hi for writing routing protocols go through the existing routing protocols , the .h and the .cc files and there will be an ex scricpt in tcl\ex run them get a feel of it find out how boroadcast is done. also go throuch the tcl inteface of these protocols. -- naveen III sem M.Tech NITK-surathkal ----------------------------------------- This email was sent from NITK Surathkal "Webmail " http://krec.ac.in/