netdev - Re: [PATCH net-2.6][NEIGH] Updating affected neighbours when about MAC address change

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Message-ID: <31436f4a0712230521m2a2745fcse56ba93529fd8034@mail.gmail.com>
Date:	Sun, 23 Dec 2007 15:21:04 +0200
From:	"David Shwatrz" <dshwatrz@...il.com>
To:	"YOSHIFUJI Hideaki / 吉藤英明" 
	<yoshfuji@...ux-ipv6.org>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH net-2.6][NEIGH] Updating affected neighbours when about MAC address change

Yoshfuji,

Thanks, you are right ! soon I will send the patches.

Thanks !
DS


On Dec 23, 2007 3:13 PM, YOSHIFUJI Hideaki / 吉藤英明
<yoshfuji@...ux-ipv6.org> wrote:
> In article <31436f4a0712230504x7b0b4f38i8f69a7a825bcc14b@...l.gmail.com> (at Sun, 23 Dec 2007 15:04:37 +0200), "David Shwatrz" <dshwatrz@...il.com> says:
>
> > Hello,
> >
> >
> > >You should iterate all of ifa_list (for IPv4) / addr_list (for IPv6).
> > > For IPv6, we also have anycast (maintained by ac_list) as well.
> >
> > I am not sure that we need to iterate all of ifa_list in IPv4.
> > The reason is that we end with arp_send, and it initiates a broadcast.
> > So all neighbours will receive it and update their arp tables
> > accordingly.
> > The dest hw in the arp_send is NULL according to this patch ; this means that
> > we will assign dev->broadcast to dest_hw  in apr_create().
> >
> > It seems to me there's no reason to send more than one broadcast.
>
> Urgh? what is happend if you have multiple IPv4 addresses on the device?
>
>
> > In IPv6, I need to check, since it is multicast.
>
> Please read RFC2461 Section 7.2.6.  In short we should send a few
> unsolicited NA, but I think you can start from sending once per an
> address.
>
> --yoshfuji
>
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