This is exactly what I wrote earlier:
From the practical point of view you can have more than a one node in the same /24 subnet of public IPs if:
- you have a few empty drives but less than needed to build a RAID6/RAID10;
- you do not have RAID6/RAID10 and do not want to build it or waste disks for redundancy;
- your hardware is not so fast (for example - raspberry pi3).
In those cases the traffic will be distributed between your nodes. In summary they can receive only as a one node, so it would be a native kind of RAID 
, but in case of drive failure you will lost only that one node not everything, all other will still working.
You can read more there: RAID vs No RAID choice