From owner-freebsd-net@freebsd.org Fri Jan 4 14:47:25 2019 Return-Path: Delivered-To: freebsd-net@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 C3252142E193 for ; Fri, 4 Jan 2019 14:47:24 +0000 (UTC) (envelope-from hps@selasky.org) Received: from mail.turbocat.net (turbocat.net [IPv6:2a01:4f8:c17:6c4b::2]) (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 C89086C411 for ; Fri, 4 Jan 2019 14:47:23 +0000 (UTC) (envelope-from hps@selasky.org) Received: from hps2016.home.selasky.org (unknown [176.74.212.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.turbocat.net (Postfix) with ESMTPSA id 424D426022D; Fri, 4 Jan 2019 15:47:20 +0100 (CET) Subject: Re: IPv6 Broken in 12 To: Shamim Shahriar , freebsd-net@freebsd.org References: From: Hans Petter Selasky Message-ID: Date: Fri, 4 Jan 2019 15:45:00 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: C89086C411 X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; spf=pass (mx1.freebsd.org: domain of hps@selasky.org designates 2a01:4f8:c17:6c4b::2 as permitted sender) smtp.mailfrom=hps@selasky.org X-Spamd-Result: default: False [-6.15 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+a:mail.turbocat.net]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[selasky.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[cached: mail.turbocat.net]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.99)[-0.988,0]; IP_SCORE(-2.85)[ip: (-9.12), ipnet: 2a01:4f8::/29(-2.73), asn: 24940(-2.41), country: DE(-0.01)]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Jan 2019 14:47:25 -0000 On 1/4/19 3:29 PM, Shamim Shahriar wrote: > Dear List members, good afternoon and happy new year > > I am trying to setup a FreeBSD server v12 amd64, and it appears that IPv6 > on that is actually broken. I have confirmed that by having same hardware > running v11.2 (amd64), and that is working without any issue. > > Preamble: > The "infrastructure" in question is running mostly Juniper devices, and the > routers are advertising everything. So the only thing (related to IPv6) I > have in my rc.conf are > > ifconfig_em0_ipv6="inet6 accept_rtadv" > rtsold_enable="YES" > > This gives the machines an IPv6 from the intended subnet, and also > configures the defaultroute for the devices > > em0: flags=8843 metric 0 mtu 1500 > > options=81209b > ether 52:54:00:1a:a4:1a > inet6 fe80::e:f:11:12:a41a%em0 prefixlen 64 scopeid 0x1 > inet6 a:b:c:d:e:f:11:12:a41a prefixlen 64 autoconf > inet 172.16.1.23 netmask 0xffffff00 broadcast 172.16.1.255 > media: Ethernet autoselect (1000baseT ) > status: active > nd6 options=23 > > > # netstat -nr > Routing tables > > Internet: > Destination Gateway Flags Netif Expire > default 172.16.1.1 UGS em0 > 127.0.0.1 link#2 UH lo0 > 172.16.1.0/24 link#1 U em0 > 172.16.1.23 link#1 UHS lo0 > > Internet6: > Destination Gateway Flags > Netif Expire > ::/96 ::1 UGRS > lo0 > default fe80::e:f:11:12:200%em0 UG > em0 > ::1 link#2 UH > lo0 > ::ffff:0.0.0.0/96 ::1 UGRS > lo0 > a:b:c:d::/64 link#1 U > em0 > a:b:c:d:e:f:11:12:a41a link#1 UHS > lo0 > fe80::/10 ::1 UGRS > lo0 > fe80::%em0/64 link#1 U > em0 > fe80::e:f:11:12:a41a%em0 link#1 UHS > lo0 > fe80::%lo0/64 link#2 U > lo0 > fe80::1%lo0 link#2 UHS > lo0 > ff02::/16 > > > Problem: > In FreeBSD v12, if I do a tcpdump, it appears that the router is constantly > asking who has my IP, and the machine is not responding to it at all. > > (running on two different console on the same machine) > ping6 mx1 > PING6(56=40+8+8 bytes) a:b:c:d:5054:ff:fe1a:a41a --> 2222:aa:bb:cc::72 > > > # tcpdump -ni em0 icmp6 > 14:17:18.980755 IP6 a:b:c:d:e:f:11:12:a41a > 2222:aa:bb:cc::72: ICMP6, echo > request, seq 0, length 16 > 14:17:19.617708 IP6 fe80::200:5eff:fe00:200 > ff02::1:ff1a:a41a: ICMP6, > neighbor solicitation, who has a:b:c:d:e:f:11:12:a41a, length 32 > 14:17:20.003172 IP6 a:b:c:d:e:f:11:12:a41a > 2222:aa:bb:cc::72: ICMP6, echo > request, seq 1, length 16 > 14:17:20.617615 IP6 fe80::200:5eff:fe00:200 > ff02::1:ff1a:a41a: ICMP6, > neighbor solicitation, who has a:b:c:d:e:f:11:12:a41a, length 32 > 14:17:21.023423 IP6 a:b:c:d:e:f:11:12:a41a > 2222:aa:bb:cc::72: ICMP6, echo > request, seq 2, length 16 > > > Whereas, if I am running FreeBSD v11.2, it is working alright. I am getting > the ping response and what not. > > NOTE: Both the v12 and v11.2 was downloaded as of today (in a matter of > minutes -- not even hours) for setting up the machines. > > Could someone please confirm if what I am seeing is expected? If yes, how > soon is this likely to be fixed? > > If you require further information or need me to run more tests, please do > let me know. I will have the machines running for some time (reasonable > time), before I decide which of the two will prevail :D > > Thanks and regards Hi, Can you try the second debug patch mentioned here: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233535 Is this issue isolated to Link-Local IPv6 or is global IPv6 involved aswell? --HPS