From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] ipv6: Use 1280 as min MTU for ipv6 forwarding
Date: Fri, 26 Feb 2010 03:59:47 -0800 (PST)
Message-ID: <20100226.035947.242568281.davem@davemloft.net>
References: <20100226092752.GA5969@babylon>
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From: Ulrich Weber <uweber@astaro.com>
Date: Fri, 26 Feb 2010 10:27:52 +0100

> Clients will set their MTU to 1280 if they receive a
> ICMPV6_PKT_TOOBIG message with an MTU less than 1280.
> 
> To allow encapsulating of packets over a 1280 link
> we should always accept packets with a size of 1280
> for forwarding even if the path has a lower MTU and
> fragment the encapsulated packets afterwards.
> 
> In case a forwarded packet is not going to be encapsulated
> a ICMPV6_PKT_TOOBIG msg will still be send by ip6_fragment()
> with the correct MTU.
> 
> Signed-off-by: Ulrich Weber <uweber@astaro.com>

Patch does not apply to net-next-2.6, icmpv6_send() no longer
takes the final 'dev' argument.