Intricacies of working with two virtual machine clones

Even if you have two vm clones with different mac addresses, you need to tell ubuntu how exactly the machine identifies itself on the network for the two clones to get separate ip addresses.

Measuring Speed Between Computers

sudo apt install -y iperf computer 1: iperf -s Computer 2:

Simple Netplan Config

Example update enp0s3 to match your ethernet interface update ip4 address to match an available address

Tailscale Details

from here about exit nodes and subnets IP Forwarding echo 'net.