Date: Mon, 31 Jul 2017 17:31:27 +0200 (CEST) From: =?ISO-8859-1?Q?Trond_Endrest=F8l?= <Trond.Endrestol@fagskolen.gjovik.no> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: default route via SLAAC not working ? Message-ID: <alpine.BSF.2.21.1707311727060.1133@mail.fig.ol.no> In-Reply-To: <96b09a19-01e1-e182-e9c0-d1526a12373f@sentex.net> References: <96b09a19-01e1-e182-e9c0-d1526a12373f@sentex.net>
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On Mon, 31 Jul 2017 10:34-0400, Mike Tancsa wrote: > Not sure if this is the client or the router (an LTE modem) or some > option on the FreeBSD client, but I am not getting the inet6 default > route installed when I pick up an IP6 addr at boot time. Looking at the > pcap at the start, I see the following exchange > > > 10:05:51.261641 a4:71:74:2b:c1:37 > 33:33:00:00:00:01, ethertype IPv6 > (0x86dd), length 118: (hlim 255, next-header ICMPv6 (58) payload length: > 64) fe80::a671:74ff:fe2b:c137 > ff02::1: [icmp6 sum ok] ICMP6, router > advertisement, length 64 > hop limit 64, Flags [managed, other stateful], pref high, router > lifetime 1800s, reachable time 0s, retrans time 0s > prefix info option (3), length 32 (4): > 2605:8d80:6e3:7365::/64, Flags [onlink, auto], valid time 7200s, pref. > time 3600s > 0x0000: 40c0 0000 1c20 0000 0e10 0000 0000 2605 > 0x0010: 8d80 06e3 7365 0000 0000 0000 0000 > mtu option (5), length 8 (1): 1460 > 0x0000: 0000 0000 05b4 > source link-address option (1), length 8 (1): a4:71:74:2b:c1:37 > 0x0000: a471 742b c137 > 10:05:51.926817 0c:5b:8f:27:9a:64 > 33:33:ff:27:9a:64, ethertype IPv6 > (0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload length: > 32) :: > ff02::1:ff27:9a64: [icmp6 sum ok] ICMP6, neighbor solicitation, > length 32, who has 2605:8d80:6e3:7365:e5b:8fff:fe27:9a64 > unknown option (14), length 8 (1): > 0x0000: 0387 5e45 437d > > > And I have the IP6 addr assigned. > > ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > ether 0c:5b:8f:27:9a:64 > hwaddr 0c:5b:8f:27:9a:64 > inet6 fe80::e5b:8fff:fe27:9a64%ue0 prefixlen 64 scopeid 0x7 > inet 192.168.8.100 netmask 0xffffff00 broadcast 192.168.8.255 > inet6 2605:8d80:6e3:7365:e5b:8fff:fe27:9a64 prefixlen 64 autoconf > nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL> > > > But no default route ? Is this something the client has to ask for ? > Unfortunately, on the little USB LTE modem, there are no options to > fiddle with ipv6 settings. > > > # netstat -anr -6 > Routing tables > > Internet6: > Destination Gateway Flags > Netif Expire > ::/96 ::1 UGRS > lo0 > ::1 link#6 UH > lo0 > ::ffff:0.0.0.0/96 ::1 UGRS > lo0 > 2605:8d80:6e3:7365::/64 link#7 U > ue0 > 2605:8d80:6e3:7365:e5b:8fff:fe27:9a64 link#7 UHS > lo0 > fe80::/10 ::1 UGRS > lo0 > fe80::%lo0/64 link#6 U > lo0 > fe80::1%lo0 link#6 UHS > lo0 > fe80::%ue0/64 link#7 U > ue0 > fe80::e5b:8fff:fe27:9a64%ue0 link#7 UHS > lo0 > ff01::%lo0/32 ::1 U > lo0 > ff01::%ue0/32 fe80::e5b:8fff:fe27:9a64%ue0 U > ue0 > ff02::/16 ::1 UGRS > lo0 > ff02::%lo0/32 ::1 U > lo0 > ff02::%ue0/32 fe80::e5b:8fff:fe27:9a64%ue0 U > ue0 I haven't tried USB Ethernet, maybe there's an IPv6 issue with ue(4), I hope not. Anyway, in /etc/rc.conf, your interface lines should look something like: ifconfig_em0_ipv6="inet6 accept_rtadv" Also, ipv6_defaultrouter must be empty for SLAAC to work. -- Trond.
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