netdev - Re: [RFC] Make the ip6_tunnel reflect the true mtu.

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Date:	Tue, 26 Oct 2010 10:44:52 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	Anders.Franzen@...csson.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [RFC] Make the ip6_tunnel reflect the true mtu.

From: Anders.Franzen@...csson.com
Date: Tue, 19 Oct 2010 16:38:43 +0200

> From: Anders Franzen <anders.franzen@...csson.com>
> 
> The ip6_tunnel always assumes it consumes 40 bytes (ip6 hdr) of the mtu of the
> underlaying device. So for a normal ethernet bearer, the mtu of the ip6_tunnel is
> 1460.
> However, when creating a tunnel the encap limit option is enabled by default, and it
> consumes 8 bytes more, so the true mtu shall be 1452.
> 
> I dont really know if this breaks some statement in some RFC, so this is a request for
> comments.

This patch looks fine to me, but please fully resubmit this with a
proper "Signed-off-by: " tag as per Documentation/SubmittingPatches

Thanks.
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