Dynamic configuration of routing paths in a data network

A system for selecting routing paths of data packets in a data network comprising a plurality of communication links and routing apparatuses, wherein the routing paths each include at least one communication link, the system comprising:

• a measure collector configured to collect measures indicative of at least one performance parameter indicating a performance of previous transmissions of data packets from origin end points that generate the data packets to destination end points that are destinations for the packets;
• a communication link costs calculator configured to use the collected measures for calculating the communication link costs and for assigning the calculated link costs to the communication links;
• and
• a network controller being configured to:
• use the calculated communication link costs to calculate, for at least two different routing paths in the data network, respective routing path overall costs, wherein the overall cost of a routing path depends on the communication link costs assigned to the communication links making up such routing path,
• select, among the at least two different routing paths, the routing path having the lower routing path overall cost, and
• cause a new data packet to be routed in the data network over the selected routing path,
• wherein the communication link costs calculator is configured to calculate and assign to the communication links respective communication link costs by:
• comparing the measures indicative of at least one performance parameter with at least one respective performance parameter threshold value;
• in case, for a previous transmission of data packets, the at least one performance parameter threshold value is trespassed, flagging the previous transmission of data packets;
• counting numbers of flagged previous transmission of data packets routed through same communication links;
• and
• assigning to the communication links respective communication link costs based on the respective counts of the numbers of flaaged previous transmission of data packets routed through same communication links.