1. A computer implemented method for network fault isolation, the computer implemented method comprising: responsive to receiving a request for the network fault isolation between a sender and a receiver, performing a plurality of real-time path traces between the sender and the receiver to form a plurality of trace paths; determining whether an asymmetry is present between the sender and the receiver from the plurality of trace paths; identifying a set of routers with each trace path in the plurality of trace paths to form a plurality of identified routers; and identifying each event stored for the plurality of identified routers to form a set of identified events.