Hi, Two questions, hope any ns-users will help to answer. In QueueMonitor objects, what is the difference between the statitics collected for variable, e.g. the parrivals_ & pktsInt_? I assume they all collect the running sum of the # of packets received on a link. Which state variable track the # of packets in transit on a link? parrivals_ or pdepartures_? Tks, shuqian