Hi everyone,
I am a undergraduate research student at the University of Waterloo, Ontario and am a complete beginner to NS2 (and even Linux). I'm working for a research group and my task is to demonstrate a very basic emulation example by next week just to show that it is possible to use ns2 to emulate. I've been trying to get any simple emulation script to work for the past few weeks but have failed. I'm sure it would take an expert just a few minutes to write a couple lines of code to do this. Most explainations I have read to similar problems are even too advanced for my understanding either in terms of NS2 or Linux. If someone could please help me on a student level that would be greatly appreciated. I am using a Linux machine and so far I have downloaded and installed the allinone ns-2.29. I have also googled for some simple example emulation scripts. For example, I found this one: # Create simulator set ns [new Simulator] $ns use-scheduler RealTime # Emulator address set me [exec hostname] # Packet input set bpf0 [new Network/Pcap/Live] $bpf0 set promisc_ true set nd0 [$bpf0 open readonly fxp0] set filt "(not ip host $me)" $bpf0 filter $filt # Packet output set ipnet [new Network/IP] $ipnet open writeonly # Input agent set pfa [new Agent/Tap] $pfa network $bpf0 # Output agent set ipa [new Agent/Tap] $ipa network $ipnet # ICMP ECHO agent set echoagent [new Agent/PingResponder] set n0 [$ns node] set n1 [$ns node] set n2 [$ns node] $ns simplex-link $n0 $n2 100Mb 1000ms DropTail $ns simplex-link $n2 $n1 100Mb 1000ms DropTail $ns attach-agent $n0 $pfa $ns attach-agent $n1 $ipa $ns attach-agent $n2 $echoagent $ns simplex-connect $pfa $echoagent $ns simplex-connect $ipa $echoagent # Wait for ping to come in... $ns run When I try running this script I get a message that says: invalid command name "Network/Pcap/Live" while executing "Network/Pcap/Live create o_11 " invoked from within "catch "$className create $o $args" msg" (procedure "new" line 3) invoked within "new Network/Pcap/Live" invoked from within "set bpf0 [new Network/Pcap/Live]" (file "./vince/emu1.tcl" line 12) Can anyone help me with this problem please? Since I am not yet an ns2 expert, I don't know all too well how that code works. I believe it is a ping responder. All I need is a very simple emulation example to show that it works so any other suggestions or example scripts would be great! Thanks, Vincent Ngo -- View this message in context: http://www.nabble.com/ns2-emulation---urgent-help-needed-tf2092368.html#a5767814 Sent from the ns-users forum at Nabble.com.
