ROUTE FLAPPING… YOU CAN SEE THIS WITH TRACERT




In computer networking and telecommunications, route flapping occurs when a router alternately advertises a destination network via one route then another (or as unavailable, and then available again) in quick sequence. A closely related term is interface flapping where an interface on a router has a hardware failure that will cause the router to announce it alternately as “up” and “down”.
Route flapping is caused by pathological conditions (hardware errors, software errors, configuration errors, intermittent errors in communications links, unreliable connections, etc.) within the network which cause certain reachability information to be repeatedly advertised and withdrawn.

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