From owner-freebsd-questions@FreeBSD.ORG Wed Nov 14 08:20:16 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A54E416A474 for ; Wed, 14 Nov 2007 08:20:16 +0000 (UTC) (envelope-from gonnabefun@gmail.com) Received: from fk-out-0910.google.com (fk-out-0910.google.com [209.85.128.191]) by mx1.freebsd.org (Postfix) with ESMTP id 29AC113C46B for ; Wed, 14 Nov 2007 08:20:15 +0000 (UTC) (envelope-from gonnabefun@gmail.com) Received: by fk-out-0910.google.com with SMTP id b27so116290fka for ; Wed, 14 Nov 2007 00:20:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:date:from:reply-to:x-priority:message-id:to:subject:mime-version:content-type:content-transfer-encoding; bh=KLH+agW2pdBMkDh+EisxKu/bN0qTDOpCwcxz7cqeS+M=; b=BRwKUGRd8/7G04Kc2rYJrFkzvO+cFlSqX76x4M6/0QoLLDXvCXDnd+maiHf3yso8H32FMp4vl3Kc6FMJxApr9mOQm0LyZE8DF+h1TRlIlm4+YzK6DjqsgIeFVFGD9r9kOfXiP3dJH7UPhbK3K3qQalNPv8XK4cbr3pS1L1hCNIc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:date:from:reply-to:x-priority:message-id:to:subject:mime-version:content-type:content-transfer-encoding; b=f+nCM87xkAveaagld16gQIElxUtuUAuWip2iR8Yx8ZMj5rk/kdhfTX1uujujnwAZBterpMsHCJ+ooB8cnR7Zj0BlTPatiWG5VFr2Tw3Vvh9f0e8JeH61U4+I6Sn4ApBr11UmdaKoZd1eLuAsqyQpH4zkprBpQqlr3raPLdku5KQ= Received: by 10.82.177.3 with SMTP id z3mr17002962bue.1195026657734; Tue, 13 Nov 2007 23:50:57 -0800 (PST) Received: from maes.venta.dp.ua ( [62.64.85.163]) by mx.google.com with ESMTPS id c5sm1827991nfi.2007.11.13.23.50.53 (version=SSLv3 cipher=OTHER); Tue, 13 Nov 2007 23:50:55 -0800 (PST) Date: Wed, 14 Nov 2007 09:50:51 +0200 From: Eugene X-Priority: 3 (Normal) Message-ID: <1788688982.20071114095051@gmail.com> To: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Subject: master->backup CARP issue X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Eugene List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Nov 2007 08:20:16 -0000 Hello freebsd, We have two FreeBSD boxes, each one has 4 CARP interfaces in preempt mode, without arp balancing. Backup without any reason preempts Master and after a while (an hour or two) it becomes Backup again. When Backup becomes Master on Master box net.inet.carp.suppress_preempt: 1, but all interfaces are up and seemed to work properly. Is there any ways to debug this issue? Additional info: #uname -v FreeBSD 6.1-RELEASE-p7 Master: # grep carp /var/log/messages Nov 14 01:50:59 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 01:52:30 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 02:43:55 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 02:59:12 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 03:26:13 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 03:26:32 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 04:58:39 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 05:53:27 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 06:01:12 atlas kernel: carp3: MASTER -> BACKUP (more frequent advertisement received) Nov 14 06:03:36 atlas kernel: carp2: BACKUP -> MASTER (preempting a slower master) Nov 14 06:03:36 atlas kernel: carp0: BACKUP -> MASTER (preempting a slower master) Nov 14 06:03:36 atlas kernel: carp1: BACKUP -> MASTER (preempting a slower master) Nov 14 06:03:38 atlas kernel: carp3: BACKUP -> MASTER (preempting a slower master) Master & Backup (in normal state) #sysctl -a | grep "net.inet.carp." net.inet.carp.allow: 1 net.inet.carp.preempt: 1 net.inet.carp.log: 2 net.inet.carp.arpbalance: 0 net.inet.carp.suppress_preempt: 0 all NICs - 3Com 3c905C-TX Master: #ifconfig | grep -A2 carp carp0: flags=49 mtu 1500 inet 10.1.1.3 netmask 0xffffff00 carp: MASTER vhid 1 advbase 1 advskew 10 carp1: flags=49 mtu 1500 inet 10.1.2.3 netmask 0xffffff00 carp: MASTER vhid 2 advbase 1 advskew 10 carp2: flags=49 mtu 1500 inet 10.1.3.3 netmask 0xffffff00 carp: MASTER vhid 3 advbase 1 advskew 10 carp3: flags=49 mtu 1500 inet 10.1.4.3 netmask 0xfffffff8 carp: MASTER vhid 4 advbase 1 advskew 10 Backup #ifconfig |grep -A2 carp carp0: flags=49 mtu 1500 inet 10.1.1.3 netmask 0xffffff00 carp: BACKUP vhid 1 advbase 1 advskew 20 carp1: flags=49 mtu 1500 inet 1.1.2.3 netmask 0xffffff00 carp: BACKUP vhid 2 advbase 1 advskew 20 carp2: flags=49 mtu 1500 inet 10.1.3.3 netmask 0xffffff00 carp: BACKUP vhid 3 advbase 1 advskew 20 carp3: flags=49 mtu 1500 inet 10.1.4.3 netmask 0xfffffff8 carp: BACKUP vhid 4 advbase 1 advskew 20 Master: #netstat -ni |grep carp Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll carp0 1500 311894 1 5926852 0 0 carp0 1500 10.1.1 10.1.1.3 42293866 - 263238 - - carp1 1500 48653 1 5663615 0 0 carp1 1500 10.1.2 10.1.2.3 153785957 - 0 - - carp2 1500 48661 1 5663615 107 0 carp2 1500 10.1.3/24 10.1.3.3 476782 - 0 - - carp3 1500 48974 1 5663634 1155 0 carp3 1500 10.1.4.3/ 10.1.4.3 6885622 - 0 - - Backup: #netstat -ni |grep carp Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll carp0 1500 35221 0 6437 0 0 carp0 1500 10.1.1 10.1.1.3 8699 - 0 - - carp1 1500 35220 0 6438 0 0 carp1 1500 10.1.2 10.1.2.3 86000 - 0 - - carp2 1500 35221 0 6437 0 0 carp2 1500 10.1.3/24 10.1.3.3 0 - 0 - - carp3 1500 35190 0 6443 23 0 carp3 1500 10.1.4.3/ 10.1.4.3 958 - 0 - - Thanks in advance! -- Best regards, Eugene mailto:gonnabefun@gmail.com