IP DSCP across the Internet
nanog at ics-il.net
Thu May 7 11:46:00 UTC 2015
That sounds like a rather poor implementation. What if they had more than one VoIP call?
Seems like this thread has more FUD than real examples.
Intelligent Computing Solutions
----- Original Message -----
From: "Mikael Abrahamsson" <swmike at swm.pp.se>
To: "Mark Tinka" <mark.tinka at seacom.mu>
Cc: "nanog list" <nanog at nanog.org>
Sent: Thursday, May 7, 2015 4:32:52 AM
Subject: Re: IP DSCP across the Internet
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 at swm.pp.se
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