Re: [aqm] [Bloat] ping loss "considered harmful"
Rich Brown <richb.hanover@gmail.com> Thu, 05 March 2015 19:50 UTC
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From: Rich Brown <richb.hanover@gmail.com>
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Date: Thu, 05 Mar 2015 14:50:33 -0500
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To: curtis@ipv6.occnc.com
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Cc: "aqm@ietf.org" <aqm@ietf.org>, Dave Taht <dave.taht@gmail.com>, "cerowrt-devel@lists.bufferbloat.net" <cerowrt-devel@lists.bufferbloat.net>, bloat <bloat@lists.bufferbloat.net>
Subject: Re: [aqm] [Bloat] ping loss "considered harmful"
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On Mar 5, 2015, at 1:56 PM, Curtis Villamizar <curtis@ipv6.occnc.com> wrote: > In message <CAA93jw4F7iffbTRUt5RFsF0wgoOAXPUVHdu7JESVq4uM17cm7A@mail.gmail.com> > Dave Taht writes: > >> My point was A), I have seen tons of shapers out there that actually >> prioritize ping over other traffic. I figure everyone here will agree >> that is a terrible practice, but I can certainly say it exists, as it >> is a dumb mistake replicated in tons of shapers I have seen... that >> makes people in marketing happy. >> >> Already put up extensive commentary on that bit of foolishness on >> "wondershaper must die". > > > Its possible to detect such a shaper prioritizing ICMP echo/reply by > doing a an HTTP fetch concurrent with a ping... For an easy (but imprecise) way test the HTTP response times, try Blip - http://gfblip.appspot.com/ (or read about it on github: https://github.com/apenwarr/blip) Blip sends short http requests to a couple hosts and measures the response time of the error pages. > and then and see if the > TCP data packet get significantly delayed relative to the ICMP echo > and echo reply packets. You'd have to do a tcpdump and match the ICMP > echo to the echo reply and see if later the ICMP RTT looks very > different from the TCP RTT. It might be that the SYN and SYN ACK are > not delayed but the plain old TCP date packets are. > > If anyone has a small amount of spare time and wants to put together a > shell script its certainly doable. > > Curtis > _______________________________________________ > Bloat mailing list > Bloat@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/bloat
- [aqm] ping loss "considered harmful" Dave Taht
- Re: [aqm] ping loss "considered harmful" Andrew Mcgregor
- Re: [aqm] ping loss "considered harmful" Mikael Abrahamsson
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… David Lang
- Re: [aqm] ping loss "considered harmful" Brian Trammell
- Re: [aqm] ping loss "considered harmful" Mikael Abrahamsson
- Re: [aqm] ping loss "considered harmful" Dave Dolson
- Re: [aqm] ping loss "considered harmful" Andrew Mcgregor
- Re: [aqm] [Cerowrt-devel] [Bloat] ping loss "cons… dpreed
- Re: [aqm] [Bloat] ping loss "considered harmful" Jonathan Morton
- Re: [aqm] [Bloat] ping loss "considered harmful" Brian Trammell
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… David Lang
- Re: [aqm] ping loss "considered harmful" Wes Felter
- Re: [aqm] ping loss "considered harmful" Dave Dolson
- Re: [aqm] ping loss "considered harmful" Dave Taht
- Re: [aqm] ping loss "considered harmful" David Lang
- Re: [aqm] ping loss "considered harmful" Joe Touch
- Re: [aqm] ping loss "considered harmful" David Lang
- Re: [aqm] ping loss "considered harmful" Joe Touch
- Re: [aqm] ping loss "considered harmful" David Lang
- Re: [aqm] ping loss "considered harmful" Andrew Mcgregor
- Re: [aqm] ping loss "considered harmful" Wes Felter
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… Valdis.Kletnieks
- Re: [aqm] ping loss "considered harmful" Fred Baker (fred)
- Re: [aqm] [Bloat] ping loss "considered harmful" Wesley Eddy
- Re: [aqm] [Bloat] ping loss "considered harmful" Fred Baker (fred)
- Re: [aqm] [Bloat] ping loss "considered harmful" Dave Taht
- Re: [aqm] ping loss "considered harmful" Mikael Abrahamsson
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… Mikael Abrahamsson
- Re: [aqm] [Cerowrt-devel] [Bloat] ping loss "cons… dpreed
- Re: [aqm] [Cerowrt-devel] [Bloat] ping loss "cons… Mikael Abrahamsson
- Re: [aqm] [Bloat] ping loss "considered harmful" Curtis Villamizar
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… Dave Taht
- Re: [aqm] [Bloat] ping loss "considered harmful" Rich Brown
- Re: [aqm] [Cerowrt-devel] ping loss "considered h… Matt Taggart