For some time I am struggling with configuration of IPv6 in my Ubuntu VPS. I followed many tutorials on this matter, but none worked for me. The problem is, when I use one-time configuration in console:
ip addr add 2001:41D0:401:3000::XXXX/128 dev eth0 ip -6 route add 2001:41D0:401:3000::1 dev eth0 ip -6 route add default via 2001:41D0:401:3000::1 dev eth0
Everything is OK (of course I replaced last part of my IP with
However when I tried to put these into my
/etc/network/interfaces, after reboot I am left with only autoconfig IPv6 address.
No matter what I tried to enter into this file, what I get on
ip addr show eth0 (
eth0 is my interface) is:
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether fa:16:3e:7e:48:85 brd ff:ff:ff:ff:ff:ff inet 164.132.XXX.XXX/32 brd 164.132.XXX.XXX scope global eth0 valid_lft forever preferred_lft forever inet 145.239.XXX.XXX/32 brd 145.239.XXX.XXX scope global eth0:0 valid_lft forever preferred_lft forever inet6 fe80::f816:3eff:fe7e:4885/64 scope link valid_lft forever preferred_lft forever
I have 2 IPv4 addresses, and they both work, but I'd love to have IPv6 too. I have one assigned by OVH.
# The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 164.132.XXX.XXX netmask 255.255.255.255 post-up /sbin/ip route add 164.132.XXX.1 dev eth0 post-up /sbin/ip route add default via 164.132.XXX.1 post-up /sbin/ifconfig eth0:0 145.239.XXX.XXX netmask 255.255.255.255 broadcast IP_FAIL_OVER pre-down /sbin/ifconfig eth0:0 down pre-down /sbin/ip route del default via 164.132.XXX.1 pre-down /sbin/ip route del 164.132.XXX.1 dev eth0 dns-nameserver 220.127.116.11 dns-search ovh.net iface eth0 inet6 static address 2001:41D0:401:3000::XXXX netmask 128 post-up /sbin/ip -6 route add 2001:41D0:401:3000::1 dev eth0 post-up /sbin/ip -6 route add default via 2001:41D0:401:3000::1 dev eth0 pre-down /sbin/ip -6 route del default via 2001:41D0:401:3000::1 dev eth0 pre-down /sbin/ip -6 route del 2001:41D0:401:3000::1 dev eth0 auto eth0:0 iface eth0:0 inet static address 145.239.XXX.XXX netmask 255.255.255.255
I also tried adding IPv6 like this:
iface eth0 inet6 static address 2001:41D0:401:3000::XXXX netmask 128 gateway 2001:41D0:401:3000::1
and with full (expanded) IP addresses, but without any success.
net.ipv6.conf.eth0.autoconf=0 net.ipv6.conf.default.autoconf=0 net.ipv6.conf.all.autoconf=0 net.ipv6.conf.eth0.accept_ra=0
to my sysctl.conf, as OVH tutorial and some other suggested, but it didn't change anything, whether it was there or not.
Between each check I rebooted whole machine, to make sure all configs were reloaded, and as
service networking restart fails with
sty 04 15:54:21 vpsXXXXXX.ovh.net ifup: RTNETLINK answers: File exists sty 04 15:54:21 vpsXXXXXX.ovh.net ifup: Failed to bring up eth0. sty 04 15:54:21 vpsXXXXXX.ovh.net ifup: RTNETLINK answers: File exists sty 04 15:54:21 vpsXXXXXX.ovh.net ifup: Failed to bring up eth0:0. sty 04 15:54:21 vpsXXXXXX.ovh.net systemd: networking.service: Main process exited, code=exited, status=1/FAILURE sty 04 15:54:21 vpsXXXXXX.ovh.net systemd: Failed to start Raise network interfaces.
Thank you very much for all your help and I will be glad to provide more information if needed.