Hi, Please, I need to a script awk to calculate with ns2, Overhead packets in 2 minutes by increasing ART (3s, 12s, 30s, 60s, 120s) we note that: ACTIVE_ROUTE_TIMEOUT (ART). The ART is a static parameter that defines how long a route is kept in the routing table after the last transmission of a packet on the route. The best Lyx