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Message-Id: <200901091002.07224.remi.denis-courmont@nokia.com> Date: Fri, 9 Jan 2009 10:02:06 +0200 From: "Rémi Denis-Courmont" <remi.denis-courmont@...ia.com> To: "ext Stephen Hemminger" <shemminger@...tta.com> Cc: David Miller <davem@...emloft.net>, yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org Subject: Re: [PATCH] ipv6: address preservation on link down On Friday 09 January 2009 03:14:15 ext Stephen Hemminger, you wrote: > When an interface goes down, IPV6 deletes all addresses unlike IPV4. This > is a problem since it can break routing protocols and other applications. > It looks like this was done to handle DAD, but is a big stick solution when > other code is possible. > > The following patch changes the behaviour to delete link local addresses > but keep all configured addresses and restart DAD when interface comes back > up. Let alone the backward compatibility problem for a minute. I have two _other_ problems with this: 1/ If DAD should fail when the interface is brought back up, wouldn't all the EAU-64 autoconfigured address become invalid, rather than just the link-local one? 2/ In some case the link-local address is assigned by userland, no different from the other ones. At least miredo is behaving this way. -- Rémi Denis-Courmont Maemo Software, Nokia Devices R&D -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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