[179777] in North American Network Operators' Group
Re: IP DSCP across the Internet
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Thu May 7 05:32:56 2015
X-Original-To: nanog@nanog.org
Date: Thu, 7 May 2015 11:32:52 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Mark Tinka <mark.tinka@seacom.mu>
In-Reply-To: <5549A9EE.8040805@seacom.mu>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Wed, 6 May 2015, Mark Tinka wrote:
> With color-aware policing toward a customer in Uganda, any traffic
> coming from that peer in South Africa was getting dropped toward that
> customer in Uganda. After a very odd sequence of troubleshooting events,
> we found that the AF DSCP alues being set by the peer in South Africa
> (and us passing them due to the old kit not being able to remark on
> ingress) was causing the color-aware policer in Uganda to drop traffic
> toward the customer there.
I have heard similar stories where game traffic ended up in a 100
kilobit/s VoIP queue which worked fine until there were a lot of nearby
players in the game, then things started working very badly. Also nice
corner case :P
So yes, setting all external Internet traffic to DSCP=BE (0) is something
one wants to do.
--
Mikael Abrahamsson email: swmike@swm.pp.se
