Netplan: Add guidance on setting up how-to environment

Context

Three of the how-to guides for Netplan feature very similar scenarios, and all of them start with the user having to configure their environment in a specific way. These are the how-tos:

• How to configure a VM host with a single network interface
• How to configure a VM host with a single network interface and three VLANs
• How to configure a VM host with bonded network interfaces and three VLANs

In the beginning of each how-to, the user is asked to set up their networking, but specific instructions on how to perform such set up are missing.

Task

Either develop the content (instructions) on how to set up the environment at the beginning of each how-to and include it in the how-tos, or find suitable instructions in other docs and link to them (such as in existing Netplan how-tos).

Given there are a number of things that need to be set up, it's perfectly fine to provide instructions just for one or more of those -- you don't need to worry about not describing every single detail of the setup. Any improvement is worth it.

Note: It is rather probable that the same instructions on environment setup will apply to all three of the how-tos (or just with minor adjustments).

Reference

• Diataxis: Tutorial
• ReadTheDocs: Netplan documentation
• GitHub: netplan