# {{ ansible_managed }}

{% for host in groups['gateways'] %}
{% if host != inventory_hostname %}
auto bck-{{host}}
iface bck-{{host}} inet static
{% if hostvars[host].vm_id < vm_id %}
        address 192.168.{{ hostvars[host].vm_id-1 }}.{{vm_id*2+1}}
{% else %}
        address 192.168.{{ vm_id-1 }}.{{hostvars[host].vm_id*2}}
{% endif %}
        netmask 31
        pre-up ip link add $IFACE type gre local {{ansible_default_ipv4.address}} remote {{hostvars[host].ansible_ssh_host}} ttl 255
        pre-up ip link set $IFACE up multicast on
        post-up ip rule add iif $IFACE table ffnet
        pre-down ip rule del iif $IFACE table ffnet ||:

iface bck-{{host}} inet6 static
{% if hostvars[host].vm_id < vm_id %}
        address {{ipv6backbone64prefixstr}}{{hostvars[host].vm_id}}:{{vm_id}}:0
{% else %}
        address {{ipv6backbone64prefixstr}}{{vm_id}}:{{hostvars[host].vm_id}}:1
{% endif %}
        netmask 127
        post-up ip -6 rule add iif $IFACE table ffnet
        pre-down ip -6 rule del iif $IFACE table ffnet ||:
        post-down ip link delete $IFACE

{% endif %}
{% endfor %}