From owner-freebsd-net@FreeBSD.ORG  Mon Feb 26 10:48:53 2007
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Date: Mon, 26 Feb 2007 11:48:55 +0100
From: Andre Oppermann <andre@freebsd.org>
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To: aditya kiran <adityaa.kiran@gmail.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: PMTU Discovery - How to enable
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aditya kiran wrote:
> Hi,
> I would like to know how to enable Path MTU Discovery in Free BSD 6.0.
> Do I need to apply some patch to get it work?

No patch is needed.  PMTU discovery should be enabled by default on all
FreeBSD machines.  You can check with "sysctl net.inet.tcp.path_mtu_discovery".

-- 
Andre