From owner-freebsd-net@freebsd.org Fri Sep 18 03:31:03 2020 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0E3123F6C02 for ; Fri, 18 Sep 2020 03:31:03 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BszrP6mzvz42lp; Fri, 18 Sep 2020 03:31:01 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id 08I3Udmp007080 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 18 Sep 2020 03:30:42 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: arrowd@freebsd.org Received: from [10.58.0.10] (dadvw [10.58.0.10]) by eg.sd.rdtc.ru (8.16.1/8.16.1) with ESMTPS id 08I3UgTw078110 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 18 Sep 2020 10:30:42 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: ifconfig_*="DHCP" in absence of server To: Gleb Popov , freebsd-net@freebsd.org References: From: Eugene Grosbein Message-ID: <3ef4aa1b-d8fa-e201-6db8-e4c1d1dac63e@grosbein.net> Date: Fri, 18 Sep 2020 10:30:36 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00,LOCAL_FROM, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record * -0.0 SPF_PASS SPF: sender matches SPF record * 2.6 LOCAL_FROM From my domains * -0.1 NICE_REPLY_A Looks like a legit reply (A) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 4BszrP6mzvz42lp X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=permerror (mx1.freebsd.org: domain of eugen@grosbein.net uses mechanism not recognized by this client) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [-1.13 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[eugen]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.73)[-0.731]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; NEURAL_HAM_MEDIUM(-0.24)[-0.243]; RCVD_COUNT_THREE(0.00)[3]; R_SPF_PERMFAIL(0.00)[empty SPF record]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.05)[-0.054]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-net] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Sep 2020 03:31:03 -0000 17.09.2020 22:07, Gleb Popov wrote: > At $WORK I'm running a bunch of similar FreeBSD machines, all of them have > > ifconfig_DEFAULT="DHCP" > > in their /etc/rc.conf > > The DHCP server runs on some old Cisco router. > > At the start of the working day the power switch gets turned on and both > the router and FreeBSD machines start simultaneously. FreeBSD boots faster > than Cisco, but then hangs on "netif" rc script trying to acquire an IP > from the router. It waits for more than 30 seconds before giving up and > proceeding, and even after that the "routing" script blocks for another 30 > second with "waiting for default route". This delays the time needed to > reach the X graphics stage for too long. > > Funny enough, "SYNCDHCP" option shortens this time, but it is still visible. > > Is there any way to make DHCP acquisition asynchronous, or something else > to speed things up? Look for "background_dhclient" in the rc.conf manual page, it merely adds "-b" to dhclient flags.