Date: Fri, 4 Jan 2019 15:45:00 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Shamim Shahriar <shamim.shahriar@gmail.com>, freebsd-net@freebsd.org Subject: Re: IPv6 Broken in 12 Message-ID: <f1b8670b-fe4d-f3a6-8ebc-2522c7b34141@selasky.org> In-Reply-To: <CAOyJeZTDKgHyh-E7R3T9kHuZg0oApp-rkwFPPQdur5UpEbLqUA@mail.gmail.com> References: <CAOyJeZTDKgHyh-E7R3T9kHuZg0oApp-rkwFPPQdur5UpEbLqUA@mail.gmail.com>
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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<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=81209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER> > 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 <full-duplex>) > status: active > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL> > > > # 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
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