[ns] How to use queue-monitor?

[Padmaparna Haldar]

Look into test-suites that use queue monitoring under tcl/test.
Also from yr error below it seems the link object between node 0 and node 
1 doesn't exist. did you create the link before calling monitor-queue 
function.

--PAdma
 On Thu, 26 Feb 2004, Jingyan Zhu wrote:


> 
> Dear all,
> 
> >From ns manual, it seems ns supports traces and monitors. However, it 
> doesn't show how a monitors can be used clearly, apart from commond: $ns_ 
> monitor-queue n1 n2 qtrace optional:sampleinterval .
> 
> When runing a 2-node wireless simulation, I added this commond  after 
> starting an ftp traffic. And then error turns up saying
> 
> "can't read "link_(0:1)": no such variable while executing "$link_([$n1 id]: 
> [$n2 id]) init-monitor $self $qtrace $sampleInterval"
>       (procedure "_03" line 3)
>       (Simulator monitor-queue line 3)
>       invoked from within
> "$ns monitor-queue $node_(0) $node_(1) $qtrace"
>       (file "two-nodes.tcl" line 108)
> 
> Can anyone give me a hint how to solve this problem? I'd like to use 
> monitors to count packets transmitted and received, and got stuck here :( 
> Thanks a lot.
> 
> Yours,
> Jingyan
> 
> _________________________________________________________________
> Stay in touch with absent friends - get MSN Messenger 
> http://www.msn.co.uk/messenger
> 

-- 
------------------------------------------------ 
Be true to your work, your word, and your friend. 
--Thoreau

Padmaparna Haldar