I'm experimenting running my own tor network. To achieve this I'm setting DirAuthority in torrc.

But it seems that I cannot use a hostname for my DirAuthority. For example:

Results in the error:

 

If I replace "da1" with an IP address there is no error. Is this expected behaviour? I'm running tor v0.2.8.12. The documentation calls this an "address" (as opposed to other parts which refer to an "IP") which made me think a hostname would work.

Thanks