How to create multiple addresses using netplan in Ubuntu 18.04?

Question

How to create multiple addresses using netplan in Ubuntu 18.04? I want to assign 50 addresses using notation like 192.10.23.1/24-192.10.23.50/24. Is it possible?

Answer 1

It's certainly possible.

Here you can file lots of examples on how to configure netplan for various use cases. For your specific needs it should be as simple as

network:
  version: 2
  renderer: networkd
  ethernets: 
    enp3s0:                     # Use your interface name
     addresses:
       - 192.10.23.1/24
       - 192.10.23.2/24
       - ...                    # fill all 50 addresses
       - 192.10.23.50/24
     gateway4: 192.10.23.254/24 # use your gateway, or none if it's not needed

I've used this as a reference.

Don't forget to do a sudo netplan apply to commit your changes.

Answer 2

I can't see any range option in netplan configuration. What I can only suggest is to use script, for example in Bash to generate your range:

gen.sh:
#!/bin/bash

for i in {1..50}
do
echo "    - 192.10.23.$i/24" # <-- watch for spaces :)
done

Then:

$ bash gen.sh > config.yml

Add some header / footer and you're done Cheers, Paweł