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how to disable cc2430 router forward multiple same message packet of itself

Other Parts Discussed in Thread: CC2591, CC2430

i use cc2430+cc2591 ,zstack version zstack-1.4.3-1.2.1  

i have the same top appication level codes for endDevice and router.    i individually test  one endDevice+ one Coordinator  framework  and one Router+ one Coordinator framework ( the coordinator is the same module with the same codes)  in order to compare returne message numbers.  when i send one message packet  from the coordinator to  endDevice to Request one message, the endDevice return one message packet as expect, but when i do the same to Router, the Router return 4 same packets to coordinator.  

i guess the router forward the sendout message of itseft 3 times,  but i don't want this, i expect the route don't forward the message send from itself , and forward only once the message send from other modules,  how should i do?