how to implement multiple queues in Ns-2

Question

In my project I want to differentiate the incoming traffic into multiple classes like critical, normal, delay sensitive packets,

want to queue each type of packet in separate queues having different priority,

I define highest priority in the order :

1. Critical packets,
2. delay sensitive packets
3. normal packets.

how i can do it in NS-2.

Answer 1

Use the Queue/dsRED queue from the diffserv model.

You can see example scripts in

$NS_HOME/tcl/ex/diffserv/