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Date:      Thu, 14 Mar 2013 13:56:35 +0000
From:      "Eggert, Lars" <lars@netapp.com>
To:        "melifaro@freebsd.org" <melifaro@freebsd.org>
Cc:        "<freebsd-ipfw@freebsd.org>" <freebsd-ipfw@freebsd.org>
Subject:   Re: kern/121122: [ipfw] [patch] add support to ToS IP PRECEDENCE fields
Message-ID:  <C8392884-7FAE-4894-965E-6FC1DB7C8CAF@netapp.com>
In-Reply-To: <201303141348.r2EDmpTB067069@freefall.freebsd.org>
References:  <201303141348.r2EDmpTB067069@freefall.freebsd.org>

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Hi,

interpreting these bits as a TOS field has been deprecated since RFC2474 wa=
s published in 1998. Since then, we've been having a DSCP codepoint and ECN=
 bits in the IP header.

It would be actively harmful to add TOS byte support 15 years after it was =
deprecated. Read http://en.wikipedia.org/wiki/Type_of_service

Lars

On Mar 14, 2013, at 9:48, melifaro@freebsd.org wrote:

> Synopsis: [ipfw] [patch] add support to ToS IP PRECEDENCE fields
>=20
> Responsible-Changed-From-To: freebsd-ipfw->melifaro
> Responsible-Changed-By: melifaro
> Responsible-Changed-When: Thu Mar 14 13:48:37 UTC 2013
> Responsible-Changed-Why:=20
> Take.
>=20
> http://www.freebsd.org/cgi/query-pr.cgi?pr=3D121122
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