How to find Successor and Feasible Successor in EIGRP?

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Successor is best path in EIGRP whereas Feasible Successor is backup path.Successor is calculated on the basis of metric.Path with lowest computed distance(FD) is called successor.We also have a feasibility condition for a path to be feasible successor.Let us take a topology:-

To understand this one must be familiar how FD(Feasible Distance),RD(Reported distance)  are calculated.

 

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