Abstract: A method in a source node establishing independent network paths including a first and second router nodes connected to the source node over a first and second mutually independent networks. The source node includes a first interface towards the first network, associated with a path identifier for a first network path; a second interface towards a second network associated with a path identifier for a second network path, and is configured to select which of the first and second router nodes should be used for sending data from the source node to the destination node via the first and second network paths, wherein the source node is configured to select different router nodes for the first and second network paths.

Abstract: A method in a source node establishing independent network paths including a first and second router nodes connected to the source node over a first and second mutually independent networks. The source node includes a first interface towards the first network, associated with a path identifier for a first network path; a second interface towards a second network associated with a path identifier for a second network path, and is configured to select which of the first and second router nodes should be used for sending data from the source node to the destination node via the first and second network paths, wherein the source node is configured to select different router nodes for the first and second network paths.

Abstract: A method and device for handling data transmissions in a redundant data network comprising a first network and a second network and a transmission protocol, further comprising a plurality of nodes, of which at least two nodes are each connected to a first network and a second network. The method comprises the steps of sending a first message via a first network and resending the first message when the timeout for receipt of an acknowledgement signal expires. When a timeout expires, the message is resent via the second network by substituting a second route-specific address using the second network in place of said first network. In the preferred embodiment of the invention the transmission protocol TCP/IP is used as the transmission protocol. The advantage is that the method does not increase network traffic and the timeout period may be selected to suit the traffic conditions of particular data networks.