bird6.conf:

# This file is managed by ansible, don't make changes here - they will be overwritten.
log syslog { debug, trace, info, remote, warning, error, auth, fatal, bug };
router id 5;

table ffnet;

filter freifunk {
	if net ~ 2a03:2260:2004::/48 then accept;
	reject;
}

protocol kernel {
	scan time 20;
	import all;
	export all;
	table ffnet;
	kernel table 42;
	device routes;
	persist;
};

protocol radv {
	interface "bat03" {
		max ra interval 20;
		link mtu 1280;
		prefix 2a03:2260:2004:300::/64 {
		};
		rdnss {
			ns 2a03:2260:2004:300::5;
		};
		dnssl "fflip";
	};
	interface "bat04" {
		max ra interval 20;
		link mtu 1280;
		prefix 2a03:2260:2004:400::/64 {
		};
		rdnss {
			ns 2a03:2260:2004:400::5;
		};
		dnssl "fflip";
	};
};


protocol bfd {
	table ffnet;
	interface "gre*";
	interface "bck*";
	multihop {
		passive;
	};
};

protocol device {
	scan time 10;
};

protocol ospf {
	table ffnet;
	import filter freifunk;
	export all;
	area 0.0.0.0 {
		interface "bat*" {
			stub;
		};
		interface "bck-*";
		interface "lo" {
			stub;
		};
	};
};

function is_default() {
	return (net ~ [::/0]);
};

filter export_to_upstream_filter {
	if source = RTS_OSPF_EXT2 then reject;
	if net ~ [2a03:2260:2004::/48{48,56}] then accept;
	reject;
};

protocol static static_domaene03 {
	table ffnet;
	route 2a03:2260:2004:300::/56 reject;
};
protocol static static_domaene04 {
	table ffnet;
	route 2a03:2260:2004:400::/56 reject;
};

protocol kernel 'kernel_master' {
	scan time 20;
	table master;
	kernel table 254;
	import all;
	export all;
	persist;
};

protocol static {
	table master;
	import all;
	export none;
};

protocol direct {
	interface "lo";
	interface "tun-ffrl*";
	interface "gre-*";
	interface "bck-*";
	interface "bat*";
	table ffnet;
}

template bgp internal {
	table ffnet;
	local as 64884;
	import filter {
		if is_default() then
			preference = 99;
		else
			preference = 160;
		accept;
	};
	export filter {
		if source = RTS_BGP then accept;
		else reject;
	};
	gateway direct;
	direct;
	next hop self;
};

protocol bgp ibgp_hermann from internal {
	neighbor 2a03:2260:115:ffa1::2:5:1 as 64884;
}

protocol bgp ibgp_arminius from internal {
	neighbor 2a03:2260:115:ffa1::3:5:1 as 64884;
}

protocol bgp ibgp_varus from internal {
	neighbor 2a03:2260:115:ffa1::4:5:1 as 64884;
}


template bgp uplink {
	table ffnet;
	local as 64884;
	import where is_default();
	export filter export_to_upstream_filter;
	gateway recursive;
}

protocol bgp ffrl_dus1 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:366::2;
	neighbor 2a03:2260:0:366::1 as 201701;
};

protocol bgp ffrl_dus2 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:369::2;
	neighbor 2a03:2260:0:369::1 as 201701;
};

protocol bgp ffrl_fra1 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:365::2;
	neighbor 2a03:2260:0:365::1 as 201701;
};

protocol bgp ffrl_fra2 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:368::2;
	neighbor 2a03:2260:0:368::1 as 201701;
};

protocol bgp ffrl_ber1 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:364::2;
	neighbor 2a03:2260:0:364::1 as 201701;
};

protocol bgp ffrl_ber2 from uplink {
	description "Rheinland Backbone";
	source address 2a03:2260:0:367::2;
	neighbor 2a03:2260:0:367::1 as 201701;
};