On Sun, May 15, 2011 at 04:36:29PM +0200, Pascal Hambourg wrote: > Hello, > > Eugen Leitl a écrit : > > I've got a /56 from which I assigned to eth0 a > > 2a01:4f8:7d:300::2, with the gateway 2a01:4f8:7d:300::1 > > > > I can ping the assigned address from outside (another > > machine with a sixx tunnel), but no dice with e.g. > > ping6 ipv6.google.com > > PING ipv6.google.com(2a00:1450:8005::68) 56 data bytes > > > > It looks like a route problem. My routes look like > > > > route --inet6 > > The output of ip -6 addr and ip -6 route may be more compact.
You were correct, IPv6 autoconfiguration was the culprit. It is very annoying to switch off, I had to use the recipe from https://tools.bitfolk.com/wiki/IPv6 What worked for me (from /etc/network/interfaces ): # WAN IPv6 from 2a01:4f8:7d:300::/56 iface eth0 inet6 static address 2a01:4f8:7d:300::2 gateway 2a01:4f8:7d:300::1 netmask 64 # Disable autoconf post-up echo 0 > /proc/sys/net/ipv6/conf/default/accept_ra post-up echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra post-up echo 0 > /proc/sys/net/ipv6/conf/$IFACE/accept_ra post-up echo 0 > /proc/sys/net/ipv6/conf/default/autoconf post-up echo 0 > /proc/sys/net/ipv6/conf/all/autoconf post-up echo 0 > /proc/sys/net/ipv6/conf/$IFACE/autoconf Thanks! > > Kernel IPv6 routing table > > Destination Next Hop Flag Met Ref Use > > If > > 2a01:198:200::/64 :: UAe 256 0 3 > > eth0 > > 2a01:4f8:7d:300::/56 :: U 256 0 1 > > eth0 > > IMO the prefix length for any local prefix should always be /64. The > purpose of a /56 prefix is to be divided into multiple /64 prefixes. > > > ::/0 2a01:4f8:7d:300::1 UG 1024 0 1 > > eth0 > > ::/0 fe80::2e0:81ff:fe58:58b3 UGDAe 1024 0 0 > > eth0 > > 2a01:198:200:0:225:90ff:fe02:326e/128 :: Un 0 1 3 > > lo > > 2a01:4f8:7d:300::2/128 :: Un 0 1 6 > > lo > > It looks like eth0 has also got a prefix 2a01:198:200::/64 and default > router from stateless autoconfiguration (a router on the link sends > advertisements for this prefix). Maybe your box uses the wrong source > prefix and router combination when sending packets. If you don't want > eth0 to use stateless autoconfiguration, you can disable by setting > /proc/sys/net/ipv6/conf/eth0/autoconf to 0. > > > -- > To UNSUBSCRIBE, email to [email protected] > with a subject of "unsubscribe". Trouble? Contact [email protected] > Archive: http://lists.debian.org/[email protected] -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
