Date: Fri, 4 Jan 2019 14:56:28 +0000 From: Shamim Shahriar <shamim.shahriar@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-net@freebsd.org Subject: Re: IPv6 Broken in 12 Message-ID: <CAOyJeZSnGp8%2Bfn%2Bwn%2BUFpLjjFaMj5V6SGwNfPHuQjK_izj%2B8AA@mail.gmail.com> In-Reply-To: <f1b8670b-fe4d-f3a6-8ebc-2522c7b34141@selasky.org> References: <CAOyJeZTDKgHyh-E7R3T9kHuZg0oApp-rkwFPPQdur5UpEbLqUA@mail.gmail.com> <f1b8670b-fe4d-f3a6-8ebc-2522c7b34141@selasky.org>
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Hi Hans Thank you for your response. The problem is NOT with link local -- link local works fine, it is the global one that is not working. i.e., I can ping the router without any issue, I can also ping any of the machines within the same subnet. But the moment I leave the subnet, the connection does not work. The router keeps on sending neighbor solicitation packets which are ignored by my machine. I do not have source loaded on the computer, so might need a bit of time to apply the patch. Given that this is not a link local issue (I think), do you still want me to try out the patch? Thanks and regards On Fri, 4 Jan 2019 at 14:47, Hans Petter Selasky <hps@selasky.org> wrote: > 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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