Linux Containers (LXC) are an operating system type of virtualization. This operating system type of virtualization uses the Linux facilities of cgroups and namespaces. This allows virtualization of items like CPUs, memory, block I/O, networks, etc.
Be aware that many details have been omitted and would be required to make this a functioning example.
Several command line utilities are available to manage the LXC containers:
There are alternatives for network configuration, not just libvirt. The alternatives in the configuration of the network usually center around the selection of hypervisor. Network configuration for Virtual Machines and LXC containers can be created with: