[144345] in North American Network Operators' Group
Re: Silently dropping QoS marked packets on the greater Internet
daemon@ATHENA.MIT.EDU (Mark Tinka)
Fri Sep 9 01:13:25 2011
From: Mark Tinka <mtinka@globaltransit.net>
To: nanog@nanog.org
Date: Fri, 9 Sep 2011 13:12:49 +0800
In-Reply-To: <A92EB23D9E64824189C99C5ABF833104197EA51D@mbx024-e1-nj-2.exch024.domain.local>
Reply-To: mtinka@globaltransit.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Friday, September 02, 2011 10:49:32 PM Jeff Saxe wrote:
> Seriously, I would expect that most public Internet
> carriers, unless you paid them extra fees to pay
> attention to the DSCP markings, would completely ignore
> them and treat it all as best-effort traffic, right up
> to and including the last-mile circuit that should be
> the congestion point at which QoS would be most useful
> to differentiate. I don't think it would be the stated
> policy of any public ISP to drop other-than-zero-marked
> packets, especially if it's a transit somewhere that's
> out of reach of either you or the other customer you're
> trying to reach.
I think that DSCP 0 is safest for Internet traffic. As such,=20
if a network is going to deploy QoS, they would do well to=20
implement this safety net for Internet traffic so that said=20
traffic doesn't fall victim to restrictive policies of non-0=20
DSCP strategies, or just as equally, doesn't get scheduled=20
with a better advantage than is necessary, as that would=20
cost money.
Mark.
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