Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Raymond Dijkxhoorn
Hi! - do ISPs typically use token bucket filters with large bursts to shape traffic? - what kind of burst sizes and latencies/limits are typically used for the filter? You will definitely have to account for latency. For emulating cable traffic, latencies (in the USA) will be about 60-80ms

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Dave Hart
On Tue, May 4, 2010 at 08:54 UTC, Raymond Dijkxhoorn wrote, quoting Patrick: For emulating cable traffic, latencies (in the USA) will be about 60-80ms to typical sites. [...] For DSL, I seem to recall latency being about 90-110ms (note, I haven't used DSL in many years). [...] The latency i

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Raymond Dijkxhoorn
Hi! Either you're looking only at the loop contribution, or you're in the SF bay area and nearly every typical site is available locally. Here in the relatively backwater Seattle suburbs, unless it's served by Microsoft or a content distribution network, there are substantial latencies to

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Marshall Eubanks
On May 4, 2010, at 8:02 AM, Dave Hart wrote: On Tue, May 4, 2010 at 08:54 UTC, Raymond Dijkxhoorn wrote, quoting Patrick: For emulating cable traffic, latencies (in the USA) will be about 60-80ms to typical sites. [...] For DSL, I seem to recall latency being about 90-110ms (note, I

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Chris Boyd
On May 4, 2010, at 7:27 AM, Marshall Eubanks wrote: I am not sure what the point is in mixing in speed of light latency. If your typical sites are, say, Indian cricket blogs, you will typically have a high latency from the US. What does that tell you about your DSL or Cable system, except

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread isabel dias
... - Original Message From: Chris Boyd cb...@gizmopartners.com To: NANOG nanog@nanog.org Sent: Tue, May 4, 2010 2:19:39 PM Subject: Re: Emulating ADSL bandwidth shaping On May 4, 2010, at 7:27 AM, Marshall Eubanks wrote: I am not sure what the point is in mixing in speed of light latency

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread isabel dias
Is cable better for gamming? - Original Message From: isabel dias isabeldi...@yahoo.com To: Chris Boyd cb...@gizmopartners.com; NANOG nanog@nanog.org Sent: Tue, May 4, 2010 2:41:48 PM Subject: Re: Emulating ADSL bandwidth shaping same as in the HFC and QAM modulation values and so

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Valdis . Kletnieks
On Tue, 04 May 2010 06:42:59 PDT, isabel dias said: Is cable better for gaming? Depends on the game and the gamer. Personally, it doesn't matter to me, as even if I was on my employer's 10GE uplink, I'd still lose to some snot-nosed brat with fast reflexes on a 56kb modem. So till they invent

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Mikael Abrahamsson
On Tue, 4 May 2010, Chris Boyd wrote: Most of the ADSL installations I've seen in SBC 13 state area had interleaving turned on, which significantly increases latency. I suspect that's why many cable MSOs in the same territory have cable is better for gaming marketing campaigns running all

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Chris Boyd
On May 4, 2010, at 8:42 AM, isabel dias wrote: Is cable better for gamming? All the LAN party places I know of use Metro Ethernet solutions. Gamers like low ping times to their servers, and are willing to spend $$ to get them. So if your target market includes people who play a lot of

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Scott Weeks
--- cb...@gizmopartners.com wrote: From: Chris Boyd cb...@gizmopartners.com On May 4, 2010, at 7:27 AM, Marshall Eubanks wrote: I am not sure what the point is in mixing in speed of light latency. If your typical sites are, say, Indian cricket blogs, you will typically have a high latency

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Mikael Abrahamsson
On Tue, 4 May 2010, Scott Weeks wrote: Interleaved turned on to correct errors. This adds ~25msec between the CPE and the nearest router. Sometimes folks ask for it to be changed to Fast. We explain that errors may cause resyncs to happen and then make the change if the customer still

RE: Emulating ADSL bandwidth shaping

2010-05-04 Thread Frank Bulk - iName.com
: Patrick Giagnocavo [mailto:patr...@zill.net] Sent: Monday, May 03, 2010 10:19 PM To: Srikanth Sundaresan; NANOG Subject: Re: Emulating ADSL bandwidth shaping Srikanth Sundaresan wrote: I'm trying to model ADSL access link bandwidth shaping. With a link of 18Mbps, I'm using a token bucket filter (tc

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Scott Weeks
--- swm...@swm.pp.se wrote: From: Mikael Abrahamsson swm...@swm.pp.se On Tue, 4 May 2010, Scott Weeks wrote: Interleaved turned on to correct errors. This adds ~25msec between the CPE and the nearest router. Sometimes folks ask for it to be changed to Fast. We explain that errors may

Re: Emulating ADSL bandwidth shaping

2010-05-04 Thread Mark Smith
On Tue, 4 May 2010 16:44:06 +0200 (CEST) Mikael Abrahamsson swm...@swm.pp.se wrote: On Tue, 4 May 2010, Chris Boyd wrote: Most of the ADSL installations I've seen in SBC 13 state area had interleaving turned on, which significantly increases latency. I suspect that's why many cable

Re: Emulating ADSL bandwidth shaping

2010-05-03 Thread Patrick Giagnocavo
Srikanth Sundaresan wrote: I'm trying to model ADSL access link bandwidth shaping. With a link of 18Mbps, I'm using a token bucket filter (tc + netem) to model 10Mbps, 8Mbps and 2Mbps access plans. I have a couple of questions: - do ISPs typically use token bucket filters with large bursts

Re: Emulating ADSL bandwidth shaping

2010-05-03 Thread Aria Stewart
On May 3, 2010, at 9:19 PM, Patrick Giagnocavo wrote: - do ISPs typically use token bucket filters with large bursts to shape traffic? - what kind of burst sizes and latencies/limits are typically used for the filter? You will definitely have to account for latency. For emulating