From owner-freebsd-net@freebsd.org Mon May 22 12:13:23 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A7F09D77D96 for ; Mon, 22 May 2017 12:13:23 +0000 (UTC) (envelope-from alarig@swordarmor.fr) Received: from togepi.gozmail.bzh (togepi.gozmail.bzh [IPv6:2a00:5884:124::1]) (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 6C2051BD4 for ; Mon, 22 May 2017 12:13:23 +0000 (UTC) (envelope-from alarig@swordarmor.fr) Received: from mew.swordarmor.fr (mew.swordarmor.fr [IPv6:2a00:5884:102:1::4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: alarig@swordarmor.fr) by togepi.gozmail.bzh (Postfix) with ESMTPSA id 7D4FE1A0083; Mon, 22 May 2017 14:13:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=swordarmor.fr; s=default; t=1495455199; bh=d2FJ+Ut/DUulshDTWy5iVZ8nChZn7OLj7qiV4v/KQWI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PVtorA6Z8bzYP26O04XCmJFmn0wXZNxJeBgNZE23w5Urs9TiIzswiEvR8xWpt21Tr 7+9xXt/rjfribEYfaamizN4KicXp6jxGhpIG4gAUIK1qKcDgUM48Pw+XVBDEK2SVCA K/Kj3Cf80imVMJLbCLMaXZkEK9qnbCLrwq+pmL7Q= Date: Mon, 22 May 2017 14:13:18 +0200 From: Alarig Le Lay To: William Gathoye Cc: "Andrey V. Elsukov" , freebsd-net@freebsd.org Subject: Re: Public IPv6s fail on KVM bridge with "No buffer space available" Message-ID: <20170522121318.2pzqt5ryisrl44rn@mew.swordarmor.fr> References: <84cecdc7-e331-d3bc-3fb3-e35507e231d6@yandex.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="wystypbis4c62uhx" Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170128 (1.7.2) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.23 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, 22 May 2017 12:13:23 -0000 --wystypbis4c62uhx Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On lun. 22 mai 14:03:54 2017, William Gathoye wrote: > Btw, if I wanted to use link local addresses to communicate with the > provider next hop gateway, how can I know the local link fe80 IPv6 > address of that gateway since my provider (OVH) doesn't disclose it? You can try to ping6 the IPv6 multicast address for all the routers on the link: 14:07 alarig@mew ~ % ping6 -c1 ff02::2%vtnet0 PING6(56=3D40+8+8 bytes) fe80::a800:ff:fe93:83a3%vtnet0 --> ff02::2%vtnet0 16 bytes from fe80::209%vtnet0, icmp_seq=3D0 hlim=3D64 time=3D0.237 ms --- ff02::2%vtnet0 ping6 statistics --- 1 packets transmitted, 1 packets received, 0.0% packet loss round-trip min/avg/max/std-dev =3D 0.237/0.237/0.237/0.000 ms But, it=E2=80=99s possible that you don=E2=80=99t get any reply if they do = some nasty things on their network (as Hetzner does). In that case, you=E2=80=99re stu= ck on the /56 setup. --=20 alarig --wystypbis4c62uhx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEE+2yGwT0H0n57WkRbrzhKwWsgK4gFAlki1dsACgkQrzhKwWsg K4j5fwgAgMXzefkvOwdPJYejyjET3bR/VLEa2iX0PCn8f5iSAPr0xCoIwJNWlcXv fLKny43qsf42lVFu5H4FkSOYIWB5/03mu4xjmk6xDdpy+TLB2Q4Iae0ySt0ZlNmG COzh5o2RxuHf+QvAFHeCYWP4Ve1m/k35wzUuPbmzW3xktf13/py7/S1/x3wdT7Zq MekdkamHSoSk5QKtZGEBlh5bmA/ikhey8LkaPKjGv0IVyQH0obn8TGCLQCpt8HJE 1M6P+PasvBRndZXVJh/5Gb/6BQedtzItzLGThvkDtKQA55jdWLnJdJRLsFjzPHju 7kEmWEVYn0M/GGJYCksMqZgf5aXwGQ== =1hsK -----END PGP SIGNATURE----- --wystypbis4c62uhx--