I configure a 3600 router with eigrp and default route to connect another 3600 router with the PVC and a internet circuit.at the normal circumstance,the best route choice is going through PVC by running eigrp,but sometime traffic will transfer to the internet upstream when the PVC circuit encounter problems.after the PVC is restored,the traffic still passing through from the internet upstream,I wonder why the traffic have no jump back to PVC,every time I have to manully change the configuration in my local cisco3600 router,first NO NETWORK ***** IN ROUTER EIGRP 333,then NETWORK ****,this traffic will be transfer to the PVC