From owner-freebsd-net@freebsd.org Mon Oct 8 23:13:00 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1EFF310CECC9 for ; Mon, 8 Oct 2018 23:13:00 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: from mail-ot1-x333.google.com (mail-ot1-x333.google.com [IPv6:2607:f8b0:4864:20::333]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8E00E8457B for ; Mon, 8 Oct 2018 23:12:59 +0000 (UTC) (envelope-from kob6558@gmail.com) Received: by mail-ot1-x333.google.com with SMTP id l58so6737837otd.6 for ; Mon, 08 Oct 2018 16:12:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=UM/63VvgYAmLWDqxZxWv6WTo9uJl9FETNUMIr1R6J1M=; b=khE9pw3e78ZNllHy32zUVtuRC8Yq39nP5eLGP70eeLKUIvKZb+f3fzSa2MTfQGaFns +CxlYBl/pphskL0KzGp7pcVY00NXkfWOIbmCT1OiMfusLu1G9fne/GvfGl67vA2lAxnE /8cB/GSYwqvoxyMkK0LQqGeLdK0bleBC9k+yX/crSkl7lZ9mUszvGpPYSrj13CA9ulI3 wnSWKqzIKlETJMA8S7r0d4qNk4rsOxSqQ8L5cUemyAcUrS6xTrT7HpiB/EIHNuxiKjWt NgteQCdavZrRAbv1cDIrQ4FnI8YadkMc7YBvteqcdV6HjWmfd+qJdx62PgEUyViX3bhN mJ/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=UM/63VvgYAmLWDqxZxWv6WTo9uJl9FETNUMIr1R6J1M=; b=tOfpSkme78ksvm63KGTjnMTt1vCSmpdmpAylbIWfXIgNA/S8RmOe0y1+ut0RqUiqDn gGpT4BPpP2iqQ4jx7hBXMuiJILXEUmAnIdkrKZijpK6UNbwG4oxRiNA4buVBHc7IXg34 /rjV8SPFxaUoNl3djDAmMiXEXgrrRVLso8kPNjQXTd80zHgGNmznephNNxfeQSUcmIJU NsWHSD/tvKDAc5jjJYoSx+vT8zdH0da8vv7rQ7ufMbHnJT9LXMj+BXGsJOAwqI9mCk72 k45+VQIa87iS3sFr/M/6/T6t4dNLJf4S5TCbEVOS8iT9JBrr4kGXKBwd2zcX6n5DNIy3 /n1A== X-Gm-Message-State: ABuFfojkWLlgJkK2RzMVbKZRp7RRks2V1hZDAAXWPhXBmDyN+2ZZQ8Ck iZGN5JfWM0L4yE8dTqaTSPX+dW4eeyAbdzPQR61JF1R2 X-Google-Smtp-Source: ACcGV62Mzm7fcaer09odtw/TNskdaUZfYaqrx7RLvS95Gl0MVccLtk2GtjceuXkF2gMIz4xQ21C1QDsOWrhJWSOIPJE= X-Received: by 2002:a9d:5024:: with SMTP id a36mr14700867oth.195.1539040378655; Mon, 08 Oct 2018 16:12:58 -0700 (PDT) MIME-Version: 1.0 References: <20180930022007.GA2041@admin.sibptus.ru> <20181008170044.GA80041@admin.sibptus.ru> In-Reply-To: <20181008170044.GA80041@admin.sibptus.ru> From: Kevin Oberman Date: Mon, 8 Oct 2018 16:12:41 -0700 Message-ID: Subject: Re: why rtsold ? To: Victor Sudakov Cc: citrin+bsd@citrin.ru, freebsd-net Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.27 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.27 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, 08 Oct 2018 23:13:00 -0000 On Mon, Oct 8, 2018 at 10:01 AM Victor Sudakov wrote: > Anton Yuzhaninov wrote: > > On 9/29/18 10:20 PM, Victor Sudakov wrote: > > > When running FreeBSD as an IPv6 host im SLAAC mode, is > > > "rtsold_enable=YES" really necessary? I did not enable rtsold and IPv6 > > > still works fine only with > > > > rtsold is needed to write DNS server address from RDNSS RA option to > > /etc/resolv.conf > > > > man rtsold > > /-R > > On my test IPv6-only host, /etc/resolv.conf was successfully created > without any explicit "rtsold_enable=YES". > > -- > Victor Sudakov, VAS4-RIPE, VAS47-RIPN > 2:5005/49@fidonet http://vas.tomsk.ru/ > Remember that DHCPv6 can provide DNS server and other information even when SLAAC is used for address configuration. If it is, it is possible to run SLAAC without rtsold, but it may not prove stable as it is not possible to deal with router changes after network startup. (I do run rtsold on my laptop even though I only need it when not connecting to my home network and that net supports IPv6.) -- Kevin Oberman, Part time kid herder and retired Network Engineer E-mail: rkoberman@gmail.com PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683