AODV routing protocol ans shadowing propagation model

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http://www.linuxquestions.org – hi, when I simulate AODV protocol with the shadowing propagation model under ns-allinone-2.33, I am faced to a double reception of the same packet when I check the trace file? (ie, packet is received more than once) This problem doesn't exist with the tworayground propagation model. PS: my topology run just with a source and destination, no more nodes. any suggestions plz (HowTos)