From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C1070C433E0 for ; Wed, 27 Jan 2021 21:57:44 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 31DEE64DA3 for ; Wed, 27 Jan 2021 21:57:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 31DEE64DA3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gnu.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:42754 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l4sop-0004Ga-7W for qemu-devel@archiver.kernel.org; Wed, 27 Jan 2021 16:57:43 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:48770) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l4smf-0003Fu-Vt for qemu-devel@nongnu.org; Wed, 27 Jan 2021 16:55:29 -0500 Received: from hera.aquilenet.fr ([185.233.100.1]:44254) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l4sme-0004Ty-5a for qemu-devel@nongnu.org; Wed, 27 Jan 2021 16:55:29 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id C4C703C3; Wed, 27 Jan 2021 22:55:25 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sljxaI8hu45k; Wed, 27 Jan 2021 22:55:25 +0100 (CET) Received: from begin (unknown [IPv6:2a01:cb19:956:1b00:de41:a9ff:fe47:ec49]) by hera.aquilenet.fr (Postfix) with ESMTPSA id EFBB654; Wed, 27 Jan 2021 22:55:24 +0100 (CET) Received: from samy by begin with local (Exim 4.94) (envelope-from ) id 1l4smZ-003qnJ-Ml; Wed, 27 Jan 2021 22:55:23 +0100 Date: Wed, 27 Jan 2021 22:55:23 +0100 From: Samuel Thibault To: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Subject: Re: [RFC] Change default ipv6 network from fec0/10 (site local) to fe80/10 (link local) Message-ID: <20210127215523.atnox644k5gek7ef@begin> References: <7e80b14a-e749-c5a4-69e1-83239f2ee5b1@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <7e80b14a-e749-c5a4-69e1-83239f2ee5b1@redhat.com> Organization: I am not organized User-Agent: NeoMutt/20170609 (1.8.3) X-Spamd-Bar: -- Authentication-Results: hera.aquilenet.fr X-Rspamd-Server: hera X-Rspamd-Queue-Id: C4C703C3 X-Spamd-Result: default: False [-2.50 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_FIVE(0.00)[6]; HAS_ORG_HEADER(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; MID_RHS_NOT_FQDN(0.50)[]; BAYES_HAM(-3.00)[100.00%] Received-SPF: softfail client-ip=185.233.100.1; envelope-from=samuel.thibault@gnu.org; helo=hera.aquilenet.fr X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_SOFTFAIL=0.665 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: libvir-list@redhat.com, Jason Wang , "Daniel P. Berrange" , QEMU Developers , Doug Evans Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hello, Philippe Mathieu-Daudé, le mer. 27 janv. 2021 22:46:13 +0100, a ecrit: > On 1/27/21 8:13 PM, Doug Evans wrote: > > I happened to notice QEMU's default for the ipv6 network is fec0::/10 > > which is deprecated (RFC3879). > > I think(!) an obvious replacement is fe80::/10, link local. fe80::/10 is really a different thing, I don't think we want to use it. We can use some prefix in fc00::/7, such as fd00::/8. It "just" needs checking with various guest OS, to check that it doesn't break the default behavior. Samuel