ipv6 host inaccessible via route -inteface without ndp pairs
Mr Dandy
subbsd at gmail.com
Sat Feb 25 18:36:00 UTC 2012
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
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 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
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