def add_interface(self, name, address):
name = self.clean_iface_name(name)
if name in self.interfaces:
raise KeyError("%s already has an interface on %s" % (self, name))
logger.info("Adding interface %s with address=%s to %s", name, address, self)
is_active = self.is_active
nic = Nic(name)
nic.config.address = address
nic.config.save()
if is_active:
nic.ifup()
return True
