There are many ways. Details depend on your requirements.There is a way to create a bulk of VM`s?
Depends on how you assign the IP, if its static - best to use CloudInit. You can also utilize qemu agent and a few other ways.Also, is a to change their IP`s via cli? like in VirtualBox using the vbmanager?
See https://pve.proxmox.com/pve-docs/qm.1.html (qm guest cmd) - you'll need to get creative if thats your chosen route. Perhaps upload new config file, edit via shell exec, etc. Again - depending on your circumstances (OS, boot level, etc) there are many different ways.How I using cli to configure network via qemu agent? this is more important to me.
There is no single user-friendly command to do what you want via agent, because thats not the purpose that agent is normally used for.i didnt see any network config
did you familiar with that?