Debian, docker, macvlan and static IPv6

# Problem I am trying to setup a local DNS server (pihole) inside a docker container on my debian 11 server in my home network with a static IPv6, such that I can point all lookups from my router to it. # What I have so far * As this is a home network, my router reconnects in certain intervals, which does not allow me to use theglobal IPv6 prefix. * `docker` service is running on my server * I'm using docker-compose, the compose file looks like this currently: version: "3" # More info at https://github.com/pi-hole/docker-pi-hole/ and https://docs.pi-hole.net/ services: pihole: container_name: pihole image: pihole/pihole:latest ports: - "53:53/tcp" - "53:53/udp" - "67:67/udp" - "80:80/tcp" environment: TZ: 'Europe/Berlin' # WEBPASSWORD: 'set a secure password here or it will be random' WEBPASSWORD: 'XXXXXXXXX' # Volumes store your data between container upgrades volumes: - type: bind source: ./etc-pihole/ target: /etc/pihole/ - type: bind source: ./etc-dnsmasq.d target: /etc/dnsmasq.d/ # Recommended but not required (DHCP needs NET_ADMIN) # https://github.com/pi-hole/docker-pi-hole#note-on-capabilities cap_add: - NET_ADMIN #option not needed wen used in combinationwith systemd #restart: unless-stopped networks: macvlan: ipv4_address: 10.10.1.51 ipv6_address: fd00:0:0:1:50::51 networks: macvlan: driver: macvlan enable_ipv6: true driver_opts: parent: enp7s0 ipam: config: - subnet: 10.10.1.50/24 gateway: 10.10.1.1 - subnet: fd00:0:0:1:50::/80 gateway: fd00:0:0:1:2e91:abff:fe91:baa0 * The whole IPv4 setup is working, however I do not fully understand how to setup the macvlan, such that the dockered pihole can work as a DNS server in my home network. * The `fd00:0:0:1:2e91:abff:fe91:baa0` is the local address of my router. * `docker-compose up` yields: failed to create network dc_pihole_macvlan: Error response from daemon: Invalid subnet fd00:0:0:1:50:/80 : invalid CIDR address: fd00:0:0:1:50:/80 # Questions * Is what I am trying to do feasible at all? * Is this the correct setup for what I am trying to do? * How can I get the container to start? # Edits 1 * After the suggested syntax fixes,the docker container starts. From a bash inside the container, I can ping my router at `fd00:0:0:1:2e91:abff:fe91:baa0. I can also ping ipv6.google.com and it gets resolved to the correct IPv6, but strangely, only one of four packets is transmitted. Why? See attached output, where PROVIDER-PREFIX-RM` is my (current) scope global prefix: root@c4ca40297eaa:/# ping ipv6.google.com -c 4 PING ipv6.google.com(fra24s11-in-x0e.1e100.net (2a00:1450:4001:830::200e)) 56 data bytes From PROVIDER-PREFIX-RM:42:aff:fe0a:133 (PROVIDER-PREFIX-RM:42:aff:fe0a:133): icmp_seq=1 Destination unreachable: Address unreachable From PROVIDER-PREFIX-RM:42:aff:fe0a:133 (PROVIDER-PREFIX-RM:42:aff:fe0a:133): icmp_seq=2 Destination unreachable: Address unreachable From PROVIDER-PREFIX-RM:42:aff:fe0a:133 (PROVIDER-PREFIX-RM:42:aff:fe0a:133): icmp_seq=3 Destination unreachable: Address unreachable 64 bytes from fra24s11-in-x0e.1e100.net (2a00:1450:4001:830::200e): icmp_seq=4 ttl=115 time=18.7 ms --- ipv6.google.com ping statistics --- 4 packets transmitted, 1 received, +3 errors, 75% packet loss, time 95ms rtt min/avg/max/mdev = 18.738/18.738/18.738/0.000 ms, pipe 3 * Addendum: Obviously I am new to this, so if you feel like suggesting a betternumbering scheme, by all means, do.