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Message-ID: <20131107011640.GE8144@order.stressinduktion.org>
Date:	Thu, 7 Nov 2013 02:16:40 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	"Steinar H. Gunderson" <sgunderson@...foot.com>
Cc:	netdev@...r.kernel.org, ayourtch@...il.com
Subject: Re: Linux sends IPv6 NS packets with the link-local address

On Thu, Nov 07, 2013 at 01:56:15AM +0100, Steinar H. Gunderson wrote:
> On Thu, Nov 07, 2013 at 01:46:11AM +0100, Hannes Frederic Sowa wrote:
> > Problem was, if we enqueue a packet to the resolving queue we use those
> > packets source address as the address we use as the source address. This
> > patch chooses the last enqueued skb's source address to do the resolving
> > thus switching over to a global address much more early (hopefully). I
> > have seen this problem with routers doing uRPF on the source address of
> > arp packets, too.
> > 
> > Does this happen when you configure addresses? Do your addresses have
> > a short lifetime advertised by radvd etc?
> 
> There are no autoconfigured addresses on the machine; statically set plus
> link-layer only. It does _serve_ RA for another VLAN, though (it does
> 802.1q, some tunnels, and some BGP).

Ok, still the patch should improve the situation if the first packet queued up
used the ll-address as source.

Greetings,

  Hannes

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