Re: different behavior between two ns version

[Arnaud Legout <Arnaud.Legout@eurecom.fr>]

John Heidemann wrote:
> 
> On Fri, 28 Aug 1998 19:06:23 +0200, Arnaud Legout wrote:
> >hi,
> >when I run the attached script with the ns2.1b3 daily snapshot from may
> >25, 1998
> >everything is ok.
> >But when I run the same script with the *real* daily snapshot  I have
> >the following
> >message :
> >warning: classifier _o31 unknown flow s:0, d:256, fid:0, bucket:0
> >_o31: no target for slot -1
> >
> >have you an idea about that?
> 
> The default target of an agent was changed from 0 (the first created
> sink) to -1 (nowhere) in the last week.
> 
> I would guess that some source (probably attached to the node with
> classifier _o31) doesn't have its sink specified.  Use gen-map to dump
> the agents and which should be apparent.
> 
>    -John Heidemann


John,
when I use gen-map I have :

% $ns gen-map
Node _o10(id 0)
                classifier__o11(Classifier/Addr)
                address_0()
                dmux__o26(Classifier/Addr)

        Agents at node (possibly in order of creation):
                _o24    Agent/TCP               portID: 0(0)

        Link _o15, fromNode_ _o10(id 0) -> toNode_ _o12(id 1)
        Components (in order) head first
                _o30    ErrorModule
                _o14    Queue/DropTail
                _o16    DelayLink
                _o18    TTLChecker
---
Node _o12(id 1)
                classifier__o13(Classifier/Addr)
                address_1()
                dmux__o27(Classifier/Addr)

        Agents at node (possibly in order of creation):
                _o25    Agent/TCPSink           portID: 0(256)

        Link _o20, fromNode_ _o12(id 1) -> toNode_ _o10(id 0)
        Components (in order) head first
                _o19    Queue/DropTail
                _o21    DelayLink
                _o23    TTLChecker
---

I have no classifier _o31. So I don't know what to do. 
It seems to me that the problem comes from the loss module part but as 
I don't really understand how loss module work I am not able to find the 
problem (for instance I don't understand what is the meaning of the line
:
$em bind $errmodel 1
in my script).

Thanks for any help

Arnaud.

Here is my simple script :
------------------------------------------------------------------
set ns [new Simulator]

set n(1) [$ns node]
set n(2) [$ns node]
$ns duplex-link $n(1) $n(2) 8Mb 10ms DropTail

set tcp_source1 [new Agent/TCP]
set tcp_sink1 [new Agent/TCPSink]

$ns attach-agent $n(1) $tcp_source1
$ns attach-agent $n(2) $tcp_sink1
$ns connect $tcp_source1 $tcp_sink1

set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp_source1

set puit [new Agent/LossMonitor]
set lossylink [$ns link $n(1) $n(2)]
set em [new  ErrorModule Fid]
set errmodel [new ErrorModel/List]
$errmodel unit pkt
$errmodel droplist "1"

$errmodel drop-target $puit
$em bind $errmodel 1
$em insert $errmodel
$lossylink errormodule $em

$ns at 0 "$ftp1 start"
$ns at 10.0 "exit 0"

$ns run 
------------------------------------------------------------------
Here is the message I have when I run the script with ns (recent
snapshot):

warning: classifier _o31 unknown flow s:0, d:256, fid:0, bucket:0
_o31: no target for slot -1



--
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Arnaud Legout

Institut Eurecom               	Phone : 00.33.4.93.00.26.61
2229, route des Cretes         	Fax   : 00.33.4.93.00.26.27
BP 193                         	E-mail: Arnaud.Legout@eurecom.fr
06904 Sophia Antipolis cedex    Web   : http://www.eurecom.fr/~legout    
FRANCE                    
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