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X-Original-To: nanog@nanog.org From: John van Oppen <jvanoppen@spectrumnet.us> To: Mike Hammett <nanog@ics-il.net>, nanog list <nanog@nanog.org> Date: Thu, 7 May 2015 20:02:04 +0000 In-Reply-To: <11937411.8601.1430999138395.JavaMail.mhammett@ThunderFuck> Errors-To: nanog-bounces@nanog.org seems pretty real to me, I know we (AS11404) mark to zero on ingress... I= think that is the typical case otherwise people would just tag their flood= style ddos traffic as max and try to take out everything.=0A= =0A= John =0A= ________________________________________=0A= From: NANOG [nanog-bounces@nanog.org] on behalf of Mike Hammett [nanog@ics-= il.net]=0A= Sent: Thursday, May 07, 2015 4:46 AM=0A= To: nanog list=0A= Subject: Re: IP DSCP across the Internet=0A= =0A= That sounds like a rather poor implementation. What if they had more than o= ne VoIP call?=0A= =0A= Seems like this thread has more FUD than real examples.=0A= =0A= =0A= =0A= =0A= -----=0A= Mike Hammett=0A= Intelligent Computing Solutions=0A= http://www.ics-il.com=0A= =0A= ----- Original Message -----=0A= =0A= From: "Mikael Abrahamsson" <swmike@swm.pp.se>=0A= To: "Mark Tinka" <mark.tinka@seacom.mu>=0A= Cc: "nanog list" <nanog@nanog.org>=0A= Sent: Thursday, May 7, 2015 4:32:52 AM=0A= Subject: Re: IP DSCP across the Internet=0A= =0A= On Wed, 6 May 2015, Mark Tinka wrote:=0A= =0A= > With color-aware policing toward a customer in Uganda, any traffic=0A= > coming from that peer in South Africa was getting dropped toward that=0A= > customer in Uganda. After a very odd sequence of troubleshooting events,= =0A= > we found that the AF DSCP alues being set by the peer in South Africa=0A= > (and us passing them due to the old kit not being able to remark on=0A= > ingress) was causing the color-aware policer in Uganda to drop traffic=0A= > toward the customer there.=0A= =0A= I have heard similar stories where game traffic ended up in a 100=0A= kilobit/s VoIP queue which worked fine until there were a lot of nearby=0A= players in the game, then things started working very badly. Also nice=0A= corner case :P=0A= =0A= So yes, setting all external Internet traffic to DSCP=3DBE (0) is something= =0A= one wants to do.=0A= =0A= --=0A= Mikael Abrahamsson email: swmike@swm.pp.se=0A= =0A=
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