MrpRelay¶
Package: inet.linklayer.mrp
simple module MrpRelay
Relay unit with support for the Media Redundancy Protocol (MRP), defined in IEC 62439-2.
This module forwards Ethernet frames based on their destination MAC addresses to appropriate ports. It handles frame forwarding in accordance with interface data from both STP and MRP, and blocks traffic if ports are set to BLOCKED. If a frame specific to STP or MRP is received, this frame is processed according to the rules in MrpMacForwardingTable, and then forwarded to the appropriate upper layer MRP or STP instance.
See also: MrpMacForwardingTable, Mrp, MrpInterconnection
Usage diagram¶
Inheritance diagram¶
Used in compound modules¶
Name |
Type |
Description |
|---|---|---|
compound module |
EthernetSwitch models a Layer 2 Ethernet switch with support for various IEEE 802.1 protocols and features. It provides frame forwarding based on MAC addresses and implements multiple switching technologies. |
Extends¶
Name |
Type |
Description |
|---|---|---|
simple module |
Forwards frames (~EtherFrame) based on their destination MAC addresses to appropriate ports. |
Parameters¶
Name |
Type |
Default value |
Description |
|---|---|---|---|
displayStringTextFormat |
string |
“proc: %p\ndisc: %d” |
Determines the text that is written on top of the submodule, supports displaying pars, watches, and module-specific information |
macTableModule |
string |
||
interfaceTableModule |
string |
||
switchingDelay |
double |
truncnormal(8.61us,5.42us) |
Switches take a certain amount of time for processing each packet. This parameter sets the processsing delay applied before sending packets out. |
Properties¶
Name |
Value |
Description |
|---|---|---|
class |
MrpRelay |
|
display |
i=block/switch |
Gates¶
Name |
Direction |
Size |
Description |
|---|---|---|---|
lowerLayerIn |
input |
||
lowerLayerOut |
output |
||
upperLayerIn |
input |
||
upperLayerOut |
output |
Signals¶
Name |
Type |
Unit |
Description |
|---|---|---|---|
packetDropped |
|||
packetReceivedFromLower |
|||
packetReceivedFromUpper |
|||
packetSentToLower |
Statistics¶
Name |
Title |
Source |
Record |
Unit |
Interpolation Mode |
Description |
|---|---|---|---|---|---|---|
packetDropped |
packets dropped |
count,sum(packetBytes),vector(packetBytes) |
none |
Source code¶
//
// Relay unit with support for the Media Redundancy Protocol (MRP), defined
// in IEC 62439-2.
//
// This module forwards Ethernet frames based on their destination MAC addresses
// to appropriate ports. It handles frame forwarding in accordance with
// interface data from both STP and MRP, and blocks traffic if ports are set to
// BLOCKED. If a frame specific to STP or MRP is received, this frame is
// processed according to the rules in ~MrpMacForwardingTable, and then
// forwarded to the appropriate upper layer MRP or STP instance.
//
// @see ~MrpMacForwardingTable, ~Mrp, ~MrpInterconnection
//
simple MrpRelay extends Ieee8021dRelay like IMacRelayUnit
{
parameters:
@class(MrpRelay);
// Switches take a certain amount of time for processing each packet.
// This parameter sets the processsing delay applied before sending
// packets out.
volatile double switchingDelay @unit(s) = default(truncnormal(8.61us,5.42us));
}