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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 A852CC49ED7 for ; Fri, 13 Sep 2019 17:02:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A9B6206BB for ; Fri, 13 Sep 2019 17:02:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="aa8uruEY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730958AbfIMRCD (ORCPT ); Fri, 13 Sep 2019 13:02:03 -0400 Received: from mail-pg1-f172.google.com ([209.85.215.172]:43673 "EHLO mail-pg1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725777AbfIMRCD (ORCPT ); Fri, 13 Sep 2019 13:02:03 -0400 Received: by mail-pg1-f172.google.com with SMTP id u72so15540379pgb.10 for ; Fri, 13 Sep 2019 10:02:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=5tb54EOQZGguzv0ITwwi3McohrFW0dBLJf2I0xbQMcs=; b=aa8uruEYnw+hRuJV0ZWOuOpubXApG7+gYHl64uV/bMIKwT3Pe/K8jyiFhMvSJBopP+ 2iIAKfi2NiMUEByeSklVxDwQhG5UGUxPjWxX50M3rPCsvJou57qi0bfwmoqjs7OuxgBj RRieipozccxgBj+X96vGTRBOoD0IREUjkCotrngr95Q2ZA+IrW5OQEwm1WluNPohOAln T1gbV0Zh+8UB7vAKVXs572q8Ftp9UGkXg9unSW9zZ2Tts67Zgw2u1bwu0xt+ueh0Y2oO plo76vTVQDuApyeCkLIDk7x7hob95Y7dw4KrBkY2YhQfZb4QUU+gjDo2S1tHRsw8DiBk qiNA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=5tb54EOQZGguzv0ITwwi3McohrFW0dBLJf2I0xbQMcs=; b=EvUtsiBSTRMaEtgKmx0KXtmeYn/upODN38ULS6GTJGoclmnMMZG/oxfHKC45UvpVZ4 zPz4PGl7iqTu1fyP8rSslcAPcaDNjvReSGcjzZymTdGEK/kW35UQgLwExiGfTj+hBGOz 9iQxGxHfLvUd9iibcWW69qRhIPa6RZxJZHQb6zWKCTqu2JlYROyV6ufxYfdC7lrc30KZ 4hLL3UlEg8krgkehxI2Z5QHnHZtxjZXIn85AUCJPl6OWr8dVhPTZDWlZw5RUxDh3a5sU cQmLrg/msN21KzGHAIN4c54hTP4vAeh+FbSh3jHSkvANst4ANwNKn/d50la3O0AfPVEB WBmQ== X-Gm-Message-State: APjAAAW589DGspDlNL4ZxV9VJwpNel6FDprNGsDsWaLYzAhdOuYplrBs YotIBc6XL9OhU89jdC+S9N2oUbkS X-Google-Smtp-Source: APXvYqyBI5h0/JhCUlWftgqmdz8r/DONuO7DnoAnNDnHVy6B3TjzJipMiyKfWQzv3pKNa3MMcsL4EQ== X-Received: by 2002:a17:90a:c217:: with SMTP id e23mr6387648pjt.129.1568394122574; Fri, 13 Sep 2019 10:02:02 -0700 (PDT) Received: from dahern-DO-MB.local ([2601:282:800:fd80:f0f8:327c:ea9:5985]) by smtp.googlemail.com with ESMTPSA id v12sm25029661pgr.86.2019.09.13.10.02.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 13 Sep 2019 10:02:01 -0700 (PDT) Subject: Re: "[RFC PATCH net-next 2/2] Reduce localhost to 127.0.0.0/16" To: Dave Taht , Mark Smith Cc: Linux Kernel Network Developers References: From: David Ahern Message-ID: <9d2898f5-e5dc-a2ff-168d-22c69cca5f01@gmail.com> Date: Fri, 13 Sep 2019 11:01:59 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 9/13/19 10:14 AM, Dave Taht wrote: > it came out that cumulus and a few others were possibly using high > values of 127.x for switch chassis addressing, but we haven't got any > documentation on how that works yet. Not Cumulus. I noted I am aware of 2 products from my history that use 127.x addresses for communications within a box - e.g., to a bmc - that your patch could break. Really it was meant as a data point that there are released products that would be affected.