A method for operating a flow control entity which is configured to control a data packet flow in a network in which at least one virtualized gateway and at least one other gateway exchange routing data, the method comprising: - receiving a message from a node located in an interconnection used by the at least one virtualized gateway and the at least one other gateway to exchange routing data by which one of the gateways informs the other of the gateways about new routes and withdrawn routes for data packet flows which traverse the at least one virtualized gateway and the at least one other gateway, - extracting the routing data from the received message, extracted information comprising at least information about the new routes and withdrawn routes traversing the at least one virtualized gateway or the at least one other gateway, - translating the extracted routing data into routing information used to control the data packet flows at the at least one virtualized gateway, - transmitting the routing information to an infrastructure managing entity configured to manage a virtualized infrastructure of the network, the method being characterized by the following steps: - receiving a request for a configuration of the node located in the interconnection used by the at least one virtualized gateway and the at least one other gateway to exchange the routing data, - determining a configuration of the node located in the interconnection such that the node is configured to identify the routing data between the at least one virtualized gateway and the at least one other gateway , - applying the configuration to the node located in the interconnection, wherein applying the configuration comprises configuring the node such that the node carries out the following steps: - checking whether the received message comprises the routing data informing the other gateway about changed routes of the data packet flows, - in the affirmative, transmitting a copy of the received message to the flow control entity. - receiving a message from a node located in an interconnection used by the at least one virtualized gateway and the at least one other gateway to exchange routing data by which one of the gateways informs the other of the gateways about new routes and withdrawn routes for data packet flows which traverse the at least one virtualized gateway and the at least one other gateway, - extracting the routing data from the received message, extracted information comprising at least information about the new routes and withdrawn routes traversing the at least one virtualized gateway or the at least one other gateway, - translating the extracted routing data into routing information used to control the data packet flows at the at least one virtualized gateway, - transmitting the routing information to an infrastructure managing entity configured to manage a virtualized infrastructure of the network, the method being characterized by the following steps: - receiving a request for a configuration of the node located in the interconnection used by the at least one virtualized gateway and the at least one other gateway to exchange the routing data, - determining a configuration of the node located in the interconnection such that the node is configured to identify the routing data between the at least one virtualized gateway and the at least one other gateway , - applying the configuration to the node located in the interconnection, wherein applying the configuration comprises configuring the node such that the node carries out the following steps: - checking whether the received message comprises the routing data informing the other gateway about changed routes of the data packet flows, - in the affirmative, transmitting a copy of the received message to the flow control entity. <EOS>