Running BIRD on different namespaces

Hi all, I'm looking for some guidance on running two separate instances of BIRD in two different network namespaces. Do you think it's better to specify two different config files for each namespace, or can I manage both instances using a single config file? I've tried using the following commands to run different config files: sudo ip netns exec netns1 bird -c /etc/bird/bird1.conf sudo ip netns exec netns2 bird -c /etc/bird/bird2.conf But it gives the error: I found another BIRD running, so it looks like BIRD can have only a single process running at once. Any insights on how to resolve this? Thanks!