Figure 5

Flow selection and route recovery in case of degradation. (a) Initially, flows f1 and f2 are being routed through a link which becomes degraded. (b) If the degradation is due to congestion and f2 is selected for being re-routed, the new route might reproduce the same problem. (c) As per the algorithm shown in Equation (6), f1 is selected for being re-routed, which leads to a better flow distribution in the network, whereby flows affect each other to a significantly smaller extent.