both virtual machines have same ip code example

Example: virtualbox machines have same ip

In VirtualBox control panel go to File -> Preferences -> Network

Select NAT Networks tab, create a new "NatNetwork" by clicking + button at side and press OK.

Now select each VM go to Settings -> Network

In Attached to: option choose NAT Network and select "NatNetwork" and press OK.

Restart all the VMs.

Now VMs have different network address.