Automatic Test Packet Generation (ATPG) comprehends router designs and produces a device autonomous model. The reproduction is utilized to deliver a base arrangement of test packets to negligibly put into impact each connection in the network or maximally practice each standard in the network. Test packets are post at normal interims, and notification failures trigger a gap instrument to limit the issue. ATPG can see both functional e.g., off base firewall tenet and execution issues e.g., congested queue. ATPG adjusts however past prior work in static goes checking which can't distinguish liveness or execution faults or fault confinement which just limits faults given liveness results.