[libvirt-users] how to restart the network connection of kvm guest OS ?

[Osier Yang]

ÓÚ 2011Äê03ÔÂ24ÈÕ 19:16, ºÎÎÄ´Ï Ð´µÀ:
> When a vm move from one VLAN(e.g. VLAN 1) to another VLAN (e.g. VLAN 2),
> it is needed to restart the network connection of guest OS, so that it
> can begin a dhcp discover and get a new ip again. But i can't find the
> way to restart the guest os's network connection by libvirt (neither
> python API nor virsh command). Is any other ways?

Hi,

Won't virt-manager (if has) in your guest try to restart the network?

> PS: i found that the VirtualBox can detach the cable of VMs and
> re-attach so that the guest OS will recognize and restart a dhcp
> discover when the cable re-attach. I guess the KVM will have some
> feature like that , is anybody know something about that?

Libvirt supports similar function.
# virsh detach-interface
# virsh attach-interface

Or
# virsh detach-device
# virsh attach-device

the difference between "*-device" and "*-interface" is the
accepted arguments, the later one accepts interface xml.

Regards
Osier