@classmethod
    def tearDownClass(cls):
        has_exception = False
        for vpnservice in cls.vpnservices:
            try:
                cls.client.delete_vpn_service(vpnservice['id'])
            except Exception as exc:
                LOG.exception(exc)
                has_exception = True

        for router in cls.routers:
            try:
                (cls.client.remove_router_interface_with_subnet_id(
                 router['id'], cls.subnets[0]['id']))
                cls.client.delete_router(router['id'])
            except Exception as exc:
                LOG.exception(exc)
                has_exception = True
.........................
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        for network in cls.networks:
            try:
                cls.client.delete_network(network['id'])
            except Exception as exc:
                LOG.exception(exc)
                has_exception = True
        super(BaseNetworkTest, cls).tearDownClass()
        if has_exception:
            raise TearDownException()