we had a 144kb/s IDSL circuit.  Believe me: Nobody does much downloading on a 144kb/s IDSL circuit ;)<br><br>I was just going from what this guy wrote: &raquo;<A HREF="/forum/r23749974-">Re: [Connectivity] Disconnections every other day</A><br></div>Well like I also said my whole Family contributed to the "call" from Comcast.  ;)<br><br>And yes.. I probably can state the whole acceptable use policy word for word... lol]]></description>
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<pubDate>Sun, 14 Feb 2010 11:32:33 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23799571</link>
<description><![CDATA[jseymour posted : <div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br>22gb is a fair bit. If someone decided to download a season or two of tv shows via torrents, and opted for the 1gb per show "HD" capture, that would easily do it. Or they downloaded 5 "discography" illegal mp3 rips.<br><br>Or they spent $4,460.544 on iTunes ;)<br><br>Or they downloaded every linux distro they could find. Twice.</div>Hey, I'm new to this "downloading" thing.  I just got onto Comcast Business HSI... what... a couple weeks ago?  Before that we had a 144kb/s IDSL circuit.  Believe me: Nobody does much downloading on a 144kb/s IDSL circuit ;)<br><br>I was just going from what this guy wrote: &raquo;<A HREF="/forum/r23749974-">Re: [Connectivity] Disconnections every other day</A><br><br><div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br>Anway, sure, 20+gb is easy enough to do, if you're turning an entire building loose on your connection. <br> </div>Which it looks like he's doing.  Does nobody ever read the SOA/TOS/AUP?  Even my Business account prohibits that kind of thing, if I understand correctly.<br><br>Jim]]></description>
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<pubDate>Sat, 13 Feb 2010 16:34:26 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23799006</link>
<description><![CDATA[AVonGauss posted : <div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br>Or they spent $4,460.544 on iTunes ;)</div>Music, maybe, television, not so much...<br><br>144 GB / 1.45 GB = 99 HD Shows = $299 (2.99 per)<br>144 GB / 640  MB = 230 SD Shows = $458 (1.99 per)<br><br>The above numbers are averages and estimates, with loose math, and do not include any season purchase discounts which would lower your cost while still yielding the same transfer.<br><br>That said, this is probably not the OP issue.]]></description>
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<pubDate>Sat, 13 Feb 2010 13:43:53 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23798837</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/1695533" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1695533');">jseymour</a>:</small><br><br><div class="bquote"><small>said by blacad  :</small><br><br>but i have a hard time believing i dbled bandwidth consumption in one month... seriously<br><br>and currently my Feb usage (right now) is 144 gigs... it was 122 last night... so seriously, 22 gigs from 3am til 1pm????<br> </div>There are any number of explanations for this.  One is several users all-of-a-sudden discovering they can download music, movies and no end of other content, and going on download sprees.  (A recent poster in this very forum had that very problem at home.)  The other is one-or-more PCs having gotten "owned" and becoming parts of botnets, warez mirrors, or virus/worm/Trojan re-broadcasters.  That second possibility is fairly common and a nearly guaranteed eventuality when there are multiple less-than-clueful/-careful end-users on poorly-protected Windows PCs and no network border protection--<b>even if they have anti-virus software</b>.<br> </div>22gb is a fair bit. If someone decided to download a season or two of tv shows via torrents, and opted for the 1gb per show "HD" capture, that would easily do it. Or they downloaded 5 "discography" illegal mp3 rips.<br><br>Or they spent $4,460.544 on iTunes ;)<br><br>Or they downloaded every linux distro they could find. Twice.<br><br>Anway, sure, 20+gb is easy enough to do, if you're turning an entire building loose on your connection. <br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
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<pubDate>Sat, 13 Feb 2010 12:57:24 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23797411</link>
<description><![CDATA[jseymour posted : <div class="bquote"><small>said by blacad :</small><br><br>but i have a hard time believing i dbled bandwidth consumption in one month... seriously<br><br>and currently my Feb usage (right now) is 144 gigs... it was 122 last night... so seriously, 22 gigs from 3am til 1pm????<br> </div>There are any number of explanations for this.  One is several users all-of-a-sudden discovering they can download music, movies and no end of other content, and going on download sprees.  (A recent poster in this very forum had that very problem at home.)  The other is one-or-more PCs having gotten "owned" and becoming parts of botnets, warez mirrors, or virus/worm/Trojan re-broadcasters.  That second possibility is fairly common and a nearly guaranteed eventuality when there are multiple less-than-clueful/-careful end-users on poorly-protected Windows PCs and no network border protection--<b>even if they have anti-virus software</b>.<br><br>Jim]]></description>
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<pubDate>Sat, 13 Feb 2010 00:36:41 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23789065</link>
<description><![CDATA[espaeth posted : <div class="bquote"><small>said by blacad :</small><br><br>so i turned off all the routers i manage in my apt building so that i was the only one using the signal... same problem</div>You're providing access for multiple tenants off a residential connection?<br><br>That's a risky strategy:  &raquo;<A HREF="http://arstechnica.com/telecom/news/2009/03/comcast-goes-after-illegal-resale-of-its-internet-service.ars" >arstechnica.com/telecom/news/200&middot;&middot;&middot;vice.ars</A>]]></description>
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<pubDate>Thu, 11 Feb 2010 13:44:03 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23784577</link>
<description><![CDATA[anon posted : my connection last night (3am) was horrible... i checked a few bandwidth meters and my download speed was acceptable, but upload never even kicked in... finall i got several readings of sub 100 kbps...<br><br>so i turned off all the routers i manage in my apt building so that i was the only one using the signal... same problem<br><br>then i decide to google any info on upload problems with Comcast... and stumbled upon the 250gb limit that i had NO IDEA about...<br><br>i checked the meter and it said i had used 253 gigs in December and 560 in Jan... this 560 seems to be a common number if you google it... perhaps the meter doesn't go above this limit, who knows?<br><br>but i have a hard time believing i dbled bandwidth consumption in one month... seriously<br><br>and currently my Feb usage (right now) is 144 gigs... it was 122 last night... so seriously, 22 gigs from 3am til 1pm????<br><br>i'm not buying it... and they have yet to contact me out here either (Seattle)<br><br>if they disconnect me without warning i'll be POed]]></description>
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<pubDate>Wed, 10 Feb 2010 15:58:54 EDT</pubDate>
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<title>Re: Is business class speed consistent when residential fluctuat</title>
<link>http://www.dslreports.com/forum/Re-Is-business-class-speed-consistent-when-residential-fluctuat-23778046</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/614832" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=614832');">Hel</a>:</small><br><br>I If I were to get comcast business class, would it likely have the same problem my previous residential service did, slow downs when everyone in the apartment building is home&online?<b>I've already been told that with business class, comcast guarantees speed from the node</b><br> </div>Who told you that? No one from comcast, I would guess. You've got NO SLA on speed, just the same as residential best effort delivery. Your packets are no more or less blessed, and are subject to the same congestion management system as well.<br><br>I don't see any variation in speed in my residential (single family home) area that is upgraded to docsys 3.0, but I have no idea if your apartment building is on a congested node that is oversubscribed or not. One would think the congestion management system would help if it was - how long ago did you have comcast, and do you know if your area is upgraded to docsys 3.0? What speeds can you get for business class?<br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
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<pubDate>Tue, 09 Feb 2010 13:09:58 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23777431</link>
<description><![CDATA[bgoodbody posted : Hmm. I think of myself as a resonabbly heavy user. On 18hrs 3 computers. <br><br>Looked at the Traffic meter in WNR100v2 from comcast. Looks like i'm usng about 12 - 25 GB per month. Not even close to the cap.....<br><small>--<br>- Bill</small>]]></description>
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<pubDate>Tue, 09 Feb 2010 11:25:58 EDT</pubDate>
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<title>Re: Is business class speed consistent when residential fluctuat</title>
<link>http://www.dslreports.com/forum/Re-Is-business-class-speed-consistent-when-residential-fluctuat-23771219</link>
<description><![CDATA[AVonGauss posted : How long has it been since you had the HSI service?  If it's been a while, it might be worth it to try the residential service again as there is no contract or commitment.  If the residential performs better than your previous experience, you could always switch to the business class later if that is your intent.]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Is-business-class-speed-consistent-when-residential-fluctuat-23771219</guid>
<pubDate>Mon, 08 Feb 2010 08:54:13 EDT</pubDate>
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<title>Is business class speed consistent when residential fluctuates?</title>
<link>http://www.dslreports.com/forum/Is-business-class-speed-consistent-when-residential-fluctuates-23770821</link>
<description><![CDATA[Hel posted : I previously had comcast residential, and got horrible speeds (I'm talking dialup slow!) at certain times of day (when everyone in the apartment building I live in would get home from work, for example). I ultimately moved to DSL, since it gave me consistent speed. I've been looking at switching back to comcast, but don't want to switch to residential cos of the previously lousy experience and cos of the caps. If I were to get comcast business class, would it likely have the same problem my previous residential service did, slow downs when everyone in the apartment building is home&online? I've already been told that with business class, comcast guarantees speed from the node, but I don't know enough about the infrastructure to know if that means my connection would no longer be susceptible to other use in the building or not.<br>Thanks!<br><small>--<br>&#147;When fascism comes to America, it will be wrapped in the flag, carrying a cross."-Sinclair Lewis 1885-1951</small>]]></description>
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<pubDate>Mon, 08 Feb 2010 02:34:00 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23769257</link>
<description><![CDATA[nate1234 posted : lol i did more than that for the past few months and have gotten nothing... crossing my fingers]]></description>
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<pubDate>Sun, 07 Feb 2010 17:40:25 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23768975</link>
<description><![CDATA[spikedz posted : As of this week, for Nov, Dec and Jan i averaged 340gb per month. No calls and not cutoff.]]></description>
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<pubDate>Sun, 07 Feb 2010 16:05:26 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23728942</link>
<description><![CDATA[chong67 posted : This is how I figure mine out ...<br><br>Since I am going to turn on my computer about 16 hrs a day anyway, it doesnt matter if I got 50 mbps or 100 mbps download.  I can wait for it to download.<br><br>I think 6 mbps is my comfort zone and 12 mbps is just icing on the cake.<br><br>One thing I do wish is upload speed should keep getting higher.]]></description>
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<pubDate>Sat, 30 Jan 2010 17:16:24 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23723091</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br>So, here's a chance for <b>you</b> to be the smart one.  <br> </div>If you need TB of data to go along with the SPEED you currently pay for, switch to 50/10 business class.<br><br>Same speed, but at $189/mo you pay for all the bandwidth you can use. Or at least many TB of data a month.<br><br>There you go. Go for it!<br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
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<pubDate>Fri, 29 Jan 2010 12:46:31 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23721870</link>
<description><![CDATA[funchords posted : <br><div class="bquote"><small>said by saywatcomcas :</small><br><br>am like what the cap for the Economy Internet Service<br>that is 1mb DOWN max<br>and their like, their cap is also 250g,<br><br>am like, am paying 4 times what they pay for 50mb line<br> </div>So, here's a chance for <b>you</b> to be the smart one.  <br><br>Since you download a lot, don't download at faster than 750 Kbps (93 KB/s) and you'll never download more than 243 GB/mo.  You don't need the 50 Mbps service, you can do that on the 1 Mbps (1000 Kbps) economy-class line!<br><br>Of course, if you do like surfing really fast, too, and watching YouTube and other things like that, then keep your faster connection and set your constant downloader to 60 KB/s or 500 Kbps.  That will give you some left over in the 250 GB budget for your other things.<br><br>(*if you share this connection with your family, be sure to divide the budgeted amounts between them.)<br><small>--<br>Robb Topolski -= <A HREF="http://funchords.com/">funchords.com</a> =- District of Columbia  -- KJ7RL<br><i>Tweet! Tweet!</i> -- &raquo;<A HREF="http://twitter.com/funchords" >twitter.com/funchords</A></small>]]></description>
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<pubDate>Fri, 29 Jan 2010 09:25:48 EDT</pubDate>
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<description><![CDATA[anon posted : <small>deleted by a moderator</small>]]></description>
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<pubDate>Thu, 28 Jan 2010 19:14:07 EDT</pubDate>
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<description><![CDATA[anon posted : <small>deleted by a moderator</small>]]></description>
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<pubDate>Thu, 28 Jan 2010 18:30:46 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23718977</link>
<description><![CDATA[WernerSchutz posted : <div class="bquote"><small>said by saywatcomcas  :</small><br><br>i just talked to a comast rap<br>they bitched at me for having passed their 250g monthly cap<br><br>thing is, am one of their  COMCAST Xtreme: 50Mb Down/12 Up <br><br>am like this is a sick joke<br>, i can download 250g in 3 days easy if i wanted to<br>and the rap just played dumb<br><br>this is the must stupid company ever <br><br>am like what the cap for the  Economy Internet Service<br>that is 1mb DOWN max<br>and their like, their cap is also 250g,<br><br>am like, am paying 4 times what they pay for 50mb line<br>and the cap the same,  she just keeped on playing am a totaly dumbass robot that repeats the same lines<br><br>atfer i told her in not so nice terms,  their threats to disconnect me for heavy use would not taken into account and hang on on her in disbelief at the amount of stupidness that is comcast caps<br> </div>What the rep told you is true. Having the 50 Mb tier has the same transfer cap as the 1 Mb. If you go over the treshhold again, they might disconnect you.<br><br>You could either subscribe to business class or watch to be under the 250 GB/mo. What you tell the rep does not really matter.]]></description>
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<pubDate>Thu, 28 Jan 2010 17:03:14 EDT</pubDate>
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<description><![CDATA[anon posted : <small>deleted by a moderator</small>]]></description>
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<pubDate>Thu, 28 Jan 2010 17:00:21 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23718784</link>
<description><![CDATA[C_Chipperson posted : I don't know what your question is.]]></description>
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<pubDate>Thu, 28 Jan 2010 16:29:20 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23718019</link>
<description><![CDATA[chong67 posted : WOW Your sub english is hard to understand. ]]></description>
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<pubDate>Thu, 28 Jan 2010 14:18:03 EDT</pubDate>
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<title>Re: Bandwidth Limits/Congestion Management - All discussion here</title>
<link>http://www.dslreports.com/forum/Re-Bandwidth-LimitsCongestion-Management-All-discussion-here-23709907</link>
<description><![CDATA[anon posted : i just talked to a comast rap<br>they bitched at me for having passed their 250g monthly cap<br><br>thing is, am one of their  COMCAST Xtreme: 50Mb Down/12 Up <br><br>am like this is a sick joke<br>, i can download 250g in 3 days easy if i wanted to<br>and the rap just played dumb<br><br>this is the must stupid company ever <br><br>am like what the cap for the  Economy Internet Service<br>that is 1mb DOWN max<br>and their like, their cap is also 250g,<br><br>am like, am paying 4 times what they pay for 50mb line<br>and the cap the same,  she just keeped on playing am a totaly dumbass robot that repeats the same lines<br><br>atfer i told her in not so nice terms,  their threats to disconnect me for heavy use would not taken into account and hang on on her in disbelief at the amount of stupidness that is comcast caps]]></description>
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<pubDate>Wed, 27 Jan 2010 06:33:04 EDT</pubDate>
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<title>After shut off, allowed to get business class with no hassles</title>
<link>http://www.dslreports.com/forum/After-shut-off-allowed-to-get-business-class-with-no-hassles-23675052</link>
<description><![CDATA[freshzive posted : @skreweler2<br><br>Yes, you can still sign up for business class service. I went over a 2nd time in December and was recently shut off. Surprisingly, they never actually called to tell me my service was cancelled. I called in to tech support to inquire why my modem wasn't receiving an IP and the lady was basically like "Huh? You don't have internet service with us."<br><br>Anyway, I signed up for business class and there weren't any issues, the cancellation was never mentioned. When they asked why I was signing up for business class service, I told them it was due to bandwidth issues with my residential service. The lady said that they "don't currently have any bandwidth limitations on their business service" but it's possible they would be put into place in the future. She assured me that I would be informed if that ever happened.<br><br>Hope this helps.]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/After-shut-off-allowed-to-get-business-class-with-no-hassles-23675052</guid>
<pubDate>Wed, 20 Jan 2010 17:21:03 EDT</pubDate>
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<title>Service cancelled</title>
<link>http://www.dslreports.com/forum/Service-cancelled-23668009</link>
<description><![CDATA[anon posted : so looks like my service was cancelled.  I thought I was under the 250gb too.<br><br>do I still have a chance to upgrade to business class or am I screwed out of comcast for a year no matter what?]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Service-cancelled-23668009</guid>
<pubDate>Tue, 19 Jan 2010 14:57:42 EDT</pubDate>
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<title>(topic move) Seems like Usenet getting throttled</title>
<link>http://www.dslreports.com/forum/topic-move-Seems-like-Usenet-getting-throttled-23661614</link>
<description><![CDATA[sortofageek posted : <br><u>Moderator Action</u><br>The post that was here (and all 2 followups to it), has been moved to a new topic .. &raquo;<A HREF="/forum/remark,23658979">Seems like Usenet getting throttled</A>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/topic-move-Seems-like-Usenet-getting-throttled-23661614</guid>
<pubDate>Mon, 18 Jan 2010 12:34:31 EDT</pubDate>
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<title>(topic move) [OT]  Just a little fun on the side ...</title>
<link>http://www.dslreports.com/forum/topic-move-OT-Just-a-little-fun-on-the-side-23639653</link>
<description><![CDATA[sortofageek posted : <br><u>Moderator Action</u><br>The post that was here (and all 4 followups to it), has been moved to a new topic .. &raquo;<A HREF="/forum/remark,23638074">[OT]  Just a little fun with the Greek choir ...</A>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/topic-move-OT-Just-a-little-fun-on-the-side-23639653</guid>
<pubDate>Wed, 13 Jan 2010 21:53:14 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23638153</link>
<description><![CDATA[sortofageek posted : Please see your Instant Messages.  Nobody is trying to insult you here.  In fact, many are trying to help you.<br><br>Please take this to a new topic and allow others to assist you in troubleshooting.  Unless that new topic makes it clear this is a Comcast congestion management issue, please don't continue in this huge thread.<br><br>For those following this issue,  fuziwuzi <A HREF="/useremail/u/1227273"><IMG SRC="http://i.dslr.net/bb/profile.gif" ALT="See Profile" BORDER=0 WIDTH=16 HEIGHT=11></A> has started a help topic here --->  &raquo;<A HREF="/forum/r23642070-Throttling">Throttling?</A><br><br><small>--<br><A HREF="/faq/2913">Join Team Helix</a> * I am praying for these <A HREF="/faq/15254"> friends </a>.</small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23638153</guid>
<pubDate>Wed, 13 Jan 2010 17:10:51 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635755</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>I am quite aware of what Powerboost is and isn't, I'm not an idiot. </div>Good, are you ready to try and fix your issue now?<br> <blockquote><small>quote:</small><hr> And aren't you so lucky!  I'm not that lucky here.<hr></blockquote><br>Good. Now we have established you're having a site-specific issue. I am not lucky, I am simply not having any service issues.<br> <blockquote><small>quote:</small><hr>  The Comcast technicians who have been to my location say everything is working as designed.<hr></blockquote><br>Were you seeing the performance issue during the tech visits? Did they reproduce the exact issue on their equipment? If not, then likely the tech was correct - as far as they could see, you were operating correctly at that moment.<br><div class="bquote">  THEY told me the problem is actually how the system is designed, so in effect, it is working as it is supposed to, according to them.<br> </div>If all they had to go on was your description, then I would expect that would be the on-site tech's answer to why your system, which seemed to be working correctly, would experience slowdowns.<br><br>At this point all I can do is join the greek choir and suggest you start a new thread with detailed information and work with both the mass of people here and the comcast techs here to troubleshoot your issue. Because it is a service issue. Plain and simple. Really.<br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635755</guid>
<pubDate>Wed, 13 Jan 2010 11:25:16 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635505</link>
<description><![CDATA[AVonGauss posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>You make a lot of inaccurate assumptions.</div>Quite possible, which is why I and others have suggested to you to start a separate thread and post the details of your configuration and the details of what you are doing when you see the problem.<br><br><div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>The problem occurs whether using FTP or P2P, doesn't matter, anything involving a large file transfer.   Problem occurs regardless of the presence of a router or not (i.e. plugging directly into the modem).  Problem occurs with my own modem or a borrowed modem from the Comcast technician.  Problem occurs regardless of operating system or computer (1 WinXP, 2 Win7 64-bit, 1 Macbook Pro).</div>That's a few more details, but it would be really good to start a new thread and put all the pieces together to give a complete picture.<br><br><div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Comcast, via their CSRs and several onsite technicians say I have 12/2 service, are you saying they've lied to me?</div>No, that's not what I said and I think you know that.  You can however confirm easily for yourself by downloading a large file such as a Linux ISO via a browser and look at the transfer rate after it has transfered about 60MB or so.  If the download rate is 1.5 MB/s that would be 12/2 or if 1 MB/s that would 6/1.]]></description>
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<pubDate>Wed, 13 Jan 2010 10:46:16 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635440</link>
<description><![CDATA[fuziwuzi posted : <div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br>Unless you are mistaking speedboost for your actual speed? Speedboost will drop out in a few seconds, you should see 1.4Mbit down on a 12/2 line consistently after speedboost. <br><br>I can run at my rated pipe speed for hours on end in a high density residential area.<br><br>Have you tried posting in the comcast help forum here? <br> </div>I am quite aware of what Powerboost is and isn't, I'm not an idiot.  And aren't you so lucky!  I'm not that lucky here.  The Comcast technicians who have been to my location say everything is working as designed.  THEY told me the problem is actually how the system is designed, so in effect, it is working as it is supposed to, according to them.<br><small>--<br>***************<br>I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.<br>  - Stephen Hawking</small>]]></description>
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<pubDate>Wed, 13 Jan 2010 10:36:49 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635424</link>
<description><![CDATA[fuziwuzi posted : <div class="bquote"><small>said by <a href="/profile/1499612" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1499612');">AVonGauss</a>:</small><br><br> From the vague references to the actual symptoms you have posted, it sounds more like you are trying to use a P2P program and are having trouble with the upstream which usually involves the items below:<br><br>1) Your router's NAT table is becoming overloaded.<br>2) Your upstream is becoming over-saturated.<br>3) You believe you're on 12/2, but are really still on 6/1 - see #2.<br><br>The way I see it; you can continue to think that we must be a bunch of morons that don't get it and are trying to spread evil corporate propaganda, or, if this is an actual problem that you would like solved it might be worth considering using a different approach.<br> </div>You make a lot of inaccurate assumptions.  The problem occurs whether using FTP or P2P, doesn't matter, anything involving a large file transfer.   Problem occurs regardless of the presence of a router or not (i.e. plugging directly into the modem).  Problem occurs with my own modem or a borrowed modem from the Comcast technician.  Problem occurs regardless of operating system or computer (1 WinXP, 2 Win7 64-bit, 1 Macbook Pro).  Comcast, via their CSRs and several onsite technicians say I have 12/2 service, are you saying they've lied to me?<br><small>--<br>***************<br>I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.<br>  - Stephen Hawking</small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23635424</guid>
<pubDate>Wed, 13 Jan 2010 10:34:20 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23634960</link>
<description><![CDATA[jlivingood posted : <div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br>I believe you, but I don't do propaganda.  Your problems are real.  Do they jive with the descriptions of the causes?<br> </div>What I'd recommend is that fuziwuzi start a new thread and post all of his information so folks can assist in examining the issue.  This means make/model of all equipment (modem, home gateway, etc.), OS of any devices on the network, OS of the specific device with the problem, signal levels from modem, highly detailed description of the problem (app in use, data transfer attempted with file size, traceroutes, time of day, etc.).<br><br>It'd be more fun IMHO to try to figure out what the real problem is here with fuziwuzi (just not in this thread of course).  :-)<br><small>--<br>JL<br>Comcast</small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23634960</guid>
<pubDate>Wed, 13 Jan 2010 09:21:29 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23632397</link>
<description><![CDATA[funchords posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>if I attempt a file transfer at any time of day or night using full bandwidth my speeds will be cut within a few minutes</div>If "a few minutes" is less than 10, then you're not affected by Comcast's bandwidth management method. <br><br><div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>iSo, then, my observations tell me one thing while you guys say something else.  I believe my own eyes over propaganda. </div>I believe you, but I don't do propaganda.  Your problems are real.  Do they jive with the descriptions of the causes?<br><small>--<br>Robb Topolski -= <A HREF="http://funchords.com/">funchords.com</a> =- District of Columbia  -- KJ7RL<br><i>Test your Broadband connection today!</i> -- &raquo;<A HREF="http://measurementlab.net/" >measurementlab.net/</A></small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23632397</guid>
<pubDate>Tue, 12 Jan 2010 18:39:27 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23630400</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>So, then, my observations tell me one thing while you guys say something else.  I believe my own eyes over propaganda.<br> </div>You're the only one seeing this, or your area is terribly oversubscribed, or you have some technical problem.<br><br>Unless you are mistaking speedboost for your actual speed? Speedboost will drop out in a few seconds, you should see 1.4Mbit down on a 12/2 line consistently after speedboost. <br><br>I can run at my rated pipe speed for hours on end in a high density residential area.<br><br>Have you tried posting in the comcast help forum here? <br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23630400</guid>
<pubDate>Tue, 12 Jan 2010 13:05:44 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23630201</link>
<description><![CDATA[AVonGauss posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Then my node must be horribly overutilized because I can assure you if I attempt a file transfer at any time of day or night using full bandwidth my speeds will be cut within a few minutes and will remain so.  If I stop the transfer and wait, speeds will return to normal.  If I manually limit my transfer speeds to about 60-65% of maximum, my the transfers complete as normal.<br><br>That is my continued observations of the Comcast system and has been for the several months that the "upgrade" has been implemented in my area (getting the 12/2 upgrade from 6/1).  Comcast techs continue to say my line is "clean" and everything is functioning within specs.<br><br>So, then, my observations tell me one thing while you guys say something else.  I believe my own eyes over propaganda.<br> </div>Speaking of propaganda, you still haven't taken the 5 minutes to actually explain what you are doing and the problem / symptoms that you are seeing.  From the vague references to the actual symptoms you have posted, it sounds more like you are trying to use a P2P program and are having trouble with the upstream which usually involves the items below:<br><br>1) Your router's NAT table is becoming overloaded.<br>2) Your upstream is becoming over-saturated.<br>3) You believe you're on 12/2, but are really still on 6/1 - see #2.<br><br>The way I see it; you can continue to think that we must be a bunch of morons that don't get it and are trying to spread evil corporate propaganda, or, if this is an actual problem that you would like solved it might be worth considering using a different approach.]]></description>
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<pubDate>Tue, 12 Jan 2010 12:35:44 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23629982</link>
<description><![CDATA[EG posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Yes, it does happen.  That's the point YOU ignore.<br> </div>W.I.W., node devices themselves do not get saturated. The upstream and downstream channels that are on one's segment can have capacity/congestion issues.]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23629982</guid>
<pubDate>Tue, 12 Jan 2010 12:01:16 EDT</pubDate>
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<title>msg deleted</title>
<link>http://www.dslreports.com/forum/msg-deleted-23629977</link>
<description><![CDATA[anon posted : <small>deleted by a moderator</small>]]></description>
<guid isPermaLink="true">http://www.dslreports.com/forum/msg-deleted-23629977</guid>
<pubDate>Tue, 12 Jan 2010 12:00:21 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23629675</link>
<description><![CDATA[fuziwuzi posted : <div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br>One user can't drive the node's utilization to the 70% or 80% necessary to trigger Comcast's management.  He can use 100% of his subscribed speed without triggering the management at all as long as the node isn't 70% utilized. </div>Then my node must be horribly overutilized because I can assure you if I attempt a file transfer at any time of day or night using full bandwidth my speeds will be cut within a few minutes and will remain so.  If I stop the transfer and wait, speeds will return to normal.  If I manually limit my transfer speeds to about 60-65% of maximum, my the transfers complete as normal.<br><br>That is my continued observations of the Comcast system and has been for the several months that the "upgrade" has been implemented in my area (getting the 12/2 upgrade from 6/1).  Comcast techs continue to say my line is "clean" and everything is functioning within specs.<br><br>So, then, my observations tell me one thing while you guys say something else.  I believe my own eyes over propaganda.<br><small>--<br>***************<br>I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.<br>  - Stephen Hawking</small>]]></description>
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<pubDate>Tue, 12 Jan 2010 11:08:48 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23629637</link>
<description><![CDATA[fuziwuzi posted : <div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br><div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Now, using your analogy, what if 9 of the customers aren't even using their system, say it is after hours and they've shut down.  But the 1 remaining user tries to do a data transfer using the full bandwidth of the system.  Under the Comcast method, that user would still be "packet prioritized" and his EFFECTIVE SPEED for that transfer would be attenuated.<br> </div>FAIL<br><br>That doesn't happen. The node is not saturated.<br>This is The Key Point you seem to want to ignore. <br> </div>Yes, it does happen.  That's the point YOU ignore.<br><small>--<br>***************<br>I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.<br>  - Stephen Hawking</small>]]></description>
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<pubDate>Tue, 12 Jan 2010 11:02:18 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23628158</link>
<description><![CDATA[espaeth posted : <div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br>Comcast's method is a kick toward the direction of user-vs-user fairness.  It could be refined more (shorter windows, better-engineered floors with more weighted queue handling) and really be an option worth considering. </div>It could be, but that's something even beyond the 80/20 rule in terms of effort to benefit.  If there were such a thing as an 99.999/0.001 rule, this would be a quintessential case.]]></description>
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<pubDate>Mon, 11 Jan 2010 23:54:21 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23626164</link>
<description><![CDATA[funchords posted : <div class="bquote"><small>said by <a href="/profile/878241" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=878241');">JohnInSJ</a>:</small><br><br><div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br><b>QoS</b> is connotative of using prioritization, but QoS is also connotative of guarantees of service, discrimination between different applications, meeting some specific quality goal (latency/jitter/throughput/reduced error rates).  <br> </div>The goal being: "always provide high availability to low-user customers." - These are the people paying the most money per bit, as it were. You want to keep those folks VERY happy. You care less about the folks that you are losing money on.<br><br>So yes, they want to maintain the Quality of Service for their cash cows. </div>No, that's not what I mean by "specific quality goal."  It's also not what I mean by "different applications." <br><br>I mean measurable and specific goals, such as, "Fairchild DBMS latency to Alpine office maintained below 70 ms. with a 95% confidence during the peak hour, and an overall average of all samples under 18 ms."   This might be one of a list of goals that mention other quality vectors such as speed or packet drops.  QoS Rules are the network's instructions designed to accomplish those goals.  <br><br>I understand your rationale because prioritization is a tool for achieving QoS goals and we tend to think of these in connected ways, but Comcast's method is pretty far from the way we should think about QoS.  <br><br>Comcast's method is a kick toward the direction of user-vs-user fairness.  It could be refined more (shorter windows, better-engineered floors with more weighted queue handling) and really be an option worth considering.  <br><small>--<br>Robb Topolski -= <A HREF="http://funchords.com/">funchords.com</a> =- District of Columbia  -- KJ7RL<br><i>Test your Broadband connection today!</i> -- &raquo;<A HREF="http://measurementlab.net/" >measurementlab.net/</A></small>]]></description>
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<pubDate>Mon, 11 Jan 2010 16:41:26 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23626038</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/340409" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=340409');">funchords</a>:</small><br><br><b>QoS</b> is connotative of using prioritization, but QoS is also connotative of guarantees of service, discrimination between different applications, meeting some specific quality goal (latency/jitter/throughput/reduced error rates).  <br> </div>The goal being: "always provide high availability to low-user customers." - These are the people paying the most money per bit, as it were. You want to keep those folks VERY happy. You care less about the folks that you are losing money on.<br><br>So yes, they want to maintain the Quality of Service for their cash cows.<br><br>It's QoS. You might not like how they define it, but it is.<br><br>Has anyone seen their speed drop below 128kbps during deprioritization? I've never actually experienced it myself.<br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
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<pubDate>Mon, 11 Jan 2010 16:24:33 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23626031</link>
<description><![CDATA[funchords posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Now, using your analogy, what if 9 of the customers aren't even using their system, say it is after hours and they've shut down.  But the 1 remaining user tries to do a data transfer using the full bandwidth of the system.  Under the Comcast method, that user would still be "packet prioritized" and his EFFECTIVE SPEED for that transfer would be attenuated. </div>One user can't drive the node's utilization to the 70% or 80% necessary to trigger Comcast's management.  He can use 100% of his subscribed speed without triggering the management at all as long as the node isn't 70% utilized.<br><br><div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>I'm not saying Comcast is wrong for doing this.  My only complaint is of the marketing and "propaganda" that tries to obfuscate reality.  I know all of the companies do this, I just wish someone would have the cojones to stop that practice and be upfront. </div>I don't know of anyone else doing Comcast's method (Anyone hear anything?), although Sandvine markets it.  <br><br>Even Comcast doesn't use it that often.  Comcast said in its trials that it does happen and for the most affected users (the heaviest users), it kicks in about 1% of the time for about 15 minutes.  Additionally, as it was pointed out to me in a a-hem moment, it's pretty doubtful that a lot of people will be on a node that is more than 70% of capacity and also be capable of maintaining speeds of more than 70% of their subscription.  Longer queues and dropped packets are likely to keep their throughputs below that 70% trigger. <br><small>--<br>Robb Topolski -= <A HREF="http://funchords.com/">funchords.com</a> =- District of Columbia  -- KJ7RL<br><i>Test your Broadband connection today!</i> -- &raquo;<A HREF="http://measurementlab.net/" >measurementlab.net/</A></small>]]></description>
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<pubDate>Mon, 11 Jan 2010 16:23:18 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23625875</link>
<description><![CDATA[funchords posted : Part of the problem is that Comcast's method is a bit unique: <b>All of the heavy user's traffic on a heavily utilized node is  de-prioritized from best-effort to scavenger class for 15-minute terms.</b>  <br><br>You have to thrash the definition of throttling pretty badly to call Comcast's method, "<b>throttling</b>."  Throttling means that you limit or manage the flow.  Comcast's method does neither.  If I have one complaint about Comcast's method, it's that it doesn't provide any assured floor to the affected customers.  For example, I think it would be a better system than present if the flow were managed to a minimum of 128 Kbps.  However, since the system so rarely kicks in (the thresholds are high and the system kicks in less than 1% of the time for any user), it's hard to complain strongly about the lack of a bandwidth floor. <br><br><b>QoS</b> is connotative of using prioritization, but QoS is also connotative of guarantees of service, discrimination between different applications, meeting some specific quality goal (latency/jitter/throughput/reduced error rates).  What Comcast does is more like anti-QoS because it temporarily reduces the priority of the affected customers' traffic so that they only get access to only that bandwidth that is left over by the rest of the users.<br><br>It's <b>not</b> throttling.  It's <b>not</b> QoS. <br><br>"Scavenger class'' (a genuine class of service currently in use, you should take no negative connotation) allows lower-priority users and applications to take advantage of unused network capacity.  It works like this: If all the normal packets have cleared the queue, then any unexpired  "scavenger class" packets may be routed and forwarded.  Normally, all the users crossing a particular router share the capabilities and restrictions of that connection.  With a "scavenger class," the normal packets are prioritized ahead of the scavenger packets.  A "scavenger class" user can use up to his full subscribed speed, if enough bandwidth is left over by other users.  However, a "scavenger class" user may also find that there is no bandwidth left over by other users and that all his packets get dropped.  There are legitimate uses for "scavenger class."  I'm not a big fan of Comcast's use of the idea (they get around calling it "scavenger class" by using terms like "priority best effort" over "best effort" but the functional result is exactly the same).  However, Comcast is both judicious in its application and has disclosed it fairly well.<br><small>--<br>Robb Topolski -= <A HREF="http://funchords.com/">funchords.com</a> =- District of Columbia  -- KJ7RL<br><i>Test your Broadband connection today!</i> -- &raquo;<A HREF="http://measurementlab.net/" >measurementlab.net/</A></small>]]></description>
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<pubDate>Mon, 11 Jan 2010 16:01:31 EDT</pubDate>
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<link>http://www.dslreports.com/forum/msg-deleted-23624578</link>
<description><![CDATA[anon posted : <small>deleted by a moderator</small>]]></description>
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<pubDate>Mon, 11 Jan 2010 12:43:53 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23624533</link>
<description><![CDATA[JohnInSJ posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Now, using your analogy, what if 9 of the customers aren't even using their system, say it is after hours and they've shut down.  But the 1 remaining user tries to do a data transfer using the full bandwidth of the system.  Under the Comcast method, that user would still be "packet prioritized" and his EFFECTIVE SPEED for that transfer would be attenuated.<br> </div>FAIL<br><br>That doesn't happen. The node is not saturated.<br>This is The Key Point you seem to want to ignore. <br><small>--<br>My place : &raquo;<A HREF="http://www.schettino.us" >www.schettino.us</A></small>]]></description>
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<pubDate>Mon, 11 Jan 2010 12:36:46 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23624303</link>
<description><![CDATA[AVonGauss posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Now, using your analogy, what if 9 of the customers aren't even using their system, say it is after hours and they've shut down.  But the 1 remaining user tries to do a data transfer using the full bandwidth of the system.  Under the Comcast method, that user would still be "packet prioritized" and his EFFECTIVE SPEED for that transfer would be attenuated.</div>Except, as has been pointed out several times by myself and others, that is not how the system works.  Even if your traffic has been prioritized as best effort (the lower of the two), if there is available overall bandwidth the effective transfer rate should not change.  If you are experiencing real-world transfer issues, you really would be better off creating a thread and providing more details about the actual issue you are experiencing.  If the system worked as you described above, this forum would be flooded with complaints.<br><br>Packet prioritization does not define arbitrary rates for transfers, it defines or shapes the effect of what happens when a physical or logical limit is reached, such as when the capacity of the DOCSIS channel is reached.  ]]></description>
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<pubDate>Mon, 11 Jan 2010 12:05:37 EDT</pubDate>
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<title>Re: Here we go again about bandwidth throttling ...</title>
<link>http://www.dslreports.com/forum/Re-Here-we-go-again-about-bandwidth-throttling-23624224</link>
<description><![CDATA[espaeth posted : <div class="bquote"><small>said by <a href="/profile/1227273" onClick="this.blur(); return popup(event,'/uidpop?ajh=1&uid=1227273');">fuziwuzi</a>:</small><br><br>Now, using your analogy, what if 9 of the customers aren't even using their system, say it is after hours and they've shut down.  But the 1 remaining user tries to do a data transfer using the full bandwidth of the system.  Under the Comcast method, that user would still be "packet prioritized" and his EFFECTIVE SPEED for that transfer would be attenuated.</div>That's the fundamental misunderstanding here, because what you are stating in this example is not correct.<br><br>The congestion management system assigns a priority for packets being pulled out of the transmit buffer for when the <b>SHARED</b> channel becomes saturated.   If there is no congestion, there is no queuing, and even if you mark packets down from Priority Best Effort to Best Effort there is <u>absolutely no impact to throughput when the line is otherwise free of congestion</u>.   <br><br>It's entirely possible for you to run your connection at 100% of your subscribed line rate even with the congestion management system in effect if the traffic on your DOCSIS segment has the capacity to allow for it.]]></description>
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<pubDate>Mon, 11 Jan 2010 11:55:02 EDT</pubDate>
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