From owner-freebsd-net@freebsd.org Mon Aug 31 08:37:16 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 552E63BA1A7 for ; Mon, 31 Aug 2020 08:37:16 +0000 (UTC) (envelope-from SRS0=2x11=CJ=perdition.city=julien@bebif.be) Received: from orval.bbpf.belspo.be (orval.bbpf.belspo.be [193.191.208.90]) by mx1.freebsd.org (Postfix) with ESMTP id 4Bg3V30m8cz4FRw for ; Mon, 31 Aug 2020 08:37:14 +0000 (UTC) (envelope-from SRS0=2x11=CJ=perdition.city=julien@bebif.be) Received: from x1 (77.109.123.220.adsl.dyn.edpnet.net [77.109.123.220]) by orval.bbpf.belspo.be (Postfix) with ESMTPSA id E9D3A1D4FC53 for ; Mon, 31 Aug 2020 10:37:07 +0200 (CEST) Date: Mon, 31 Aug 2020 10:37:05 +0200 From: Julien Cigar To: freebsd-net@freebsd.org Subject: Re: CARP over VLAN over LAGG Message-ID: <20200831083705.pvrjk4srdohlxklf@x1> Mail-Followup-To: freebsd-net@freebsd.org References: <20200828145201.ezo6zbatmdmcgvzp@x1> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200828145201.ezo6zbatmdmcgvzp@x1> X-Rspamd-Queue-Id: 4Bg3V30m8cz4FRw X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of SRS0=2x11=CJ=perdition.city=julien@bebif.be designates 193.191.208.90 as permitted sender) smtp.mailfrom=SRS0=2x11=CJ=perdition.city=julien@bebif.be X-Spamd-Result: default: False [-0.38 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.71)[-0.707]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.20)[-0.199]; MID_RHS_NOT_FQDN(0.50)[]; NEURAL_HAM_SHORT(-0.07)[-0.075]; DMARC_NA(0.00)[perdition.city]; FORGED_SENDER(0.30)[julien@perdition.city,SRS0=2x11=CJ=perdition.city=julien@bebif.be]; RCVD_NO_TLS_LAST(0.10)[]; RECEIVED_SPAMHAUS_PBL(0.00)[77.109.123.220:received]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:2611, ipnet:193.191.192.0/19, country:BE]; FROM_NEQ_ENVFROM(0.00)[julien@perdition.city,SRS0=2x11=CJ=perdition.city=julien@bebif.be]; MAILMAN_DEST(0.00)[freebsd-net]; RCVD_COUNT_TWO(0.00)[2] 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: Mon, 31 Aug 2020 08:37:16 -0000 On Fri, Aug 28, 2020 at 04:52:01PM +0200, Julien Cigar wrote: > Hello, > > I have a "highly available" router/firewall with the following > configuration (1). Those are plugged in two 2930F (with VSF) using LACP. > It works well, except that I have some weird issues with the CARP > demotion counter when I'm unplugging some interfaces involved in the > lagg/carp setup, for example if I unplug/replug igb0 and igb1 in this > case: > > (dmesg): > igb0: link state changed to DOWN > igb1: link state changed to DOWN > carp: demoted by 240 to 240 (send error 50 on vlan11) > carp: 11@vlan11: MASTER -> BACKUP (more frequent advertisement received) > vlan11: deletion failed: 3 > igb1: link state changed to UP > igb0: link state changed to UP > > then the CARP status stays to BACKUP unless I demote the CARP demotion > counter manually with: sudo sysctl net.inet.carp.demotion=-240: > > (dmesg): > carp: demoted by -240 to 0 (sysctl) > carp: 11@vlan11: BACKUP -> MASTER (preempting a slower master) > > I guess this is because it takes some time for lagg/lacp to converge and > thus carp thinks that there is a problematic condition as it experiences > problems with sending announcements.. > > What it the best way to handle this? I'm wondering if setting net.inet.carp.senderr_demotion_factor to "0" could be a solution? Are there any downsides of setting this to "0" instead of "240"? > > Thanks, > Julien > > (1) https://gist.github.com/silenius/577606b596ff1d220bbfd9956d05baef > > -- > Julien Cigar > Belgian Biodiversity Platform (http://www.biodiversity.be) > PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 > No trees were killed in the creation of this message. > However, many electrons were terribly inconvenienced. > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" -- Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced.