Instance launched on proxmox host is losing network connectivity

### problem

The instance launched on proxmox host is losing network connectivity

### versions

ACS 4.21

### The steps to reproduce the bug

Steps to reproduce the issue

1. Launch a vm in proxmox via cloudstack extension
2. The vm gets a ip from cloudstack vrouter
3. Stop the vm
4. Vr goes into shutdown in Cloudstack
5. Start the vm frm clodustack
6. The virtual router starts but vm doesn't get a IP address assigned

### What to do about it?

The vm should get a ip address assigned when the vr is rebooted

Start by reproducing the reported lifecycle in the Proxmox CloudStack extension: launch a VM, stop it, let the virtual router shut down, and start the VM again from CloudStack. Confirm that the virtual router restarts but the VM receives no IP address; done means the VM receives an IP after the router reboot.

Written by the indexing model from the issue text.