Hello, Could you please tell me which file/code in ns is responsible for processing a cbr packet, and discard it (after writing any traces) as it has reached its destination and does not need to be forwarded again? The code which calls on the cmu-trace for the "agent" tracing of the reception of the packet seems to be the final task before the packet is forwarded (sent to the routing agent) or discarded if it has reached its destination, but I could not locate where this code actually is. Could anyone please guide me? Thanks. Ma Send instant messages to your online friends http://au.messenger.yahoo.com