Date: Mon, 25 Jun 2018 12:56:54 -0400 From: Viktor Dukhovni <freebsd@dukhovni.org> To: freebsd-net@freebsd.org Subject: Re: [PATCH]: The 6to4 stf0 interface flapping in/out of tentative in FreeBSD 11 Message-ID: <AF7AEDE9-2573-43E1-9110-68A2717CEEBC@dukhovni.org> In-Reply-To: <8fe71247-a9a4-e3cb-3e4a-03852307f080@yandex.ru> References: <CEBB4E6F-4D5F-491F-8C81-C9F81325078B@dukhovni.org> <20171106042248.GL3322@mournblade.imrryr.org> <20180622163812.GA17559@mournblade.imrryr.org> <8fe71247-a9a4-e3cb-3e4a-03852307f080@yandex.ru>
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> On Jun 22, 2018, at 1:41 PM, Andrey V. Elsukov <bu7cher@yandex.ru> wrote: > > Your change looks reasonable due to IPv6 DAD procedure does check for > presence of IFF_DRV_RUNNING flag. But actually it seems the right > solution should be disabling DAD for if_stf(4) interface. > IPv6 DAD requires that given interface should be multicast capable, but > for if_stf(4) it is not true. > Will it help if you use `ifconfig stf0 inet6 no_dad` before assigning > IPv6 address? For the record, per off-list email, just disabling DAD was not enough. Anything else you'd like me to try? -- Viktor.
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