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Date:	Sun, 10 Aug 2014 22:37:12 +0200
From:	Hannes Frederic Sowa <>
To:	Roy Marples <>
	"David S. Miller\" <>, Alexey Kuznetsov "
	 "<>, Hideaki YOSHIFUJI <>, "
	 Patrick McHardy <>
Subject: Re: [PATCH] ipv6: do not add link-local address if one already


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:

This was recently implemented just for this specific case.


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