The invention relates to distribution of IP traffic between more than one route between a node and an IP network. The invention is concerned with a new method for distribution of connections between a plurality of possible routes for transmission of IP packet traffic between a source node and end nodes, each of the routes being associated with a plurality of IP addresse. According to the invention, a route is selected for a new connection to be established between the source node and an end node for transmission of packet traffic, the selected route is taken into use by translating source IP addresses of packets transmitted from the source node to said end node to an IP address associated with the selected route, and said selection of a route is performed on the basis of predefined criteria. Preferably, the selection of the route is performed on the basis of round trip times measured by a new method using packet replication.
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