KVM : create private virtual switches

# kvm --version QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c) 2003-2008 Fabrice Bellard # tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"

make an xml file

# cat private0.xml <network>  <name>private0</name>  <bridge name="privatebr0" /> </network>

define the private0

# virsh Welcome to virsh, the virtualization interactive terminal. Type:  'help' for help with commands       'quit' to quit virsh # net-define /etc/libvirt/qemu/networks/private0.xml Network private0 defined from /etc/libvirt/qemu/networks/private0.xml

to use private0 , you need to start it.

virsh # net-list --all Name                 State      Autostart ----------------------------------------- default              active     yes private0             inactive   no

start private0

virsh # net-start private0 Network private0 started virsh # net-list --all Name                 State      Autostart ----------------------------------------- default              active     yes private0             active     no

[ start private0 automatically when booting a KVM host ]

virsh # net-autostart private0 Network private0 marked as autostarted virsh # virsh # net-list --all Name                 State      Autostart ----------------------------------------- default              active     yes private0             active     yes

symbolic files will be created under /etc/libvirt/qemu/networks/autostart directory.

# ls -l /etc/libvirt/qemu/networks/autostart/ total 0 lrwxrwxrwx default.xml -> /etc/libvirt/qemu/networks/default.xml lrwxrwxrwx private0.xml -> /etc/libvirt/qemu/networks/private0.xml