87 // Explicitly create the channels required by the topology (shown above).

    87 // Explicitly create the channels required by the topology (shown above).

    88 //

    88 //

    89   CsmaHelper csma;

    89   CsmaHelper csma;

    90   csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));

    90   csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));

    91   csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));

    91   csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));

    93   NetDeviceContainer d = csma.Install (n);

    93   NetDeviceContainer d = csma.Install (n);

    94 

    94 

    95   Ipv4AddressHelper ipv4;

    95   Ipv4AddressHelper ipv4;

    96 //

    96 //

    97 // We've got the "hardware" in place.  Now we need to add IP addresses.

    97 // We've got the "hardware" in place.  Now we need to add IP addresses.