Flapping is the continual changing of a network connection path that results from an intermittent circuit connection that indcates to the current connection path ( the routers) into thinking there is a loss in connection or that a better connection exist. Route Flapping is the continual change of a network connection path that results from intermittent congestion or loss of circuit connection that indicates to the current router connection path that there is a loss in connection or that a better connection path exist. This causes the packet routing path to continually change and can result in significant variance in transmission delay times. Route Flapping is over come by newer IPV6 protocols and Reservation protocols.
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This is CABL.com posting #300653. Tiny Link: cabl.co/mbqnp