Hi Marek, On Thu, Jan 15, 2026 at 09:09:39AM +0100, Marek Zarychta via Bird-users wrote:
> After upgrade we spotted small regression with AS-SETs in both 2.18 and 3.2: That's not a bug, that's a feature specified in RFC 9774. We have changed the default behavior. > W dniu 3.01.2026 o 22:44, Maria Matejka via Bird-users pisze: > > Also, AS Sets in AS Paths are now considered malformed by default. If you need to accept AS Sets, you have to [explicitly enable them](https://bird.nic.cz/doc/bird-3.2.0.html#bgp-allow-as-sets). Have a nice day! Maria -- Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
