From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [Bug 47021] New: kernel panic with l2tpv3 & mtu > 1500
Date: Tue, 04 Sep 2012 22:57:14 +0200
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To: Stephen Hemminger <shemminger@vyatta.com>
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On Tue, 2012-09-04 at 12:54 -0700, Stephen Hemminger wrote:

> 
> I guess nobody ever looked inside this code. That seems like an obvious bug.

It seems that l2tp lacks ECN support as well.