Date: Sat, 25 Feb 2012 18:47:50 +0000 From: Vlad Galu <dudu@dudu.ro> To: Mr Dandy <subbsd@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: ipv6 host inaccessible via route -inteface without ndp pairs Message-ID: <371110A7FCE442FA8189BEDF90DF6451@dudu.ro> In-Reply-To: <201202252213.50760.subbsd@gmail.com> References: <201202252213.50760.subbsd@gmail.com>
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-- Good, fast and cheap: pick any two. On Saturday, February 25, 2012 at 6:13 PM, Mr Dandy wrote: > Hi > > I play with IPv6 on the Hezner hosting. According to > http://wiki.hetzner.de/index.php/Zusaetzliche_IP-Adressen/en information my > rc.conf have (FreeBSD 9.0-RELEASE/amd64): > --- > ipv6_activate_all_interfaces="YES" > ipv6_static_routes="hetzner" > ipv6_route_hetzner="2a01:4f8:61:50c0::/59 -iface re0" > ifconfig_re0_ipv6="inet6 2a01:4f8:61:50c2::13/64" > ipv6_defaultrouter="2a01:4f8:61:50c0::1" > ipv6_gateway_enable="YES" > -- > > Pictures after boot: > > # ifconfig re0 inet6 > re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > options=389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC> > inet6 2a01:4f8:61:50c2::13 prefixlen 64 > inet6 fe80::224:21ff:fe2c:6943%re0 prefixlen 64 scopeid 0x1 > nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> > > # route get -inet6 2a01:4f8:61:50c0::1 > route to: 2a01:4f8:61:50c0::1 > destination: 2a01:4f8:61:50c0:: > mask: ffff:ffff:ffff:ffe0:: > interface: re0 > flags: <UP,DONE,STATIC> > recvpipe sendpipe ssthresh rtt,msec mtu weight expire > 0 0 0 0 1500 1 0 > > # route get -inet6 default > route: writing to routing socket: No such process > > # ping6 -c1 2a01:4f8:61:50c0::1 > PING6(56=40+8+8 bytes) 2a01:4f8:61:50c2::13 --> 2a01:4f8:61:50c0::1 > ping6: sendmsg: Operation not permitted > ping6: wrote 2a01:4f8:61:50c0::1 16 chars, ret=-1 > > --- 2a01:4f8:61:50c0::1 ping6 statistics --- > 1 packets transmitted, 0 packets received, 100.0% packet loss > > - is inaccessible. > > This situation changes when ip/mac pairs already presents in NDP list (by ndp > -s pairs or static_ndp_pairs in /etc/rc.conf) > > # ndp -s 2a01:4f8:61:50c0::1 00:26:88:75:ed:06 > > ( I took MAC by registered the my ip in /59 network and touching > 2a01:4f8:61:50c0::1 by ping6 ) > > # route add -inet6 -host 2a01:4f8:61:50c0::/59 -iface re0 > add net 2a01:4f8:61:50c0::/59: gateway re0 > > # ping6 -c1 2a01:4f8:61:50c0::1 > PING6(56=40+8+8 bytes) 2a01:4f8:61:50c2::13 --> 2a01:4f8:61:50c0::1 > 16 bytes from 2a01:4f8:61:50c0::1, icmp_seq=0 hlim=64 time=2.341 ms > > --- 2a01:4f8:61:50c0::1 ping6 statistics --- > 1 packets transmitted, 1 packets received, 0.0% packet loss > round-trip min/avg/max/std-dev = 2.341/2.341/2.341/0.000 ms > > # route add -inet6 default 2a01:4f8:61:50c0::1 > add net default: gateway 2a01:4f8:61:50c0::1 > > # ping6 -c1 www.freebsd.org (http://www.freebsd.org) > PING6(56=40+8+8 bytes) 2a01:4f8:61:50c2::13 --> 2001:4f8:fff6::22 > 16 bytes from 2001:4f8:fff6::22, icmp_seq=0 hlim=54 time=163.879 ms > > --- red.freebsd.org (http://red.freebsd.org) ping6 statistics --- > 1 packets transmitted, 1 packets received, 0.0% packet loss > round-trip min/avg/max/std-dev = 163.879/163.879/163.879/0.000 ms > > All fine while ndp have cache: > > # ndp -a > Neighbor Linklayer Address Netif Expire S > Flags > fe80::226:88ff:fe75:ed06%re0 00:26:88:75:ed:06 re0 23h52m6s S R > 2a01:4f8:61:50c0::1 00:26:88:75:ed:06 re0 23h59m58s S R > <my hostname here> 00:24:21:2c:69:43 re0 permanent R > fe80::224:21ff:fe2c:6943%re0 00:24:21:2c:69:43 re0 permanent R > > # ndp -d 2a01:4f8:61:50c0::1 > 2a01:4f8:61:50c0::1 (2a01:4f8:61:50c0::1) deleted > > # ping6 -c1 2a01:4f8:61:50c0::1 > PING6(56=40+8+8 bytes) 2a01:4f8:61:50c2::13 --> 2a01:4f8:61:50c0::1 > ping6: sendmsg: Operation not permitted > ping6: wrote 2a01:4f8:61:50c0::1 16 chars, ret=-1 > ^C > --- 2a01:4f8:61:50c0::1 ping6 statistics --- > 1 packets transmitted, 0 packets received, 100.0% packet loss You might need to add ipv6_default_interface="re0" to /etc/rc.conf. After you do that, it will have ACCEPT_RTADV and DEFAULTIF set. Also, see http://social.bitmand.com/post/1168584251/hetzner-freebsd-and-ipv6.
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