From owner-freebsd-bugs@freebsd.org Mon Nov 26 16:12:30 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 64785113B0AD for ; Mon, 26 Nov 2018 16:12:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id D96BC7AA66 for ; Mon, 26 Nov 2018 16:12:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 9CF4F113B0AC; Mon, 26 Nov 2018 16:12:29 +0000 (UTC) Delivered-To: bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7612E113B0AB for ; Mon, 26 Nov 2018 16:12:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EF2537AA55 for ; Mon, 26 Nov 2018 16:12:28 +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 mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 175AC1E7EB for ; Mon, 26 Nov 2018 16:12:28 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id wAQGCRmo036688 for ; Mon, 26 Nov 2018 16:12:27 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id wAQGCRaQ036687 for bugs@FreeBSD.org; Mon, 26 Nov 2018 16:12:27 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 233535] Machines lost ping6 after adding same IPv6 address Date: Mon, 26 Nov 2018 16:12:28 +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: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: slavash@FreeBSD.org 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-Rspamd-Queue-Id: D96BC7AA66 X-Spamd-Result: default: False [1.98 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_SPAM_LONG(0.79)[0.792,0]; NEURAL_SPAM_MEDIUM(0.52)[0.525,0]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; NEURAL_SPAM_SHORT(0.66)[0.662,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Nov 2018 16:12:30 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233535 Bug ID: 233535 Summary: Machines lost ping6 after adding same IPv6 address Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: slavash@FreeBSD.org Setup: 2 hosts connected back-to-back=20 # uname -rv 13.0-CURRENT FreeBSD 13.0-CURRENT r340922 GENERIC-NODEBUG Steps to reproduce: 1. Configure IPv6 address on both hosts: HOST A: ifconfig igb0 inet6 2002::1 HOST B: ifconfig igb0 inet6 2002::2 2. Ping to make sure all works: # ping6 2002::2 PING6(56=3D40+8+8 bytes) 2002::1 --> 2002::2 16 bytes from 2002::2, icmp_seq=3D0 hlim=3D64 time=3D0.101 ms 16 bytes from 2002::2, icmp_seq=3D1 hlim=3D64 time=3D0.085 ms ^C --- 2002::2 ping6 statistics --- 2 packets transmitted, 2 packets received, 0.0% packet loss round-trip min/avg/max/std-dev =3D 0.085/0.093/0.101/0.008 ms 3. On both hosts configure the same IP=20 HOST A: ifconfig igb0 inet6 2002::1 HOST B: ifconfig igb0 inet6 2002::2 4. Check ping again # ping6 2002::2 PING6(56=3D40+8+8 bytes) 2002::1 --> 2002::2 ^C --- 2002::2 ping6 statistics --- 7 packets transmitted, 0 packets received, 100.0% packet loss Few notes: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 1. Seems like sometimes need to do step 3 multiple times. 2. Pinging from the other side, may resolve the issue. 3. Issue is reproducing on other NIC vendors. >From tcpdump, I see that the other side is getting the NS messages, but nev= er replies: # tcpdump -nei igb0 host 2002::1 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on igb0, link-type EN10MB (Ethernet), capture size 262144 bytes 18:10:10.176317 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:11.196325 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:12.343345 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:13.377329 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:14.382334 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:15.533880 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:16.583342 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 18:10:17.603347 0c:c4:7a:a8:b7:f6 > 33:33:ff:00:00:02, ethertype IPv6 (0x86= dd), length 86: 2002::1 > ff02::1:ff00:2: ICMP6, neighbor solicitation, who has 2002::2, length 32 ^C 8 packets captured 41 packets received by filter 0 packets dropped by kernel --=20 You are receiving this mail because: You are the assignee for the bug.=