Hi, I encounter the following problem in the ns2 when I was using mcast DM mode: The state (OIF and IIF) assignment at each node expire very fast (about 0.5 sec). I've heard that I can change that time by setting the variable "DM set PruneTimeout 200.0". But it doesn't help. Can you please help me? Sincerely, Alexei P.S. I am sorry if I post the message in a wrong way...