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Date: Mon, 11 Aug 2014 02:11:40 +0200 From: Hannes Frederic Sowa <hannes@...hat.com> To: Roy Marples <roy@...ples.name> Cc: netdev@...r.kernel.org, "\"David S. Miller\\" <davem@...emloft.net>, "Alexey Kuznetsov \"\"" <kuznet@....inr.ac.ru>, Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>, Patrick@...ples.name, McHardy@...ples.name, kaber@...sh.net Subject: Re: [PATCH] ipv6: do not add link-local address if one already exists On Mo, 2014-08-11 at 00:05 +0000, Roy Marples wrote: > Hi > > On 2014-08-10 20:37, Hannes Frederic Sowa wrote: > > On So, 2014-08-10 at 19:56 +0000, Roy Marples wrote: > >> Currently the kernel will always add an IPv6 link-local address > >> based on the hardware address when the interface is brought up. > >> This is probably based on the assumption that userland would > >> never add one before the interface is brought up. > >> > >> However, one at least one userland application (dhcpcd) does this so > >> it can implement RFC7217 which can be used for link-local addresses > >> as well. > >> > >> Attached is a patch which checks to see if a link-local address exists > >> before indiscriminately adding one. > > > > Please have a look at: > > https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=bc91b0f07ada5535427373a4e2050877bcc12218 > > > > This was recently implemented just for this specific case. > > Is that tunable available in /proc or /sys? > I'm not overly keen on adding a netlink call just for that in dhcpcd, it > would be a lot of bloat compared to the kernel patch. Can you call iproute via a script? Would that fit your needs? https://git.kernel.org/cgit/linux/kernel/git/shemminger/iproute2.git/commit/?h=net-next&id=ff7c20844049be836c10087cb2418b99ff36ca2b Bye, Hannes -- 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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