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Date:      Sun, 31 Dec 2000 15:33:36 -0500 (EST)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        "C. Stephen Gunn" <csg@waterspout.com>
Cc:        Andrea Franceschini <andrea@cs.tin.it>, Ferdinand Goldmann <ferdl@atommuell.oeh.uni-linz.ac.at>, "freebsd-net@FreeBSD.ORG" <freebsd-net@FreeBSD.ORG>
Subject:   Re: Problems with VLAN and natd.
Message-ID:  <200012312033.PAA08488@khavrinen.lcs.mit.edu>
In-Reply-To: <20001230004646.A5433@waterspout.com>
References:  <Pine.BSF.4.31.0012290955380.80180-100000@atommuell.oeh.uni-linz.ac.at> <3A4CC2E7.DCA1C60C@cs.tin.it> <20001230004646.A5433@waterspout.com>

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<<On Sat, 30 Dec 2000 00:46:46 -0500, "C. Stephen Gunn" <csg@waterspout.com> said:

> Yes, ifconfig <if> mtu 1500 is what you want.

Actually, no, it's not what you want (although the underlying code is
broken enough to let it ``work'' anyway).  What you want is to fix the
parent network interface driver to indicate its readiness to receive
1522-octet frames by setting its if_data.ifi_hdrlen field to 18 rather
than 14.

-GAWollman



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