IPv6 Configuration

IPv6 is enabled by default. Stateless address autoconfiguration is used to automatically assign IPv6 addresses to all interfaces. You can disable IPv6 support globally by setting:

networking.enableIPv6  = false;

You can disable IPv6 on a single interface using a normal sysctl (in this example, we use interface eth0):

boot.kernel.sysctl."net.ipv6.conf.eth0.disable_ipv6" = true;

As with IPv4 networking interfaces are automatically configured via DHCPv6. You can configure an interface manually:

`networking.interfaces.eth0.ipv6.addresses <None>`_  = [ {
  address = "fe00:aa:bb:cc::2";
  prefixLength = 64;
} ];

For configuring a gateway, optionally with explicitly specified interface:

networking.defaultGateway6  = {
  address = "fe00::1";
  interface = "enp0s3";
};

See IPv4 Configuration for similar examples and additional information.