From owner-freebsd-net@FreeBSD.ORG Mon Jul 1 00:19:14 2013 Return-Path: Delivered-To: freebsd-net@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 309E7C46 for ; Mon, 1 Jul 2013 00:19:14 +0000 (UTC) (envelope-from hrs@FreeBSD.org) Received: from mail.allbsd.org (gatekeeper.allbsd.org [IPv6:2001:2f0:104:e001::32]) by mx1.freebsd.org (Postfix) with ESMTP id 9F0901136 for ; Mon, 1 Jul 2013 00:19:13 +0000 (UTC) Received: from alph.d.allbsd.org (p3086-ipbf906funabasi.chiba.ocn.ne.jp [122.26.46.86]) (authenticated bits=128) by mail.allbsd.org (8.14.5/8.14.5) with ESMTP id r610Isjx071962 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 1 Jul 2013 09:19:05 +0900 (JST) (envelope-from hrs@FreeBSD.org) Received: from localhost (localhost [127.0.0.1]) (authenticated bits=0) by alph.d.allbsd.org (8.14.5/8.14.5) with ESMTP id r610IqUE043060; Mon, 1 Jul 2013 09:18:54 +0900 (JST) (envelope-from hrs@FreeBSD.org) Date: Mon, 01 Jul 2013 09:18:00 +0900 (JST) Message-Id: <20130701.091800.431052507291100682.hrs@allbsd.org> To: zbeeble@gmail.com Subject: Re: Duplicate Address Detection misfire? From: Hiroki Sato In-Reply-To: References: X-PGPkey-fingerprint: BDB3 443F A5DD B3D0 A530 FFD7 4F2C D3D8 2793 CF2D X-Mailer: Mew version 6.5 on Emacs 24.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Multipart/Signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="--Security_Multipart(Mon_Jul__1_09_18_00_2013_865)--" Content-Transfer-Encoding: 7bit X-Virus-Scanned: clamav-milter 0.97.4 at gatekeeper.allbsd.org X-Virus-Status: Clean X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (mail.allbsd.org [133.31.130.32]); Mon, 01 Jul 2013 09:19:05 +0900 (JST) X-Spam-Status: No, score=-89.3 required=13.0 tests=CONTENT_TYPE_PRESENT, DIRECTOCNDYN,DYN_PBL,ONLY1HOPDIRECT,QENCPTR1,RCVD_IN_PBL,SAMEHELOBY2HOP, USER_IN_WHITELIST autolearn=no version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on gatekeeper.allbsd.org Cc: freebsd-net@FreeBSD.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Jul 2013 00:19:14 -0000 ----Security_Multipart(Mon_Jul__1_09_18_00_2013_865)-- Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Zaphod Beeblebrox wrote in : zb> I have a FreeBSD 9.1-RELEASE vmware guest running. It is using the zb> "bridged" type of networking with VMWare. It gets it's IPv4 address from zb> DHCP (successfully) and then fails to initialize IPv6. The relevant zb> rc.conf is: zb> zb> ipv6_activate_all_interfaces="YES" zb> ifconfig_em0_ipv6="inet6 accept_rtadv" zb> ip6addrctl_verbose="YES" zb> zb> The console output says: zb> zb> em0: DAD detected duplicate IPv6 address fe80:2::20c:29ff:fe0a:3989: NS zb> in/out=2/1, NA in=0 zb> em0: DAD complete for fe80:2::20c:29ff:fe0a:3989 - duplicate found zb> em0: manual intervention required zb> em0: possible hardware address duplication deteted, disable IPv6 zb> zb> And subsequently, em0's nd6 has "IFDISABLED" in it. zb> zb> With wireshark, I see two ICMPv6 neighbor solicitations that are identical zb> --- is this the problem? zb> zb> How do I fix this? Does your host environment have the same address on the bridged interface? -- Hiroki ----Security_Multipart(Mon_Jul__1_09_18_00_2013_865)-- Content-Type: application/pgp-signature Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iEYEABECAAYFAlHQyrgACgkQTyzT2CeTzy1E3gCg30hIUA69yv4x+/tY5ScVO3EB 3cgAoKenc6fQfiwICnhR6oVkzJrZNZZ/ =624S -----END PGP SIGNATURE----- ----Security_Multipart(Mon_Jul__1_09_18_00_2013_865)----