Package: inet.linklayer.ieee8021d.relay

Ieee8021dRelay

simple module

This modul forwards frames (EtherFrame) based on their destination MAC addresses to appropriate ports.

It can work in two mode:

STP unaware mode (If no module connected to its STP gate): Looks up the frames destination address in the MACAddressTable, if it found the address, sends through that port, or otherwise broadcasts it.
STP aware mode (If an STP or RSTP module connected to its STP gate): Handles BPDU frames. If relaying a message also checks the port's status in the InterfaceTable.

See also: EtherFrame, MacAddressTable, Stp, Rstp

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Parameters

Name	Type	Default value	Description
interfaceTableModule	string	"^.interfaceTable"	The path to the InterfaceTable module
macTableModule	string	"^.macTable"	The path to the MacAddressTable module
hasStp	bool

Properties

Name	Value	Description
display	i=block/broadcast;bgb=425,114

Gates

Name	Direction	Size	Description
ifIn	input
ifOut	output
upperLayerIn	input
upperLayerOut	output

Signals

Name	Type	Unit
packetReceivedFromLower	cPacket
packetReceivedFromUpper	cPacket
packetSentToLower	cPacket

Source code

//
// This modul forwards frames (~EtherFrame) based on their destination MAC addresses to appropriate ports.
//
// It can work in two mode:
// - STP unaware mode (If no module connected to its STP gate):
//     Looks up the frames destination address in the ~MACAddressTable, if it found the address, sends through
//	   that port, or otherwise broadcasts it.
// - STP aware mode (If an ~STP or ~RSTP module connected to its STP gate):
//     Handles BPDU frames.
//     If relaying a message also checks the port's status in the InterfaceTable.
//
// @see EtherFrame, MacAddressTable, Stp, Rstp
//
simple Ieee8021dRelay like IMacRelayUnit
{
    parameters:
        @display("i=block/broadcast;bgb=425,114");
        string interfaceTableModule = default("^.interfaceTable"); // The path to the InterfaceTable module
        string macTableModule = default("^.macTable");             // The path to the MacAddressTable module
        @signal[packetSentToLower](type=cPacket);
        @signal[packetReceivedFromLower](type=cPacket);
        @signal[packetReceivedFromUpper](type=cPacket);

        bool hasStp;

    gates:
        input ifIn;
        output ifOut;
        input upperLayerIn;
        output upperLayerOut;
}

File: src/inet/linklayer/ieee8021d/relay/Ieee8021dRelay.ned