Duplicate name and ip on the network?

Question

linux

The question is, is it possible to create a clone of the server inside the grid with a name and ip to check the key, to make a snag, unfortunately the key is bound by ip and name, and there is no way to stop the production server.

Answer 1

Allocate a separate VLAN for these purposes, it will be possible to use the same address and name there.

Answer 2

look towards CARP - a network protocol whose main task is to use one IP address by several hosts within a network segment.
There is also such a thing VRRP

Answer 3

try to make another poppy address the same. can ride.