{% if item == "main" %}
{% set gre_ip = gre_main_ip %}
{% set remote_wan = remote_main_isp_ip %}
{% elif item == "backup" %}
{% set gre_ip = gre_backup_ip %}
{% set remote_wan = remote_backup_isp_ip %}
{% endif %}
network:
  version: 2
  tunnels:
    gre-{{ item }}:
      mode: gre
      local: {{ wan_ip }}
      remote: {{ remote_wan }}
      addresses:
        - {{ gre_ip }}/30
      mtu: 1360
      dhcp4: no
      dhcp6: no