From owner-freebsd-net@freebsd.org Mon May 22 12:04:00 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 22135D775DA for ; Mon, 22 May 2017 12:04:00 +0000 (UTC) (envelope-from william@gathoye.be) Received: from mail-wm0-x243.google.com (mail-wm0-x243.google.com [IPv6:2a00:1450:400c:c09::243]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A9FB012B8 for ; Mon, 22 May 2017 12:03:58 +0000 (UTC) (envelope-from william@gathoye.be) Received: by mail-wm0-x243.google.com with SMTP id k15so31588951wmh.3 for ; Mon, 22 May 2017 05:03:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gathoye-be.20150623.gappssmtp.com; s=20150623; h=from:subject:to:references:message-id:disposition-notification-to :date:user-agent:mime-version:in-reply-to; bh=+YK1uRnHhTXYfeisYL5xvmmPp1K2ZZzXUA4i3m13X2c=; b=YtDNfQYbZjJKe+c5R9EC6gJSc9HRf6Dey3DNOJdkW8UnZRt3K1C95fvY0GRWogi3uk Ydfvn0E2wTGqACpM76/VzLVcJTbJAUqJv77K5QMcspEO0wYqEwtyYxkH4erEqMmEgBHA PPeNtUJGAgVyYDT5Xom10FFuMFNoiGaTOGf24hWyrpjOIEeE/lRJeDo0r/7tuj6/fUc5 wB6aesTFevrGK8/04R7myJcE4kuzCR8KC6MeteFuXunm1RT6bUsIM7au9ZiE0bgJxpnU CmwGUw59lTskIMZuDBLDlkOIDeWrJLp5AJDuAiVhtDUsZcXCpqbd11+OwmK/HPRmIvP2 gSrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:references:message-id :disposition-notification-to:date:user-agent:mime-version :in-reply-to; bh=+YK1uRnHhTXYfeisYL5xvmmPp1K2ZZzXUA4i3m13X2c=; b=fnfOHfWEZy3K9tGtbe5YXhqxJcXg8xS5hNR5CuHa3iPlA6imKj4Af02/ur4EsupGlU wTU0p4Rm1GdBoY3AEx63MSXB8XmUgLYYrZyTdgnB84igDfJqyGamVxtmqfa8ILRrI2Q7 o3+eOcpMK571cNhywAUV3TeU5kQJxiZNfcdfQ5rd1twj9G3s/ZycgwcXPvMeiGFQNzDY teF5K5J2e1p9ekDn4mjI+eFnu//7assccR+3VZ9gpecT6X/1OvIyKCfDRkXXW2eXM1op wIjkk/94ldOiggq5w26dHMozvxsX5jdDfOIl0C4xpjE6BSM0n+58Qc3j3JpK1RSoXkCj V3RA== X-Gm-Message-State: AODbwcB6ahcmjwdTkmiGQDO2x1H5vxeiQEYyIGw2mzhRFmJiCao9QUrz i33syHpLr58yRz6PkTwc/A== X-Received: by 10.80.194.25 with SMTP id n25mr17074508edf.153.1495454636889; Mon, 22 May 2017 05:03:56 -0700 (PDT) Received: from ?IPv6:2a02:2788:134:20ee:d1be:7ddc:738f:4830? ([2a02:2788:134:20ee:d1be:7ddc:738f:4830]) by smtp.gmail.com with ESMTPSA id e11sm6859990edd.68.2017.05.22.05.03.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 May 2017 05:03:55 -0700 (PDT) From: William Gathoye Subject: Re: Public IPv6s fail on KVM bridge with "No buffer space available" To: "Andrey V. Elsukov" , alarig@swordarmor.fr, freebsd-net@freebsd.org References: <84cecdc7-e331-d3bc-3fb3-e35507e231d6@yandex.ru> Message-ID: Date: Mon, 22 May 2017 14:03:54 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 MIME-Version: 1.0 In-Reply-To: <84cecdc7-e331-d3bc-3fb3-e35507e231d6@yandex.ru> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="aNeSV6RoDbCJSO8k62lMeHSswDQ68FhI4" 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 12:04:00 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --aNeSV6RoDbCJSO8k62lMeHSswDQ68FhI4 Content-Type: multipart/mixed; boundary="1WBkh4ai208Pd4ew5clI3w84R6eCTEusC"; protected-headers="v1" From: William Gathoye To: "Andrey V. Elsukov" , alarig@swordarmor.fr, freebsd-net@freebsd.org Message-ID: Subject: Re: Public IPv6s fail on KVM bridge with "No buffer space available" References: <84cecdc7-e331-d3bc-3fb3-e35507e231d6@yandex.ru> In-Reply-To: <84cecdc7-e331-d3bc-3fb3-e35507e231d6@yandex.ru> --1WBkh4ai208Pd4ew5clI3w84R6eCTEusC Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Thanks all for your answers. Since I'm not subscribed to this list, please make sure I'm in your `To` field when replying. On 05/17/2017 09:45 AM, Andrey V. Elsukov wrote: >> Please note all my GWs are outside of my IP subnets. >=20 > FreeBSD's IPv6 NDP implementation can not find GWs layer 2 address, > since its IPv6 address is not considered as neighbor. You need to > configure IPv6 address on the vtnet0 interface from the same prefix as > GWs address. Or use link-local addresses. On 05/16/2017 21:36:54, Alarig Le Lay wrote: > Did you tried to use the fe80 of your router as gateway? After some discussion with guys from the company behind OPNsense, I have been able to solve my issue. My far gateway was in /56. Even if my IPv6 is not a /56, setting my IPv6 with a /56 prefix instead of the /64 fixed my issue. Thanks for the explanation with NDP, Andrey, this is what made us on the track. :) 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? Regards, And thanks again for your help. :) -- William Gathoye --1WBkh4ai208Pd4ew5clI3w84R6eCTEusC-- --aNeSV6RoDbCJSO8k62lMeHSswDQ68FhI4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE8ucX65+2FhkmJe7RDn3lLATXFoMFAlki06oACgkQDn3lLATX FoNVKQ/8Ck8NXvM6Bh570wxN+uxyP5WbJMTgFeKifIIHuZUIU5WkQvAxRpJ7x5wV yqBbnlwczFPx5sdnrcYjlgfjDl20cwPLHdHE4H9YBiLQvyodAoAFR0iFevT1hscJ ObRaZCZBduvm1I1LYbgmDMsmhjkK+KUi4ZHxGXzebNx7XrX0y/4jClWaWJzHIb/Z aI8ba5vXt0gHguJqiUQO/4VyihNEYueuxJhv55mml3Z7VrRYg/W8Cio4peMf4mqt rdVPsMQfp3c1m4M3TcyzBOiWwawNFESvHy36/hrnLxIsQkwOAaWRgkFsB1lWEDbB QChLFvLgtmWHvNLpe6Wzukl7PwKmSFmHP4DJB7iXsfTI5DyNaLOThq0PaqbqmVRp bDElfyQkPUKX9ZmZE0T01B4LBg026goQXqlZryXGUPCIk4vZmQ0jy+7ee0DsS/tM DtpupXNZK32LlDLzJrTCm601H9w+xuqyBJujGULqyRjJPkBiWcRIFDpXBmN/qBWE BUyBEIlG+sjeF66/JnXaioPNA0eu2QtbsZua5WoV2UmMbTARkwSpjHvN+MJxar1l 4TORkXrCISkJv5SHv2S6Rog9Lbs5F3Z8w6dTsBoAA7JnLEJUgcsLuGm7ntun0J8Z akSsT/GEGWVsnIFzj+mFeEHGI3Eux1JfGNuhUQEbB4bNfYEKpF4= =GLp5 -----END PGP SIGNATURE----- --aNeSV6RoDbCJSO8k62lMeHSswDQ68FhI4--