Adjust these values to your environment

OS	Container Engine	Network Plugin	Container IPv6 pool	NIC
Fedora Server 37	podman	netavark	2000:10:200:30fc::/64	enp2s0f0

NetworkManager

I assigned an IPv6-prefix from another pool to enp2s0f0 with my default gateway (fe80::1%enp2s0f0).

Podman

# install podman & netavark
sudo dnf install podman netavark

# copy the default containers.conf & set netavark as network plugin
sed 's|#network_backend = ""|network_backend = "netavark"|g' /usr/share/containers/containers.conf | sudo tee /etc/containers/container.conf

Create the podman network

Option 1

podman network create --ignore --subnet=2000:10:200:30fc::/64 --ipv6 systemd-v6

Option 2

This option lets you take advantage of podman-systemd.

cat <<'EOF' |  sudo tee /etc/containers/systemd/v6.network
[Network]
IPv6=true
Subnet=2000:10:200:30fc::/64
EOF

Which means you're able to reference the network in a container unit like so:

cat <<'EOF' |  sudo tee /etc/containers/systemd/traefik.container

[Unit]
Description=The Cloud Native Application Proxy
After=local-fs.target

[Container]
Image=docker.io/traefik:v3.0

PublishPort=80:80
PublishPort=443:443

Network=v6.network
PodmanArgs=--ip6=2000:10:200:30fc::2
PodmanArgs=--volume /opt/traefik:/etc/traefik
PodmanArgs=--volume /var/run/podman/podman.sock:/var/run/docker.sock
PodmanArgs=--security-opt label:disable

[Install]
WantedBy=multi-user.target
EOF

Finish up by reloading via systemctl so that real unit files are generated:

sudo systemctl daemon-reload

ndppd

sudo dnf install ndppd

sudo mv /etc/ndppd.conf /etc/ndppd.conf.orig

cat <<'EOF' | sudo tee /tmp/ndppd.conf
route-ttl 30000
proxy enp2s0f0 {
   router yes
   timeout 500
   ttl 30000
   rule 2000:10:200:30fc::/64 {
      static
   }
}
EOF

xanderificnl/Routeable IPv6 Containers.md