When working on T219404: rack/setup/install restbase10[19-27].eqiad.wmnet me and @Eevans discovered that the current restbase eqiad hosts physically in row C have their cassandra rack set to B (!). This discrepancy has always been there but somehow we've never run into big problems because of it. Since we're going to decom most of the misplaced hosts anyways as part of the parent task, we're going with this discrepancy a little while longer.
When the parent task is finished, the only host to be misplaced will be restbase1017, for which we'll have to decom in cassandra, physically move to row B, reimage with new IPs and let it join the cluster again.