def METHOD_NAME(self):
    manager = self.create_peer()
    connections = manager.connections
    sysctl = ConnectionsManagerSysctl(connections)
    sysctl.set('sync_update_interval', 10)
    self.assertEqual(connections.lc_sync_update_interval, 10)
    self.assertEqual(sysctl.get('sync_update_interval'), 10)
    with self.assertRaises(SysctlException):
        sysctl.set('sync_update_interval', -1)