From owner-freebsd-net@freebsd.org Sat Jan 2 14:57:35 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id C391D4D2521; Sat, 2 Jan 2021 14:57:35 +0000 (UTC) (envelope-from vas@sibptus.ru) Received: from admin.sibptus.ru (admin.sibptus.ru [IPv6:2001:19f0:5001:21dc::10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4D7Q3g0dKxz4TPK; Sat, 2 Jan 2021 14:57:34 +0000 (UTC) (envelope-from vas@sibptus.ru) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sibptus.ru; s=20181118; h=Message-ID:Subject:To:From:Date:In-Reply-To; bh=OVKajvKTxY+L+Fw/If679L9Gbx5Fd9UO8fJ1g0OjbBI=; b=lY0NTpSSBcaSIdO8V1zwDiinuO 6oCR0lFKmjLoWciJmdwz1hAeI5ZnvVoAy/dz1lPat6HRCiwy/cZDujH5OrNHxbTV7WL9OSvg1DgN9 262XiBTUn3TFZDqKeb8I6AuIutNYONbsf2kgOd7Cs67Ck9WcMcQo7eOSxZk8SkOQezpI=; Received: from vas by admin.sibptus.ru with local (Exim 4.94 (FreeBSD)) (envelope-from ) id 1kviLP-000Gco-17; Sat, 02 Jan 2021 21:57:27 +0700 Date: Sat, 2 Jan 2021 21:57:27 +0700 From: Victor Sudakov To: freebsd-net@freebsd.org Cc: freebsd-questions@freebsd.org Subject: FreeBSD does not reply to IPv6 Neighbor Solicitations Message-ID: <20210102145727.GA62235@admin.sibptus.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WIyZ46R2i8wDzkSu" Content-Disposition: inline X-PGP-Key: http://admin.sibptus.ru/~vas/ X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 X-Rspamd-Queue-Id: 4D7Q3g0dKxz4TPK X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=sibptus.ru header.s=20181118 header.b=lY0NTpSS; dmarc=pass (policy=none) header.from=sibptus.ru; spf=pass (mx1.freebsd.org: domain of vas@sibptus.ru designates 2001:19f0:5001:21dc::10 as permitted sender) smtp.mailfrom=vas@sibptus.ru X-Spamd-Result: default: False [-6.10 / 15.00]; ARC_NA(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[2001:19f0:5001:21dc::10:from]; R_DKIM_ALLOW(-0.20)[sibptus.ru:s=20181118]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; SPAMHAUS_ZRD(0.00)[2001:19f0:5001:21dc::10:from:127.0.2.255]; DKIM_TRACE(0.00)[sibptus.ru:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[sibptus.ru,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; SIGNED_PGP(-2.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:20473, ipnet:2001:19f0:5000::/38, country:US]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-net,freebsd-questions] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 02 Jan 2021 14:57:35 -0000 --WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Dear Colleagues, Why could it be that a FreeBSD 12.2 host does not reply to ICMPv6 Neighbor Solicitations from the router? Interface configuration on host: $ ifconfig re1 re1: flags=3D8843 metric 0 mtu 1500 options=3D8209b ether c4:12:f5:33:c9:7c inet 192.168.170.5/24 broadcast 192.168.170.255 inet6 fe80::c612:f5ff:fe33:c97c%re1/64 scopeid 0x2 inet6 2001:470:ecba:3::5/64 media: Ethernet autoselect (1000baseT ) status: active nd6 options=3D21 $=20 Interface configuration on router: [admin@MikroTik] > /ipv6 address print where interface=3Dbridge Flags: X - disabled, I - invalid, D - dynamic, G - global, L - link-local= =20 # ADDRESS FROM-POOL INTERFACE=20 0 DL fe80::4a8f:5aff:feab:b0c1/64 bridge 1 G 2001:470:ecba:3::1/64 bridge [admin@MikroTik] >=20 Packet dump: http://admin.sibptus.ru/~vas/nd1.pcapng where I ping a host in the IPv6 Internet from 2001:470:ecba:3::5, the router wants to learn the L2 address for 2001:470:ecba:3::5 to reply to, and receives no answer. Where could be the problem? --=20 Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/ --WIyZ46R2i8wDzkSu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEcBAEBAgAGBQJf8InXAAoJEA2k8lmbXsY0ruEH+gIl9oRBnPA8fZmkzVOy2CIN +fWBzapWKN7EkcqAhcB3BpgtpyjmS9BwwFEN3NyF/AqWcUmahL8UIweai1fySaVu r6Ympy8T9HxKLU5C/STotfHs0xmWdNqff4scBnxEkwobyuHiqqe45mC7nf4mNrV8 uIutot2BfURlW41YhhOPjaI8bDpxPVu78Oz74KNyElXnME5405wpEsjtnFB8VvIl BdJwdFYVt0Sy8dRDAuDoCbbuUQXjVz9934Ix8JuZlx0wM++YLzladcQdZCQBraRk Hdo6ks9iz41bYghuV07IjBKJEGmoygb8oYHsTjORY1cJI8b/SenZ0MBvkyijAJg= =9W/G -----END PGP SIGNATURE----- --WIyZ46R2i8wDzkSu--