[ns] Error using $ns rtproto LS

[Ajay Kumar Todimala]

Folks,

I am a newbie and trying to simulate LS link-state routing protocol on NS-2.
It works well with DV, distance-vector protocol.
I have attached the a fragment of the simulation script and the error
message below.

May be I am missing something simple.
Any help on how to debug/get it to work is Greatly Appreciated.


Thanks,
Ajay.


Here is the script fragment:

###############################################

*
*
*

#Set Queue Size of link (n2-n3) to 10
$ns queue-limit $n1 $n2 2

#Monitor the queue for link (n2-n3). (for NAM)
$ns duplex-link-op $n1 $n2 queuePos 0.5

#Simulate link failure
$ns rtmodel-at 0.2 down $n0 $n1
$ns rtmodel-at 1.9 up $n0 $n1


# now set up some events
$ns at 0.1 "$cbr start"
$ns at 2.0 "$cbr stop"

#Call the finish procedure after 3 seconds of simulation time
$ns at 3.0 "finish"

#Print CBR packet size and interval
puts "CBR packet size = [$cbr set packet_size_]"
puts "CBR interval = [$cbr set interval_]"

$ns rtproto LS

proc finish {} {
        global ns f nf
        $ns flush-trace
        close $f
        close $nf

        puts "running nam..."
        exec nam 4cycle.nam &
        exit 0
}

$ns run

###############################################


I get the following error.

ns: _o131 get-all-nodes:
    (_o131 cmd line 1)
    invoked from within
"_o131 cmd get-all-nodes"
    invoked from within
"catch "$self cmd $args" ret"
    invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..."
    (procedure "_o131" line 2)
    (SplitObject unknown line 2)
    invoked from within
"_o131 get-all-nodes"
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