Connecting Multiple Active Sources to a Passive Sink¶

The PacketMultiplexer module connects to multiple active packet sources on its inputs, and pushes all incoming packets onto a passive packet sink on its single output.

In this example network, packets are produced at random intervals by several active packet sources (ActivePacketSource). The packets are consumed by a single passive packet sink (PassivePacketSink) upon arrival. The single sink is connected to multiple sources using an intermediary component (PacketMultiplexer) which simply forwards packets.

network MultiplexerTutorialStep
{
    parameters:
        int numProducers;
    submodules:
        producer[numProducers]: ActivePacketSource {
            @display("p=100,100,c,100");
        }
        multiplexer: PacketMultiplexer {
            @display("p=300,100");
        }
        consumer: PassivePacketSink {
            @display("p=500,100");
        }
    connections allowunconnected:
        for i=0..numProducers-1 {
            producer[i].out --> multiplexer.in++;
        }
        multiplexer.out --> consumer.in;
}

[Config Multiplexer]
network = MultiplexerTutorialStep
sim-time-limit = 10s

*.numProducers = 3
*.producer[*].packetLength = 1B
*.producer[*].productionInterval = uniform(0s, 2s)