Hello, If anyone is familiar with the TCP Reno code, I was wondering why the function dupack_action() does not perform a fast retransmit when bug_fix_=1 and ecn_=0... it seems like this forces the use of ecn_ (Explicit Congestion Notification) which may not be desirable for all simulations... Is the alternative to run the simulation with bug_fix_ = 0? Thanks for any help, Chris