From owner-freebsd-questions@FreeBSD.ORG Tue Jan 21 15:37:34 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E1D62144 for ; Tue, 21 Jan 2014 15:37:33 +0000 (UTC) Received: from mail-qa0-x230.google.com (mail-qa0-x230.google.com [IPv6:2607:f8b0:400d:c00::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A0A8B195C for ; Tue, 21 Jan 2014 15:37:33 +0000 (UTC) Received: by mail-qa0-f48.google.com with SMTP id f11so6611559qae.21 for ; Tue, 21 Jan 2014 07:37:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=rZO190dAXHNrWGzkWTHLTkbDQBvGpm7OjQwQC3kCPfg=; b=nM2XiCp5M+tB+Itkid3tjLFnt0xJLipZaOokQSQUtaKdve0V5/BOfj9V6ODQfsdKmw BHjA1UF0GOdrxgJSkaBYBuG3nZHCHNQAZcgmctMXjBGQotqhAwG2N8adSdx02PdaNbmh LwhICXWT+JiXuW4sPqQtZURsQFn2TyzANXSzM5V2pD0VWVq8HfSWw3Igud/sQEXy6+CA 45j4PSvAsfExjG0CNnpTGuAKd2Bplj4y4UW+aSdVyrwsThJSlxHEq5Hl41ZVVge5WE76 tXMvq1KmgVbimDG0/Jdf1xxGdYVk/UVFsntmhD9nKZmN6OhPwT47pUuHZI3S35UQb4O5 t/ng== MIME-Version: 1.0 X-Received: by 10.140.93.130 with SMTP id d2mr35706909qge.41.1390318652877; Tue, 21 Jan 2014 07:37:32 -0800 (PST) Received: by 10.96.37.227 with HTTP; Tue, 21 Jan 2014 07:37:32 -0800 (PST) In-Reply-To: References: Date: Tue, 21 Jan 2014 15:37:32 +0000 Message-ID: Subject: Re: IPV6 and disabling DAD From: krad To: FreeBSD Questions Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jan 2014 15:37:34 -0000 after reading the source it seems the following tunable is what i needed net.inet6.ip6.dad_count=0 On 21 January 2014 12:47, krad wrote: > To cut a long story short, I have a virtualized environment (vbox ontop of > solaris11) with a couple of freebsd vms. The ipv6 address assignment keeps > failing due to duplicated addresses. From what I can see this is basically > due to multicast frames being looped back to the guest OS. In my simplistic > mind i should just disable dad and do it all manually. I cant find how to > do this though. I know this isnt a bsd thing as the linux guests have the > same issue. > > kernel: Cannot enable an interface with a link-local address marked > duplicate. > > kernel: mplex: DAD detected duplicate IPv6 address > fe80:4::a00:27ff:fe99:3372: NS in/out=5/1, NA in=0 > carrera kernel: mplex: DAD complete for fe80:4::a00:27ff:fe99:3372 - > duplicate found > >