Introduction to Network Animator(NAM)

Introduction to Network Animator (nam) : Introduction to Network Animator (nam) V. Vasantha M.E., Senior Lecturer, Dept. Of Information Technology, National Engineering College, K. R. Nagar, Kovilpatti.

nam : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 2 nam Basic visualization Topology layout Animation control Synchronous replay Fine-tune layout TCP/SRM visualization Editor: generate ns simulation scripts

NAM window : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 3 NAM window

nsnam Interface : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 4 nsnam Interface Color Node manipulation Link manipulation Topology layout Protocol state Miscellaneous

nam Interface: Color : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 5 nam Interface: Color Color mapping $ns color 40 red $ns color 41 blue $ns color 42 chocolate Color  flow id association $tcp0 set fid_ 40 ;# red packets $tcp1 set fid_ 41 ;# blue packets

nam Interface: Nodes : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 6 nam Interface: Nodes Color $node color red Shape (can’t be changed after sim starts) $node shape box ;# circle, box, hexagon Marks (concentric “shapes”) $ns at 1.0 “$n0 add-mark m0 blue box” $ns at 2.0 “$n0 delete-mark m0” Label (single string) $ns at 1.1 “$n0 label \”web cache 0\””

nam Interfaces: Links : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 7 nam Interfaces: Links Color $ns duplex-link-op $n0 $n1 color "green" Label $ns duplex-link-op $n0 $n1 label "abced" Dynamics (automatically handled) $ns rtmodel Deterministic {2.0 0.9 0.1} $n0 $n1 Asymmetric links not allowed

nam Interface: Topo Layout : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 8 nam Interface: Topo Layout “Manual” layout: specify everything $ns duplex-link-op $n(0) $n(1) orient right $ns duplex-link-op $n(1) $n(2) orient right $ns duplex-link-op $n(2) $n(3) orient right $ns duplex-link-op $n(3) $n(4) orient 60deg If anything missing  automatic layout

nam Interface: Protocol State : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 9 nam Interface: Protocol State Monitor values of agent variables $ns add-agent-trace $srm0 srm_agent0 $ns monitor-agent-trace $srm0 $srm0 tracevar C1_ $srm0 tracevar C2_ # … … $ns delete-agent-trace $tcp1

nam Interface: Misc : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 10 nam Interface: Misc Annotation Add textual explaination to your sim $ns at 3.5 "$ns trace-annotate \“packet drop\"“ Set animation rate $ns at 0.0 "$ns set-animation-rate 0.1ms"

nam Interface: Misc – contd., : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 11 nam Interface: Misc – contd., $no label “label name” $n1 label “Receiver” $ns at 1.2 "$n2 join-group $rcvr $group2; \ $n2 add-mark m0 red" $ns at 1.25 "$n2 leave-group $rcvr $group2; \ $n2 delete-mark m0" $ns at 1.3 "$n2 join-group $rcvr \ $group2; \ $n2 add-mark m1 red" $ns at 1.35 "$n2 join-group $rcvr $group1; \ $n2 add-mark m2 blue"

Slide 12 : 2/14/2011 V. Vasantha, National Engineering College, Kovilpatti 12 Queries ??? Thank U !!!