ffdo-ansible/roles/internal/ffdo.peering/templates/peering_interfaces.j2

{% if peers is defined %}
{% for peer in peers %}
{% if peer.gre is defined %}
auto gre-{{peer.name}}
iface gre-{{peer.name}} inet tunnel
    mode gre
    address {{peer.gre.ip|ipaddr('address')}}
    dstaddr {{peer.peer_ip4}}
    netmask {{peer.gre.ip|ipaddr('netmask')}}
    local {{ansible_default_ipv4.address}}
    endpoint {{peer.gre.endpoint}}
    mtu 1400
    ttl 64

iface gre-{{peer.name}} inet6 static
    address {{peer.gre.ip6}}

{% endif %}
{% endfor %}
{% endif %}