Various tool:
ifconfig ( and a file # if configuration )
brctl ( bridge-utils package) create bridge, it will be attach to a "host interface" and will have an IP@, tipical usage: mgt bridge or second interface/back up link
>>> New command: ip link add name br0 type bridge
virsh ( libvirt ) create virtual network, internal vbridge, only between VM.
...
ip addr ... ( replacing ifconfig ) configure l2 and l3 parameters
CLI NetworkManager:
[root@hp8300 me]# nmcli devicedevice [root@hp8300 me]# nmcli connection
...
main directory: /etc/libvirt/qemu/networks/
virsh net-define virbr1.xml virsh net-start virbr1virsh net-autostart virbr1
...