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

{% if peers is defined %}
{% for peer in peers %}
{% if peer.gre_endpoint is defined %}
auto {{peer.name}}
iface {{peer.name}} inet tunnel
    mode gre
    ttl 64
    mtu 1400
    netmask 255.255.255.255
    address {{peer.source_ipv4}}
    dstaddr {{peer.peer_ipv4}}
    local {{primary_v4_address}}
    endpoint {{peer.gre_endpoint}}

iface {{peer.name}} inet6 static
    address {{peer.source_ipv6}}

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