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Date: Tue, 06 Dec 2011 18:31:21 +0400
From: Sergey Matveychuk <sem@FreeBSD.org>
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To: alan yang <alancyang@gmail.com>
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Cc: freebsd-ipfw@freebsd.org
Subject: Re: ipfw dscp support
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06.12.2011 5:20, alan yang wrote:
> Hello,
>
> Running FreeBSD 8.2 release with ipfw command: "ipfw add 10 count ip
> from any to any dscp AF11" gives:
> ipfw: unrecognized option [49] dscp
>
> wonder people could shed some light if 8.2 release has ipfw support of dscp?
>
> o kern/102471  ipfw       [ipfw] [patch] add tos and dscp support
>
> above is from 2011-04-11 FreeBSD bugmaster current problem report,
> Wonder the patch is available for 8.2?

The PR you mentioned is in open state. It means it never been committed. 
Use man ipfw to find out options it supports.