[tor-relays] Multiple fingerprints for same IP:Port combo

Hi, Is it possible to have multiple Tor-nodes (with different keypair and fingerprint) at the same IP-Port combination? Or does that not work with the Directory implementation? The idea would be to have nodes under an anycast IP, because the anycast network has a lot of unused capacity. Another possibilty is to replicate the same node and re-use the same keypair in multiple physical locations for the same anycast IP, but I'm not sure this is a good idea. Simon