Re: [ns] CBR Agent usage versus CBR traffic

[abadrah@tachys.com]

In fact L. Wood gave the response yesterday and said that I ehould use UBP
agent if I want to use the Application/Traffic/CBR.
Anyway the source code (ex1.tcl.gzip and ex2.tcl.gzip) are attached. 

My problem now is the make the network blocking. ie when the queue between
$n2 and n3 reatchs a limit $L (10 packets for instance) the generators n0
and n1 should keep their paquets until a free place will be available on
the target queue. So A notwork with NO LOSS OF PACKET bu with BLOCKING OF
PACKETs. This important in the multiprocessors area where datas are blocken
and not lossed like in the ATM or world.
Thanks by advance if you have any example about blocking network and the
use of RESUME(), WAIT(), BLOCK() or UNBLOCK()  methodes.
Ahmad.

Debojyoti Dutta �crit:

> Can you give us the entire script ...It seems your code has some reset etc
> 
> Debo
> 
> On Mon, 14 May 2001 abadrah@tachys.com wrote:
> 
> > 
> > Hi,
> > 
> > My question concerns the use of Agent/CBR versus Application/Traffic/CBR
> > 
> > When I use the bellow source code (Ex1 ) I have the following message :
> > "using backward compatible Agent/CBR; use Application/Traffic/CBR instead "
> > 
> > ################# Ex1 source code ######################
> > 
> > set cbr0 [new Agent/CBR]
> > $ns attach-agent $n0 $cbr0
> > $cbr0 set packetSize_ 500
> > $cbr0 set interval_ 0.01
> > 
> > #Create a Null agent (a traffic sink) and attach it to node n3
> > set null0 [new Agent/Null]
> > $ns attach-agent $n3 $null0
> > 
> > #Connect the traffic sources with the traffic sink
> > $ns connect $cbr0 $null0  
> > ################# End Ex1 source code ######################
> > 
> > But if I use the adviced "Application/Traffic/CBR" as in Ex2 source code I
> > have the following error message and nothing start after this  : 
> > 
> >     (_o82 cmd line 1)
> >     invoked from within
> > "_o82 cmd reset"
> >     invoked from within
> > "catch "$self cmd $args" ret"
> >     (procedure "_o82" line 2)
> >     (SplitObject unknown line 2)
> >     invoked from within
> > "$a reset"
> >     (procedure "_o10" line 4)
> >     (Node reset line 4)
> >     invoked from within
> > "$Node_($nn) reset"
> >     (procedure "_o3" line 10)
> >     (Simulator run line 10)
> >     invoked from within
> > "$ns run"
> >     (file "aa.tcl" line 127)
> > 
> > 
> > ################# Ex2 source code ######################
> > 
> > set cbr0 [new Application/Traffic/CBR]
> > $ns attach-agent $n0 $cbr0
> > $cbr0 set packetSize_ 500
> > $cbr0 set interval_ 0.01
> > 
> > #Create a Null agent (a traffic sink) and attach it to node n3
> > set null0 [new Agent/Null]
> > $ns attach-agent $n3 $null0
> > 
> > #Connect the traffic sources with the traffic sink
> > $ns connect $cbr0 $null0  
> > ################# End Ex2 source code ######################
> > 
> > How can I avoid the warning message and use the Application/Traffic/CBR ?
> > Am I obliged to use an Udp agent in order to use the
> > Application/Traffic/CBR  ? 
> > 
> > Thanks.
> > 
> > 
> > 
> > --------------------------------
> > Ahmad BADRAH
> > 
> > Performance Modeling Architect
> > e-mail : Ahmad.Badrah@tachys.com
> > phone  : +33 (0)4 92 94 48 18
> > Tachys Technologies
> > Les Algorithmes, ABS BP 29
> > 06901 Sophia-Antipolis Cedex
> > 
> > http://www.tachys.com
> > 
> > 
> > 
> 


Ahmad BADRAH

Performance Modeling Architect
e-mail : Ahmad.Badrah@tachys.com
phone  : +33 (0)4 92 94 48 18
Tachys Technologies
Les Algorithmes, ABS BP 29
06901 Sophia-Antipolis Cedex

http://www.tachys.com

ex1.tcl.gz

ex2.tcl.gz