[SOLVED] IPv6 on Containers doesn't work

[exii88]

Hello,

i want to use IPv6 Adresses from my subnet on my containers.

But on the containers are only an default ip or so, but i configured the right ip.

Host network config:

### Hetzner Online GmbH - installimage
# Loopback device:
auto lo
iface lo inet loopback
iface lo inet6 loopback

# device: eth0
auto  eth0
iface eth0 inet static
  address   xxx.xxx.xxx.xxx
  netmask   255.255.255.255
  gateway   xxx.xxx.xxx.xxx
  pointopoint xxx.xxx.xx.xxx

iface eth0 inet6 static
  address xxxx:xxx:xxx:xxxx::2
  netmask 128
  gateway fe80::1
  up sysctl -p

# device: vmbr0
auto vmbr0
iface vmbr0 inet static
  address xxx.xxx.xxx.xxx
  netmask 255.255.255.255
  bridge_ports none
  bridge_stp off
  bridge_fd 0
  up ip route add xxx.xxx.xxx.xxx/32 dev vmbr0
  up ip route add xxx.xxx.xxx.xxx/32 dev vmbr0
  up ip route add xxx.xxx.xxx.xxx/32 dev vmbr0

iface vmbr0 inet6 static
  address xxxx:xxx:xxx:xxxx::2
  netmask 64

# device: vmbr1
auto vmbr1
iface vmbr1 inet static
  address 192.168.99.1
  netmask 255.255.255.0
  bridge_ports none
  bridge_stp off
  bridge_fd 0
  post-up iptables -t nat -A POSTROUTING -s '192.168.99.0/24' -o eth0 -j MASQUERADE
  post-down iptables -t nat -D POSTROUTING -s '192.168.99.0/24' -o eth0 -j MASQUERADE

VM Container network config:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
    address xxx.xxx.xxx.xxx
    netmask 255.255.255.255
# --- BEGIN PVE ---
    post-up ip route add xxx.xxx.xxx.xxx dev eth0
    post-up ip route add default via xxx.xxx.xxx.xxx dev eth0
    pre-down ip route del default via xxx.xxx.xxx.xxx dev eth0
    pre-down ip route del xxx.xxx.xxx.xxx dev eth0
# --- END PVE ---
    post-up ip route add xxx.xxx.xxx.xxx dev eth0
    post-up ip route add default via xxx.xxx.xxx.xxx
    pre-down ip route del default via xxx.xxx.xxx.xxx
    pre-down ip route del xxx.xxx.xxx.xxx dev eth0

iface eth0 inet6 static
    address xxxx:xxx:xxx:xxxx::101
    netmask 64
    gateway xxxx:xxx:xxx:xxxx::2

auto eth1
iface eth1 inet static
    address 192.168.99.101
    netmask 255.255.255.0
    gateway 192.168.99.1

With this config i get the following ifconfig for eth0 on my VM:

eth0      Link encap:Ethernet  Hardware Adresse xx:xx:xx:xx:xx:xx 
          inet Adresse:xxx.xxx.xxx.xxx  Bcast:xxx.xxx.xxx.xxx  Maske:255.255.255.255
          inet6-Adresse: fe80::6031:61ff:fe39:3764/64 Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:6092 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4191 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000
          RX bytes:899025 (877.9 KiB)  TX bytes:752223 (734.5 KiB)

Thanks for any help

 

[wbumiller]

The routing section in your container's config is doubled. remove the parts outside the PVE marked section (or both and restart the container).
Most likely the commands error and debian's insanely intelligent networking stops after that and doesn't get to the ipv6 section.

 

[exii88]

Thanks that works. I don't think that way...