Hi Cédric,
inheritance of filters is not supported, but you can make use of
functions (https://bird.nic.cz/doc/bird-2.18.html#filters) to not repeat
yourself.
We are glad that you are switching to v2/v3. You will most likely be
able to use the same exact configuration for v2 and v3.
Hope this helps and happy routing,
David
David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.
On 3/3/26 12:40, BASSAGET Cédric wrote:
Hello,
I'm trying to simplify my old bird 1.6 config, the aim is migrating to
v2 then v3.
I have a config like :
template bgp private_peering_ipv4 {
local as my_ans;
path metric 2;
ipv4 {
import all;
import filter {
if (net.len > 24 ) then reject;
bgp_large_community.add((my_asn, 1, 1003));
accept;
};
export filter export_my_routes_ipv4;
import keep filtered;
};
}
protocol bgp PEER_v4_peer1 from private_peering_ipv4 {
router id 195.42.145.x;
neighbor 195.42.144.104 as 6939;
}
protocol bgp PEER_v4_peer2 from private_peering_ipv4 {
router id 195.42.145.x;
neighbor 195.42.144.104 as 6939;
ipv4 {
import filter {
bgp_large_community.add((my_asn, 1, 1009));
accept;
};
};
}
the problem here is that as soon as I define a new import filter for
my second peer, the filter from the template is omitted.
Is there a way to add inheritance between the templates, or anything
else that wouldn't overwrite the template filters ?
Regards,
Cédric
