anondroid:
Out of curiosity, I wonder how the Tor network handles this? Do the directory authorities drop one (or both) from the consensus?
There are no "two" relays for one fingerprint since relays are "addressed" (named) by their keys (fingerprints). If one starts another relay with the same key it will be treated by the authorities as new descriptor for this key, i.e. another one will be pushed out from consensus.
From another side, only two relays (read keys) are allowed per one IP
address. Thus other than two relays on given IP address will also be pushed out from consensus.
-- Ivan Markin