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The Raaper avatar Ubuntu

Enabling IPv6 on interface

es flag
The Raaper

I have a lot of trouble enabling IPv6 on physical interface, everything seems enabled or not disabled:

$ ifconfig enp1s0

enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.254  netmask 255.255.255.0  broadcast 192.168.0.255
        ether 7c:d3:0a:10:1d:0e  txqueuelen 1000  (Ethernet)
        RX packets 2567213  bytes 1896259903 (1.8 GB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4022172  bytes 4859940550 (4.8 GB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ sudo sysctl -p

net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv4.ip_forward = 1

$ cat /etc/default/grub

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX=""

Webmin isn't helping either IPv6 always returns to disabled, Even if I enable IPv6 discovery and save, On the list loopback and Docker both show up with IPv6.

$ cat /etc/os-release

NAME="Ubuntu"
VERSION="20.04.3 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.3 LTS"
VERSION_ID="20.04"

$ cat /etc/netplan/00-installer-config.yaml

network:
  ethernets:
        enp1s0:
            addresses: ['192.168.0.254/24']
            gateway4: 192.168.0.1
            nameservers:
                addresses: [1.1.1.1, 8.8.8.8, 127.0.0.53]
  version: 2

I think I'm starting to see what needs to be done.

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in flag
matigo
Could you [edit] your question to include which version of Ubuntu you're running? It looks like you're running Debian ...
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Thomas Aichinger avatar
cn flag
Thomas Aichinger
It seems you did not configure your ipv6 interface. Please also post your netplan yaml file.
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The Raaper avatar Ubuntu
es flag
The Raaper

I have found what needed to be done: I needed to add dhcp3: yes to the interface in /etc/netplan/00-installer-config.yaml file.

        enp1s0:
            dhcp4: no
            dhcp6: yes

I have added dhcp4: no just to be safe.

Thanks Thomas Aichinger for pointing out this file.

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