BIRD 3-node routed redundant ring

# Main BIRD configuration; generated with Ansible.
# Implements a 3-node direct connect redundant ring topology using OSPF and loopback interfaces
# Assumes an interface called "lo:0" which has on it a /32 address which acts as a "cluster address",
# and on which cluster services run.
# Assumes two interfaces called "eth2" and "eth3", which form point-to-point links with the adjacent
# nodes containing /30 subnets.

# Please log
log syslog { debug, trace, info, remote, warning, error, auth, fatal, bug };
router id {{ ansible_lo_0.ipv4.address }};

# Keep routes, and refresh the kernel table ever second. Import and export all routes.
protocol kernel {
        persist;
        scan time 1;
        import all;
        export all;
}

# Scan interfaces every second for state changes
protocol device {
        scan time 1;
}

# Static routes. These direct clients inbound from each point-to-point towards the cluster IP.
# Export to be learned by OSPF neighbours.
protocol static {
        export all;
        route {{ ansible_lo_0.ipv4.address }}/32 multipath
                via {{ ansible_eth2.ipv4.address }}
                via {{ ansible_eth3.ipv4.address }};
}

# BFD monitor. Not 100% sure if this is needed but I started with it (still learning BIRD).
protocol bfd monitor {
        interface "eth2" {
                interval 1 ms;
                min rx interval 10 ms;
                min tx interval 10 ms;
                idle tx interval 100 ms;
                multiplier 3;
        };
        interface "eth3" {
                interval 1 ms;
                min rx interval 10 ms;
                min tx interval 10 ms;
                idle tx interval 100 ms;
                multiplier 3;
        };
        multihop {
                interval 200 ms;
                multiplier 5;
        };
}

# The OSPF ring, with both point-to-point interfaces in area 0 with equal cost.
protocol ospf ring {
        rfc1583compat yes;
        tick 1;
        import all;
        export all;
        area 0 {
                interface "eth2" {
                        cost 1;
                        type pointopoint;
                        hello 5; retransmit 2; wait 10; dead 20;
                        authentication simple; password "testing";
                };
                interface "eth3" {
                        cost 1;
                        type pointopoint;
                        hello 5; retransmit 2; wait 10; dead 20;
                        authentication simple; password "testing";
                };
        };
}