---
ansible_python_interpreter: /usr/bin/python3
ansible_host: "{{ inventory_hostname }}.federez.net"
infra__byte_a: "{{ infra__id // 256 }}"
infra__byte_b: "{{ infra__id % 256 }}"
infra__addr_v6: "fd0a:66d3:1c19:42::{{ infra__byte_a }}:{{ infra__byte_b }}"
infra__addr_v4: "10.42.{{ infra__byte_a }}.{{ infra__byte_b }}"
...