An Ethernet hub model.

The model simply broadcasts frames (and transmission updates representing aborted frames, etc.) received on one port on all other ports, mimicking the propagation of electrical signals.

Note that no special attention is made to appropriately model frame truncations that occur when the link breaks, or comes back up while a transmission is underway. If you need to precisely model what happens when the link state changes, you cannot use this module.

Properties

Name	Value	Description
networkNode
class	::inet::physicallayer::WireJunction
labels	node
display	i=device/hub;bgb=155,104

Gates

Name	Direction	Size	Description
ethg [ ]	inout

Signals

Name	Type	Unit
packetReceived	cMessage

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
packetReceived	packets	packetReceived	count, sum(packetBytes), vector(packetBytes)		none

Called methods (observed)

function	info	call from
inet::physicallayer::WireJunction::receiveSignal	POST_MODEL_CHANGE	-=Network=-, ScenarioManager

Incoming messages (observed)

gate	msg	kind	ctrl	srcModule	tags
ethg$i[]	EthernetFilledIfgSignal	0		EthernetCsmaMac
ethg$i[]	EthernetJamSignal	0		EthernetCsmaMac
ethg$i[]	EthernetJamSignal	0		WireJunction
ethg$i[]	EthernetSignal	0		EthernetCsmaMac
ethg$i[]	EthernetSignal	0		WireJunction

Outgoing messages (observed)

gate	msg	kind	ctrl	destModule	tags
ethg$o[]	EthernetFilledIfgSignal	0		EthernetCsmaMac
ethg$o[]	EthernetJamSignal	0		EthernetCsmaMac
ethg$o[]	EthernetJamSignal	0		WireJunction
ethg$o[]	EthernetSignal	0		EthernetCsmaMac
ethg$o[]	EthernetSignal	0		WireJunction

Source code

//
// An Ethernet hub model.
//
// The model simply broadcasts frames (and transmission updates
// representing aborted frames, etc.) received on one port on all
// other ports, mimicking the propagation of electrical signals.
//
// Note that no special attention is made to appropriately model
// frame truncations that occur when the link breaks, or comes
// back up while a transmission is underway. If you need
// to precisely model what happens when the link state changes,
// you cannot use this module.
//
simple EthernetHub
{
    parameters:
        @networkNode();
        @class(::inet::physicallayer::WireJunction);
        @labels(node,ethernet-node);
        @display("i=device/hub;bgb=155,104");
        @signal[packetReceived](type=cMessage);
        @statistic[packetReceived](title="packets"; source=packetReceived; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
    gates:
        inout ethg[] @labels(EtherFrame-conn);
}

File: src/inet/node/ethernet/EthernetHub.ned

---

This documentation is released under the Creative Commons license