From owner-freebsd-bugs@freebsd.org Wed Oct 26 11:58:52 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EAF8DC21B84 for ; Wed, 26 Oct 2016 11:58:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id C1CD1FC0 for ; Wed, 26 Oct 2016 11:58:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u9QBwqNm028435 for ; Wed, 26 Oct 2016 11:58:52 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 213804] [carp]: packets got processes on the BACKUP node under certain conditions Date: Wed, 26 Oct 2016 11:58:52 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.3-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: emz@norma.perm.ru X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Oct 2016 11:58:53 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213804 Bug ID: 213804 Summary: [carp]: packets got processes on the BACKUP node under certain conditions Product: Base System Version: 10.3-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: emz@norma.perm.ru Consider the following scheme: +-----------------+ iface1 | | iface2 +-------| host A (MASTER) |-------- | | | | +-----------------+ carp1 | +-----------------+ | | | iface2 +-------| host B (BACKUP) |-------- << packet to carp 1 IP iface1 | | +-----------------+ Lets assume both hosts are advertising themselves using rtadvd as ipv6 rout= ers for network attached to the iface2. In this case, they both can receive ipv6 packets undercertain conditions, destined to the CARP address carp1. When a BACKUP node receives such packets, it processes them locally, regardless of= the state of the CARP, as if it was MASTER. I observe this only on the ipv6, because the process of router advertising = in ipv6 is different from ipv4. However, I suppose the same rule applies to the ipv4, but it's not that important, since I cannot imagine the configuration that would reproduce this for ipv4. --=20 You are receiving this mail because: You are the assignee for the bug.=