[ns] How to exclude the droped packet from trace file

[wajid]

Hi all,
        I want to exclude the droped packet from trace file because I used traffic source rate equal to channel rate i.e 11Mbps and it creates lot of droped packets which increase the trace file size, and i am running simulation for 1 to  40 stations and it has exceeded the size of the hard disk,
  Any suggestions ?
  thanks in advance
  wajid

 Send instant messages to your online friends http://uk.messenger.yahoo.com