From owner-freebsd-bugs@freebsd.org Fri Sep 11 13:02:51 2020 Return-Path: Delivered-To: freebsd-bugs@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 AB2C83D92EF for ; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4BnwsR47Zlz4KP2 for ; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 8DCF13D957A; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) Delivered-To: bugs@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 8C8BF3D9579 for ; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BnwsR3CJBz4KB9 for ; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 518D024598 for ; Fri, 11 Sep 2020 13:02:51 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 08BD2pZP008553 for ; Fri, 11 Sep 2020 13:02:51 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 08BD2pf5008552 for bugs@FreeBSD.org; Fri, 11 Sep 2020 13:02:51 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 249253] missing nd6 Neighbor Advertisement on carp failover Date: Fri, 11 Sep 2020 13:02:50 +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: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: claus.riegg@makandra.de X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: 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: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Sep 2020 13:02:51 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D249253 Bug ID: 249253 Summary: missing nd6 Neighbor Advertisement on carp failover Product: Base System Version: 12.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: claus.riegg@makandra.de We're experiencing delay on CARP failovers with IPv6 in multiple setups at = the moment.=20 Transition from BACKUP to master works fine and Gratuitous ARP is sent for = all IPv4 addresses immediately. The unsolicited Neighbor Advertisement for IPv6 seems to be missing (at least we don't see it when capturing traffic with TCP-dump).=20 Future Neighbor Solicitations will be answered by the current CARP MASTER correctly but until then traffic is still arriving at the BACKUP (former MASTER).=20 Google returned this blogpost: https://www.stoklasa.one/carp-with-ipv6-protocol/ Josef Stoklasa seems to think that this is normal behaviour but looking at carp_master_down_locked function here looks like that there should be an unsolicited Neighbor Advertisement: https://github.com/freebsd/freebsd/blob/03c216ce761c84dbe6ab7611453931211e9= 23986/sys/netinet/ip_carp.c#L1280 --=20 You are receiving this mail because: You are the assignee for the bug.=