You should install and test yourself. The code is here.
To run the executable, type
java LossyRouter [portno] [droprate]
where portno is the port of the lossy router,
and droprate is the probability (value between 0 and 1) that the packet is dropped
when the Flag field in the packet is set to any other value than 0 or 1.
This information is also available in the following documentation