[ns] Problem: setting buffer size to Zero.

["David ELIE-DIT-COSAQUE" <david.elie-dit-cosaque@usa.alcatel.com>]

Hi to all,

I am beginning with NS and I have problems to set the maximum buffer size parameter of the Queues to zero.

I used 2 differents methods:

 

The first one:

 

#Maximum buffer size

$ns queue-limit $n0 $n3 0

$ns queue-limit $n1 $n3 0

$ns queue-limit $n2 $n3 0

$ns queue-limit $n3 $n4 0

 

 

or The second one:

 

#Maximum buffer size

set q [[$ns link $n0 $n3] queue]
$q set limit_ 0
set q [[$ns link $n1 $n3] queue]
$q set limit_ 0
set q [[$ns link $n2 $n3] queue]
$q set limit_ 0
set q [[$ns link $n3 $n4] queue]
$q set limit_ 0

Even after this, I can see with "Nam" some buffering capabilities. I use the following command to view the queue of link 3->4 for example:

 

$ns duplex-link-op $n3 $n4 queuePos 0.5

 

Perhaps it is just a visualization problem?

Thanks in advance for your help,

David.