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<main>
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<h1 id="introduction"><a class="header" href="#introduction">Introduction</a></h1>
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<p>Eden-sim is a ns-3 simulation library for embedded TSN networks.</p>
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<p>This book is a user guide designed to assist in the creation of simulation scripts using Eden-sim. It is organised as follows:</p>
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<ul>
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<li>Getting started part to introduce the fundamental ideas of Eden-sim</li>
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<li>Advanced uses part for complex projects</li>
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</ul>
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<p>Please note that in addition to the examples presented in this guide, example simulation scripts are also available in the following folders:</p>
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<ul>
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<li>contrib/ethernet/examples</li>
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<li>contrib/real-device/examples</li>
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<li>contrib/trace/examples</li>
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<li>contrib/traffic-generator/examples</li>
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<li>contrib/tsn/examples</li>
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</ul>
|
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<div style="break-before: page; page-break-before: always;"></div>
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<h1 id="prerequisites"><a class="header" href="#prerequisites">Prerequisites</a></h1>
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<p>To put this guide into practice, you only need to have ns-3 and Eden-sim installed. The installation procedure for these two tools is described in Eden-sim’s README.md.</p>
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<div style="break-before: page; page-break-before: always;"></div>
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<h1 id="creation-of-a-simple-ethernet-network"><a class="header" href="#creation-of-a-simple-ethernet-network">Creation of a simple ethernet network</a></h1>
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<h2 id="introduction-1"><a class="header" href="#introduction-1">Introduction</a></h2>
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|||
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<p>To perform a simulation with ns-3, you need to write a C++ program that describes the simulation to be performed. In this chapter, we will create such a simulation script able to simulate an Ethernet network composed of one switch to which three end stations are connected.</p>
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<h2 id="first-simulation-script"><a class="header" href="#first-simulation-script">First simulation script</a></h2>
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<p>Let’s start by creating a script that runs a 10-second simulation. To do this, create a file called chapter1.cc in the scratch folder located in the ns-3 folder. In this file, copy the following lines:</p>
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<pre><code class="language-c++">#include "ns3/simulator.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("Chapter 1");
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int
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main(int argc, char* argv[])
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{
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//Enable logging
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LogComponentEnable("Chapter 1", LOG_LEVEL_INFO);
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//Execute the simulation
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NS_LOG_INFO("Start of the simulation");
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Simulator::Stop(Seconds(10));
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Simulator::Run();
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Simulator::Destroy();
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NS_LOG_INFO("End of the simulation");
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return 0;
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}
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</code></pre>
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<p>To run it, simply execute the following command from the folder where ns-3 is installed.</p>
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<pre><code class="language-console">./ns3 run scratch/chapter1.cc
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</code></pre>
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<p>Congratulations, you have run your first simulation with ns-3! However, this simulation does not simulate anything.</p>
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<h2 id="topology-description"><a class="header" href="#topology-description">Topology description</a></h2>
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<p>Before simulating our Ethernet network, we must first describe it. To do this, let’s start by adding the necessary dependencies.</p>
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<pre><code class="language-c++">#include "ns3/simulator.h"
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#include "ns3/core-module.h"
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#include "ns3/node.h"
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#include "ns3/drop-tail-queue.h"
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|||
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|||
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#include "ns3/ethernet-net-device.h"
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#include "ns3/ethernet-channel.h"
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#include "ns3/switch-net-device.h"
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[...]
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|||
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</code></pre>
|
|||
|
|
<p>Next, the topology is described as follows:</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Enable logging
|
|||
|
|
LogComponentEnable("Chapter 1", LOG_LEVEL_INFO);
|
|||
|
|
|
|||
|
|
//Create four nodes
|
|||
|
|
Ptr<Node> n0 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES1", n0);
|
|||
|
|
Ptr<Node> n1 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES2", n1);
|
|||
|
|
Ptr<Node> n2 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES3", n2);
|
|||
|
|
Ptr<Node> n3 = CreateObject<Node>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<EthernetNetDevice> net0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<EthernetNetDevice> net1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<EthernetNetDevice> net2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<EthernetNetDevice> swnet0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<EthernetNetDevice> swnet1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<EthernetNetDevice> swnet2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
//Create and add a switch net device to the switch node
|
|||
|
|
Ptr<SwitchNetDevice> sw = CreateObject<SwitchNetDevice>();
|
|||
|
|
n3->AddDevice(sw);
|
|||
|
|
sw->AddSwitchPort(swnet0);
|
|||
|
|
sw->AddSwitchPort(swnet1);
|
|||
|
|
sw->AddSwitchPort(swnet2);
|
|||
|
|
|
|||
|
|
//Allocate Mac addresses to the netDevices
|
|||
|
|
net0->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net1->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net2->SetAddress(Mac48Address::Allocate());
|
|||
|
|
sw->SetAddress(Mac48Address::Allocate());
|
|||
|
|
|
|||
|
|
//Create two output port FIFOs for each netDevice.
|
|||
|
|
for (int i=0; i<2; i++){
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>In this code, the following six steps are performed:</p>
|
|||
|
|
<ol>
|
|||
|
|
<li><em>Creating nodes:</em> In this example, four nodes are created.</li>
|
|||
|
|
<li><em>Creating NetDevices:</em> A NetDevice is a network interface in ns-3 terminology. Here, one NetDevice is created and added to each end-station node, and three NetDevices are created and added to the switch node.</li>
|
|||
|
|
<li><em>Creating channels:</em> A channel is a link in ns-3 terminology in the case of the wired network considered here. Thus, three channels are created and attached to different NetDevices to connect the three end stations to the switch.</li>
|
|||
|
|
<li><em>Creating SwitchNetDevices:</em> The SwitchNetDevice is the object that will perform switching between the switch’s NetDevices. Here, a SwitchNetDevice object is created and attached to the switch node. The switch ports are also attached to it.</li>
|
|||
|
|
<li><em>Allocation of Mac addresses:</em> For our example, four mac addresses are allocated using the iterator provided by ns-3.</li>
|
|||
|
|
<li><em>Creation of output port queues:</em> For our example, two FIFOs are instantiated per NetDevices.</li>
|
|||
|
|
</ol>
|
|||
|
|
<p>At this stage, it is possible to run a simulation, but the output will be the same since no traffic is simulated.</p>
|
|||
|
|
<h2 id="traffic-simulation"><a class="header" href="#traffic-simulation">Traffic simulation</a></h2>
|
|||
|
|
<p>To send Ethernet frames in our network, we need to instantiate applications. To instantiate these applications, we must first add the following dependency.</p>
|
|||
|
|
<pre><code class="language-c++">#include “ns3/ethernet-generator.h”
|
|||
|
|
</code></pre>
|
|||
|
|
<p>This dependency is part of Eden-sim and is used to transmit Q-Tagged Ethernet frames.</p>
|
|||
|
|
<p>Next, let’s add an application that sends a burst of two frames with a payload of 1400 bytes, a priority of 1, and a VLAN ID of 1 every 5 seconds. This application is hosted on node ES1. The frames are destined for ES3. Here is the code used to instantiate such an application:</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(2));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
n0->AddApplication(app0);
|
|||
|
|
app0->SetStartTime(Seconds(0));
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>With this simulation script complete, you can run a simulation… And you should see nothing new.</p>
|
|||
|
|
<p>Indeed, there is no indication for ns-3 to produce any output. So our frames are sent in our simulated network, but we have no output to confirm it. To display logs about our frames in the console, let’s add a callback for the transmission and one for the reception.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
NS_LOG_COMPONENT_DEFINE("Chapter 1");
|
|||
|
|
|
|||
|
|
//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " sent!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " received!");
|
|||
|
|
}
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
|
|||
|
|
//Callback declarations
|
|||
|
|
//Callback to display the packet sent log
|
|||
|
|
std::string context = Names::FindName(n0) + ":" + Names::FindName(net0);
|
|||
|
|
net0->TraceConnectWithoutContext("MacTx", MakeBoundCallback(&MacTxCallback, context));
|
|||
|
|
//Callback to display the packet received log
|
|||
|
|
context = Names::FindName(n2) + ":" + Names::FindName(net2);
|
|||
|
|
net2->TraceConnectWithoutContext("MacRx", MakeBoundCallback(&MacRxCallback, context));
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>If you run the simulation again, you should get the following output.</p>
|
|||
|
|
<pre><code class="language-console">$ ./ns3 run scratch/book.cc
|
|||
|
|
[0/2] Re-checking globbed directories...
|
|||
|
|
[2/2] Linking CXX executable ../build/scratch/ns3.40-book-default
|
|||
|
|
Start of the simulation
|
|||
|
|
+0s ES1:ES1#01 : Pkt #0 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #1 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #2 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #3 sent!
|
|||
|
|
End of the simulation
|
|||
|
|
</code></pre>
|
|||
|
|
<p>We can see that four frames are successfully sent by ES1 but are never received by ES3. This is because, after the first hop, the frames are received by the switch but it does not know which port to send them to. It is therefore necessary to add a static forwarding configuration to our switch.</p>
|
|||
|
|
<h2 id="network-configuration"><a class="header" href="#network-configuration">Network configuration</a></h2>
|
|||
|
|
<p>Unlike plug-and-play switches, the switches simulated by Eden-sim are designed for critical embedded networks. To guarantee network determinism, these switches do not implement dynamic mechanisms such as mac learning. They must therefore be configured statically before the simulation begins.</p>
|
|||
|
|
<p>Here, the only configuration missing to transmit frames to ES3 is the configuration of the static switching table. It is possible to add an entry to this table as follows:</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Add a forwarding table entry
|
|||
|
|
sw->AddForwardingTableEntry(Mac48Address::ConvertFrom(net2->GetAddress()), 1, {swnet2});
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>After this configuration, running the simulation produces the following output, which finally indicates the transmission and reception of frames.</p>
|
|||
|
|
<pre><code class="language-console">$ ./ns3 run scratch/book.cc
|
|||
|
|
[0/2] Re-checking globbed directories...
|
|||
|
|
[2/2] Linking CXX executable ../build/scratch/ns3.40-book-default
|
|||
|
|
Start of the simulation
|
|||
|
|
+0s ES1:ES1#01 : Pkt #0 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #1 sent!
|
|||
|
|
+2.293e-05s ES3:ES3#01 : Pkt #0 received!
|
|||
|
|
+3.4466e-05s ES3:ES3#01 : Pkt #1 received!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #2 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #3 sent!
|
|||
|
|
+5.00002s ES3:ES3#01 : Pkt #2 received!
|
|||
|
|
+5.00003s ES3:ES3#01 : Pkt #3 received!
|
|||
|
|
End of the simulation
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="final-simulation-script"><a class="header" href="#final-simulation-script">Final simulation script</a></h2>
|
|||
|
|
<p>Here is the simulation script you should have at the end of this chapter.</p>
|
|||
|
|
<pre><code class="language-c++">#include "ns3/simulator.h"
|
|||
|
|
#include "ns3/core-module.h"
|
|||
|
|
#include "ns3/node.h"
|
|||
|
|
#include "ns3/drop-tail-queue.h"
|
|||
|
|
|
|||
|
|
#include "ns3/ethernet-net-device.h"
|
|||
|
|
#include "ns3/ethernet-channel.h"
|
|||
|
|
#include "ns3/switch-net-device.h"
|
|||
|
|
#include "ns3/ethernet-generator.h"
|
|||
|
|
|
|||
|
|
using namespace ns3;
|
|||
|
|
NS_LOG_COMPONENT_DEFINE("Chapter 1");
|
|||
|
|
|
|||
|
|
//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " sent!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " received!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
main(int argc, char* argv[])
|
|||
|
|
{
|
|||
|
|
//Enable logging
|
|||
|
|
LogComponentEnable("Chapter 1", LOG_LEVEL_INFO);
|
|||
|
|
|
|||
|
|
//Create four nodes
|
|||
|
|
Ptr<Node> n0 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES1", n0);
|
|||
|
|
Ptr<Node> n1 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES2", n1);
|
|||
|
|
Ptr<Node> n2 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES3", n2);
|
|||
|
|
Ptr<Node> n3 = CreateObject<Node>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<EthernetNetDevice> net0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<EthernetNetDevice> net1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<EthernetNetDevice> net2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<EthernetNetDevice> swnet0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<EthernetNetDevice> swnet1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<EthernetNetDevice> swnet2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
//Create and add a switch net device to the switch node
|
|||
|
|
Ptr<SwitchNetDevice> sw = CreateObject<SwitchNetDevice>();
|
|||
|
|
n3->AddDevice(sw);
|
|||
|
|
sw->AddSwitchPort(swnet0);
|
|||
|
|
sw->AddSwitchPort(swnet1);
|
|||
|
|
sw->AddSwitchPort(swnet2);
|
|||
|
|
|
|||
|
|
//Allocate Mac addresses to the netDevices
|
|||
|
|
net0->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net1->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net2->SetAddress(Mac48Address::Allocate());
|
|||
|
|
sw->SetAddress(Mac48Address::Allocate());
|
|||
|
|
|
|||
|
|
//Create 2 output port FIFOs for each netDevice.
|
|||
|
|
for (int i=0; i<2; i++){
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Add a forwarding table entry
|
|||
|
|
sw->AddForwardingTableEntry(Mac48Address::ConvertFrom(net2->GetAddress()), 1, {swnet2});
|
|||
|
|
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(2));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
n0->AddApplication(app0);
|
|||
|
|
app0->SetStartTime(Seconds(0));
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
|
|||
|
|
//Callback declarations
|
|||
|
|
//Callback to display the packet sent log
|
|||
|
|
std::string context = Names::FindName(n0) + ":" + Names::FindName(net0);
|
|||
|
|
net0->TraceConnectWithoutContext("MacTx", MakeBoundCallback(&MacTxCallback, context));
|
|||
|
|
//Callback to display the packet received log
|
|||
|
|
context = Names::FindName(n2) + ":" + Names::FindName(net2);
|
|||
|
|
net2->TraceConnectWithoutContext("MacRx", MakeBoundCallback(&MacRxCallback, context));
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Execute the simulation
|
|||
|
|
NS_LOG_INFO("Start of the simulation");
|
|||
|
|
Simulator::Stop(Seconds(10));
|
|||
|
|
Simulator::Run();
|
|||
|
|
Simulator::Destroy();
|
|||
|
|
NS_LOG_INFO("End of the simulation");
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
</code></pre>
|
|||
|
|
<div style="break-before: page; page-break-before: always;"></div>
|
|||
|
|
<h1 id="network-customization"><a class="header" href="#network-customization">Network customization</a></h1>
|
|||
|
|
<h2 id="introduction-2"><a class="header" href="#introduction-2">Introduction</a></h2>
|
|||
|
|
<p>In the previous chapter, we wrote a simulation script for a simple Ethernet network. In this chapter, we will discuss how to customize it using the attributes of the different classes used.</p>
|
|||
|
|
<h2 id="attributes-in-ns-3"><a class="header" href="#attributes-in-ns-3">Attributes in ns-3</a></h2>
|
|||
|
|
<p>To organize access and configuration of instantiated object parameters, ns-3 uses its own attribute system.</p>
|
|||
|
|
<p>In the previous chapter, we already implemented this overlay using the “SetAttribute()” function to configure the application. This function has two arguments. The first is a string corresponding to the name of the attribute to be changed. The second is the value to be assigned to this attribute.</p>
|
|||
|
|
<p>The various attributes available for each object are visible in the C++ implementation of each object. Here is an example of the EthernetChannel object described in contrib/ethernet/model/ethernet-channel.cc.</p>
|
|||
|
|
<pre><code class="language-c++">TypeId
|
|||
|
|
EthernetChannel::GetTypeId()
|
|||
|
|
{
|
|||
|
|
static TypeId tid =
|
|||
|
|
TypeId("ns3::EthernetChannel")
|
|||
|
|
.SetParent<Channel>()
|
|||
|
|
.SetGroupName("Ethernet")
|
|||
|
|
.AddConstructor<EthernetChannel>()
|
|||
|
|
.AddAttribute("Delay",
|
|||
|
|
"Propagation delay through the channel",
|
|||
|
|
TimeValue(NanoSeconds(25)),
|
|||
|
|
MakeTimeAccessor(&EthernetChannel::m_delay),
|
|||
|
|
MakeTimeChecker())
|
|||
|
|
.AddTraceSource("TxRxEthernet",
|
|||
|
|
"Trace source indicating transmission of packet "
|
|||
|
|
"from the EthernetChannel, used by the Animation "
|
|||
|
|
"interface.",
|
|||
|
|
MakeTraceSourceAccessor(&EthernetChannel::m_txrxEthernet),
|
|||
|
|
"ns3::EthernetChannel::TxRxAnimationCallback");
|
|||
|
|
return tid;
|
|||
|
|
}
|
|||
|
|
</code></pre>
|
|||
|
|
<p>We can see that this object has only one attribute called Delay, which allows you to configure the propagation delay. It is of type Time and has a default value of 25ns.</p>
|
|||
|
|
<p>Thus, it is possible to configure the propagation delay in the previous simulation script as follows:</p>
|
|||
|
|
<pre><code class="language-c++"> [...]
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
channel0->SetAttribute("Delay", TimeValue(NanoSeconds(50)));
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
channel1->SetAttribute("Delay", TimeValue(NanoSeconds(75)));
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
channel2->SetAttribute("Delay", TimeValue(NanoSeconds(100)));
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="common-attributes"><a class="header" href="#common-attributes">Common attributes</a></h2>
|
|||
|
|
<p>Here are examples of the attributes most often used in Ethernet network simulations.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<EthernetNetDevice> net0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<EthernetNetDevice> net1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<EthernetNetDevice> net2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<EthernetNetDevice> swnet0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<EthernetNetDevice> swnet1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<EthernetNetDevice> swnet2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
channel0->SetAttribute("Delay", TimeValue(NanoSeconds(50)));
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
channel1->SetAttribute("Delay", TimeValue(NanoSeconds(75)));
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
channel2->SetAttribute("Delay", TimeValue(NanoSeconds(100)));
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
|
|||
|
|
//Create and add a switch net device to the switch node
|
|||
|
|
Ptr<SwitchNetDevice> sw = CreateObject<SwitchNetDevice>();
|
|||
|
|
sw->SetAttribute("MinForwardingLatency", TimeValue(MicroSeconds(2)));
|
|||
|
|
sw->SetAttribute("MaxForwardingLatency", TimeValue(MicroSeconds(5)));
|
|||
|
|
n3->AddDevice(sw);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
|
|||
|
|
//Create 2 output port FIFOs for each netDevice.
|
|||
|
|
for (int i=0; i<2; i++){
|
|||
|
|
Ptr<DropTailQueue<Packet>> q0 = CreateObject<DropTailQueue<Packet>>();
|
|||
|
|
q0->SetAttribute("MaxSize", QueueSizeValue(QueueSize("250p")));
|
|||
|
|
net0->SetQueue(q0);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(2));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("InterFrame", TimeValue(MilliSeconds(20)));
|
|||
|
|
app0->SetAttribute("Jitter", TimeValue(MilliSeconds(50)));
|
|||
|
|
app0->SetAttribute("Offset", TimeValue(Seconds(1)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("DEI", UintegerValue(0));
|
|||
|
|
[...]
|
|||
|
|
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="final-simulation-script-1"><a class="header" href="#final-simulation-script-1">Final simulation script</a></h2>
|
|||
|
|
<p>Here is the simulation script you should have at the end of this chapter.</p>
|
|||
|
|
<pre><code class="language-c++">#include "ns3/simulator.h"
|
|||
|
|
#include "ns3/core-module.h"
|
|||
|
|
#include "ns3/node.h"
|
|||
|
|
#include "ns3/drop-tail-queue.h"
|
|||
|
|
|
|||
|
|
#include "ns3/ethernet-net-device.h"
|
|||
|
|
#include "ns3/ethernet-channel.h"
|
|||
|
|
#include "ns3/switch-net-device.h"
|
|||
|
|
#include "ns3/ethernet-generator.h"
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
using namespace ns3;
|
|||
|
|
NS_LOG_COMPONENT_DEFINE("Chapter 2");
|
|||
|
|
|
|||
|
|
//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " sent!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " received!");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
main(int argc, char* argv[])
|
|||
|
|
{
|
|||
|
|
//Enable logging
|
|||
|
|
LogComponentEnable("Chapter 2", LOG_LEVEL_INFO);
|
|||
|
|
|
|||
|
|
//Create four nodes
|
|||
|
|
Ptr<Node> n0 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES1", n0);
|
|||
|
|
Ptr<Node> n1 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES2", n1);
|
|||
|
|
Ptr<Node> n2 = CreateObject<Node>();
|
|||
|
|
Names::Add("ES3", n2);
|
|||
|
|
Ptr<Node> n3 = CreateObject<Node>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<EthernetNetDevice> net0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<EthernetNetDevice> net1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<EthernetNetDevice> net2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
net2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<EthernetNetDevice> swnet0 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<EthernetNetDevice> swnet1 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<EthernetNetDevice> swnet2 = CreateObject<EthernetNetDevice>();
|
|||
|
|
swnet2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
channel0->SetAttribute("Delay", TimeValue(NanoSeconds(50)));
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
channel1->SetAttribute("Delay", TimeValue(NanoSeconds(75)));
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
channel2->SetAttribute("Delay", TimeValue(NanoSeconds(100)));
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
//Create and add a switch net device to the switch node
|
|||
|
|
Ptr<SwitchNetDevice> sw = CreateObject<SwitchNetDevice>();
|
|||
|
|
sw->SetAttribute("MinForwardingLatency", TimeValue(MicroSeconds(2)));
|
|||
|
|
sw->SetAttribute("MaxForwardingLatency", TimeValue(MicroSeconds(5)));
|
|||
|
|
n3->AddDevice(sw);
|
|||
|
|
sw->AddSwitchPort(swnet0);
|
|||
|
|
sw->AddSwitchPort(swnet1);
|
|||
|
|
sw->AddSwitchPort(swnet2);
|
|||
|
|
|
|||
|
|
//Allocate Mac addresses to the netDevices
|
|||
|
|
net0->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net1->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net2->SetAddress(Mac48Address::Allocate());
|
|||
|
|
sw->SetAddress(Mac48Address::Allocate());
|
|||
|
|
|
|||
|
|
//Create 2 output port FIFOs for each netDevice.
|
|||
|
|
for (int i=0; i<2; i++){
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Add a forwarding table entry
|
|||
|
|
sw->AddForwardingTableEntry(Mac48Address::ConvertFrom(net2->GetAddress()), 1, {swnet2});
|
|||
|
|
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(2));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("InterFrame", TimeValue(MilliSeconds(20)));
|
|||
|
|
app0->SetAttribute("Jitter", TimeValue(MilliSeconds(50)));
|
|||
|
|
app0->SetAttribute("Offset", TimeValue(Seconds(1)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("DEI", UintegerValue(0));
|
|||
|
|
n0->AddApplication(app0);
|
|||
|
|
app0->SetStartTime(Seconds(0));
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Callback declarations
|
|||
|
|
//Callback to display the packet sent log
|
|||
|
|
std::string context = Names::FindName(n0) + ":" + Names::FindName(net0);
|
|||
|
|
net0->TraceConnectWithoutContext("MacTx", MakeBoundCallback(&MacTxCallback, context));
|
|||
|
|
//Callback to display the packet received log
|
|||
|
|
context = Names::FindName(n2) + ":" + Names::FindName(net2);
|
|||
|
|
net2->TraceConnectWithoutContext("MacRx", MakeBoundCallback(&MacRxCallback, context));
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Execute the simulation
|
|||
|
|
NS_LOG_INFO("Start of the simulation");
|
|||
|
|
Simulator::Stop(Seconds(10));
|
|||
|
|
Simulator::Run();
|
|||
|
|
Simulator::Destroy();
|
|||
|
|
NS_LOG_INFO("End of the simulation");
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
</code></pre>
|
|||
|
|
<div style="break-before: page; page-break-before: always;"></div>
|
|||
|
|
<h1 id="creation-of-a-simple-tsn-network"><a class="header" href="#creation-of-a-simple-tsn-network">Creation of a simple tsn network</a></h1>
|
|||
|
|
<h2 id="introduction-3"><a class="header" href="#introduction-3">Introduction</a></h2>
|
|||
|
|
<p>In this chapter, we will explore how to transform the Ethernet network simulation script from the previous chapter into a TSN network simulation script. Then, we will discuss how to instantiate and configure the various TSN mechanisms supported by the simulation library.</p>
|
|||
|
|
<p>Note that the operation and configuration of TSN mechanisms will not be explained in depth. This chapter assumes that the reader is familiar with the details of the mechanisms implemented.</p>
|
|||
|
|
<h2 id="from-ethernet-to-tsn-simulation"><a class="header" href="#from-ethernet-to-tsn-simulation">From Ethernet to TSN simulation</a></h2>
|
|||
|
|
<p>Let’s start by importing two new objects: TsnNode and TsnNetDevice.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
#include "ns3/tsn-node.h"
|
|||
|
|
#include "ns3/tsn-net-device.h"
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>Next, it is necessary to replace the node and EthernetNetDevice objects with their TSN versions in order to instantiate the various TSN mechanisms described below.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Create four nodes
|
|||
|
|
Ptr<TsnNode> n0 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES1", n0);
|
|||
|
|
Ptr<TsnNode> n1 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES2", n1);
|
|||
|
|
Ptr<TsnNode> n2 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES3", n2);
|
|||
|
|
Ptr<TsnNode> n3 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<TsnNetDevice> net0 = CreateObject<TsnNetDevice>();
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<TsnNetDevice> net1 = CreateObject<TsnNetDevice>();
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<TsnNetDevice> net2 = CreateObject<TsnNetDevice>();
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<TsnNetDevice> swnet0 = CreateObject<TsnNetDevice>();
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<TsnNetDevice> swnet1 = CreateObject<TsnNetDevice>();
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<TsnNetDevice> swnet2 = CreateObject<TsnNetDevice>();
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>At this stage, it is possible to run a simulation, but the result will be identical to a simple Ethernet network.</p>
|
|||
|
|
<p>To simplify the illustration of the latency control mechanisms (CBS and TAS), we can make the following modifications to the application:</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(5));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
n0->AddApplication(app0);
|
|||
|
|
app0->SetStartTime(Seconds(0));
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>The output of a simulation should look like this:</p>
|
|||
|
|
<pre><code class="language-console">[0/2] Re-checking globbed directories...
|
|||
|
|
[2/2] Linking CXX executable ../build/scratch/ns3.40-book-default
|
|||
|
|
Start of the simulation
|
|||
|
|
+0s ES1:ES1#01 : Pkt #0 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #1 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #2 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #3 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #4 sent!
|
|||
|
|
+0.000233905s ES3:ES3#01 : Pkt #0 received!
|
|||
|
|
+0.000349265s ES3:ES3#01 : Pkt #1 received!
|
|||
|
|
+0.000464625s ES3:ES3#01 : Pkt #2 received!
|
|||
|
|
+0.000579985s ES3:ES3#01 : Pkt #3 received!
|
|||
|
|
+0.000695345s ES3:ES3#01 : Pkt #4 received!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #5 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #6 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #7 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #8 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #9 sent!
|
|||
|
|
+5.00023s ES3:ES3#01 : Pkt #5 received!
|
|||
|
|
+5.00035s ES3:ES3#01 : Pkt #6 received!
|
|||
|
|
+5.00046s ES3:ES3#01 : Pkt #7 received!
|
|||
|
|
+5.00058s ES3:ES3#01 : Pkt #8 received!
|
|||
|
|
+5.0007s ES3:ES3#01 : Pkt #9 received!
|
|||
|
|
End of the simulation
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="cbs"><a class="header" href="#cbs">CBS</a></h2>
|
|||
|
|
<p>To instantiate a CBS, we must first add its dependency.</p>
|
|||
|
|
<pre><code class="language-c++">#include "ns3/cbs.h"
|
|||
|
|
</code></pre>
|
|||
|
|
<p>It is then possible to instantiate a CBS and link it to an output port queue. In the following example, we instantiate the CBS on the output port of the transmitting end station.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Create 2 output port FIFOs for each netDevice.
|
|||
|
|
Ptr<Cbs> cbs = CreateObject<Cbs>();
|
|||
|
|
cbs->SetTsnNetDevice(net0);
|
|||
|
|
cbs->SetAttribute("IdleSlope", DataRateValue(DataRate("20Kb/s")));
|
|||
|
|
cbs->SetAttribute("portTransmitRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>()); //FIFO 0
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>(), cbs); //FIFO 1
|
|||
|
|
|
|||
|
|
for (int i=0; i<2; i++){
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>When launching the simulation, we can now see that the reception of burst frames is spread out over time due to the waiting time imposed by the CBS credit reload on the emission port.</p>
|
|||
|
|
<pre><code class="language-console">[0/2] Re-checking globbed directories...
|
|||
|
|
[2/2] Linking CXX executable ../build/scratch/ns3.40-book-default
|
|||
|
|
Start of the simulation
|
|||
|
|
+0s ES1:ES1#01 : Pkt #0 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #1 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #2 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #3 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #4 sent!
|
|||
|
|
+0.000233905s ES3:ES3#01 : Pkt #0 received!
|
|||
|
|
+0.577031s ES3:ES3#01 : Pkt #1 received!
|
|||
|
|
+1.15383s ES3:ES3#01 : Pkt #2 received!
|
|||
|
|
+1.73063s ES3:ES3#01 : Pkt #3 received!
|
|||
|
|
+2.30743s ES3:ES3#01 : Pkt #4 received!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #5 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #6 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #7 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #8 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #9 sent!
|
|||
|
|
+5.00023s ES3:ES3#01 : Pkt #5 received!
|
|||
|
|
+5.57703s ES3:ES3#01 : Pkt #6 received!
|
|||
|
|
+6.15383s ES3:ES3#01 : Pkt #7 received!
|
|||
|
|
+6.73063s ES3:ES3#01 : Pkt #8 received!
|
|||
|
|
+7.30743s ES3:ES3#01 : Pkt #9 received!
|
|||
|
|
End of the simulation
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="tas"><a class="header" href="#tas">TAS</a></h2>
|
|||
|
|
<p>To instanciate TAS, we need to add a clock to the TsnNode, add GCL entries to the net device and add 8 FIFOs to the output ports. It can be done as follows:</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//Add a perfect clock to the SW node
|
|||
|
|
n3->AddClock(CreateObject<Clock>());
|
|||
|
|
[...]
|
|||
|
|
//Create 8 output port FIFOs for each netDevice.
|
|||
|
|
Ptr<Cbs> cbs = CreateObject<Cbs>();
|
|||
|
|
cbs->SetTsnNetDevice(net0);
|
|||
|
|
cbs->SetAttribute("IdleSlope", DataRateValue(DataRate("20Kb/s")));
|
|||
|
|
cbs->SetAttribute("portTransmitRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>()); //FIFO 0
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>(), cbs); //FIFO 1
|
|||
|
|
for (int i=0; i<6; i++){
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>()); //FIFO 0
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for (int i=0; i<8; i++){
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
[...]
|
|||
|
|
//Configure TAS schedule
|
|||
|
|
swnet2->AddGclEntry(Time(Seconds(2)), 0); //All gates are close
|
|||
|
|
swnet2->AddGclEntry(Time(Seconds(3)), 2); //Only the gate of the FIFO 1 is open
|
|||
|
|
swnet2->StartTas();
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>In this example, a TAS schedule is added to the switch’s output port, used by the flow. This schedule is designed to delay the frames of the two bursts by approximately two seconds compared to the previous example. The result obtained is as follows.</p>
|
|||
|
|
<pre><code class="language-console">[0/2] Re-checking globbed directories...
|
|||
|
|
[2/2] Linking CXX executable ../build/scratch/ns3.40-book-default
|
|||
|
|
Start of the simulation
|
|||
|
|
+0s ES1:ES1#01 : Pkt #0 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #1 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #2 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #3 sent!
|
|||
|
|
+0s ES1:ES1#01 : Pkt #4 sent!
|
|||
|
|
+2.00011s ES3:ES3#01 : Pkt #0 received!
|
|||
|
|
+2.00023s ES3:ES3#01 : Pkt #1 received!
|
|||
|
|
+2.00035s ES3:ES3#01 : Pkt #2 received!
|
|||
|
|
+2.00046s ES3:ES3#01 : Pkt #3 received!
|
|||
|
|
+2.30743s ES3:ES3#01 : Pkt #4 received!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #5 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #6 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #7 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #8 sent!
|
|||
|
|
+5s ES1:ES1#01 : Pkt #9 sent!
|
|||
|
|
+7.00011s ES3:ES3#01 : Pkt #5 received!
|
|||
|
|
+7.00023s ES3:ES3#01 : Pkt #6 received!
|
|||
|
|
+7.00035s ES3:ES3#01 : Pkt #7 received!
|
|||
|
|
+7.00046s ES3:ES3#01 : Pkt #8 received!
|
|||
|
|
+7.30743s ES3:ES3#01 : Pkt #9 received!
|
|||
|
|
End of the simulation
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="gptp"><a class="header" href="#gptp">gPTP</a></h2>
|
|||
|
|
<p>To synchronize the nodes in our network using gPTP, several changes must be made. Let’s start with the includes.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
#include "ns3/clock-constant-drift.h"
|
|||
|
|
#include "ns3/gPTP.h"
|
|||
|
|
#include "ns3/ethernet-header2.h"
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>Next, let’s modify the callbacks that log packet transmission and reception so that events are only logged if the VLAN ID matches the VLAN ID of the flows going from ES1 to ES3. This change prevents the output from being flooded with logs concerning the transmission or reception of synchronization frames. We also add a callback to log the difference between the perfect clock (the simulation time) and the device clock after each correction to verify that gPTP is working properly.</p>
|
|||
|
|
<pre><code class="language-c++">//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " sent!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << " received!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log clock offset after correction
|
|||
|
|
static void
|
|||
|
|
ClockAfterCorrectionCallback(std::string context, Time clockValue)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO("[GPTP] At " << Simulator::Now() << " on "<< context << " clock value after correction = " << clockValue.GetNanoSeconds() << "ns (error = "<< (Simulator::Now()-clockValue).GetNanoSeconds() << "ns)");
|
|||
|
|
}
|
|||
|
|
</code></pre>
|
|||
|
|
<p>Next, we replace the perfect clock previously instantiated on n3(SW) in the TAS section with clock instantiation on the various network devices. Note that the clock instantiated on ES1(n0) is a perfect clock (i.e., it corresponds to the simulation time) since it acts as the Grandmaster.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
Ptr<TsnNode> n3 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add clocks to TsnNodes
|
|||
|
|
Ptr<Clock> c0 = CreateObject<Clock>(); //perfect clock because Grandmaster
|
|||
|
|
n0->SetMainClock(c0);
|
|||
|
|
Ptr<ConstantDriftClock> c1 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c1->SetAttribute("InitialOffset", TimeValue(Seconds(20)));
|
|||
|
|
c1->SetAttribute("DriftRate", DoubleValue(-50));
|
|||
|
|
c1->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n1->SetMainClock(c1);
|
|||
|
|
Ptr<ConstantDriftClock> c2 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c2->SetAttribute("InitialOffset", TimeValue(Seconds(3)));
|
|||
|
|
c2->SetAttribute("DriftRate", DoubleValue(2));
|
|||
|
|
c2->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n2->SetMainClock(c2);
|
|||
|
|
Ptr<ConstantDriftClock> c3 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c3->SetAttribute("InitialOffset", TimeValue(Seconds(0.5)));
|
|||
|
|
c3->SetAttribute("DriftRate", DoubleValue(-25));
|
|||
|
|
c3->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n3->SetMainClock(c3);
|
|||
|
|
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>Then, we add and configure the gPTP instances on the different nodes. Note that the implementation of gPTP in Eden-sim only supports static configuration of gPTP (i.e. no BTCA).</p>
|
|||
|
|
<pre><code class="language-c++"> [...]
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Ptr<GPTP> gPTP0 = CreateObject<GPTP>();
|
|||
|
|
gPTP0->SetNode(n0);
|
|||
|
|
gPTP0->SetMainClock(c0);
|
|||
|
|
gPTP0->AddDomain(0);
|
|||
|
|
gPTP0->AddPort(net0, GPTP::MASTER, 0);
|
|||
|
|
gPTP0->SetAttribute("SyncInterval", TimeValue(Seconds(0.125))); //This line is not mandatory because 0.125s is the default value
|
|||
|
|
gPTP0->SetAttribute("PdelayInterval", TimeValue(Seconds(1))); //This line is not mandatory because 1s is the default value
|
|||
|
|
gPTP0->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n0->AddApplication(gPTP0);
|
|||
|
|
gPTP0->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP1 = CreateObject<GPTP>();
|
|||
|
|
gPTP1->SetNode(n1);
|
|||
|
|
gPTP1->SetMainClock(c1);
|
|||
|
|
gPTP1->AddDomain(0);
|
|||
|
|
gPTP1->AddPort(net1, GPTP::SLAVE, 0);
|
|||
|
|
gPTP1->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n1->AddApplication(gPTP1);
|
|||
|
|
gPTP1->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP2 = CreateObject<GPTP>();
|
|||
|
|
gPTP2->SetNode(n2);
|
|||
|
|
gPTP2->SetMainClock(c2);
|
|||
|
|
gPTP2->AddDomain(0);
|
|||
|
|
gPTP2->AddPort(net2, GPTP::SLAVE, 0);
|
|||
|
|
gPTP2->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n2->AddApplication(gPTP2);
|
|||
|
|
gPTP2->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP3 = CreateObject<GPTP>();
|
|||
|
|
gPTP3->SetNode(n3);
|
|||
|
|
gPTP3->SetMainClock(c3);
|
|||
|
|
gPTP3->AddDomain(0);
|
|||
|
|
gPTP3->AddPort(swnet0, GPTP::SLAVE, 0);
|
|||
|
|
gPTP3->AddPort(swnet1, GPTP::MASTER, 0);
|
|||
|
|
gPTP3->AddPort(swnet2, GPTP::MASTER, 0);
|
|||
|
|
gPTP3->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n3->AddApplication(gPTP3);
|
|||
|
|
gPTP3->SetStartTime(Seconds(0));
|
|||
|
|
</code></pre>
|
|||
|
|
<p>And finally, we add the callbacks.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
net2->TraceConnectWithoutContext("MacRx", MakeBoundCallback(&MacRxCallback, context));
|
|||
|
|
//Callback to display clock offset after correction
|
|||
|
|
gPTP1->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n1)));
|
|||
|
|
gPTP2->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n2)));
|
|||
|
|
gPTP3->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n3)));
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>When running the simulation, we can observe that gPTP effectively mitigates clock drift thanks to periodic synchronization on SW and ES2. However, we note that there is no gPTP log for ES3. This is due to the TAS configuration, which never opens the FIFO7 gate used by synchronization messages. Of course, such a configuration has no place in a network that is intended to be functional, but in this example it illustrates the impact of the TAS configuration on gPTP packets.</p>
|
|||
|
|
<h2 id="stream-identification"><a class="header" href="#stream-identification">Stream Identification</a></h2>
|
|||
|
|
<p>Before using PSFP or FRER, it is necessary to implement an identification function. In this section, we will use a null Stream identification function on the switch port connected to ES1. This function will then be used in the following two sections to implement PSFP in order to validate the flow contract and to replicate frames using FRER.</p>
|
|||
|
|
<p>Let’s start by importing this function.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
#include "ns3/stream-identification-function-null.h"
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>Next, let’s create and add the identification function on port swnet0 in input and outfacing mode.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
swnet2->StartTas();
|
|||
|
|
|
|||
|
|
//Add a stream identification function
|
|||
|
|
Ptr<NullStreamIdentificationFunction> sif0 = CreateObject<NullStreamIdentificationFunction>();
|
|||
|
|
uint16_t StreamHandle = 10;
|
|||
|
|
sif0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
sif0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
n3->AddStreamIdentificationFunction(StreamHandle, sif0, {swnet0}, {}, {}, {});
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="psfp"><a class="header" href="#psfp">PSFP</a></h2>
|
|||
|
|
<p>Now that we have an identification function capable of identifying frames going from ES1 to ES3 with VLAN ID 1, we can set up a PSFP instance to validate compliance with a network usage contract. Currently, the simulator implements the stream filter and the flow meter. They can be added and configured as follows.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
n3->AddStreamIdentificationFunction(StreamHandle, sif0, {swnet0}, {}, {}, {});
|
|||
|
|
|
|||
|
|
//PSFP configuration
|
|||
|
|
Ptr<StreamFilterInstance> sfi0 = CreateObject<StreamFilterInstance>();
|
|||
|
|
sfi0->SetAttribute("StreamHandle", IntegerValue(StreamHandle));
|
|||
|
|
sfi0->SetAttribute("Priority", IntegerValue(-1)); //-1 = wildcard
|
|||
|
|
sfi0->SetAttribute("MaxSDUSize", UintegerValue(1422));
|
|||
|
|
n3->AddStreamFilter(sfi0);
|
|||
|
|
Ptr<FlowMeterInstance> fm0 = CreateObject<FlowMeterInstance>();
|
|||
|
|
fm0->SetAttribute("CIR", DataRateValue(DataRate("20Kb/s")));
|
|||
|
|
fm0->SetAttribute("CBS", UintegerValue(1400));
|
|||
|
|
fm0->SetAttribute("DropOnYellow", BooleanValue(true));
|
|||
|
|
fm0->SetAttribute("MarkAllFramesRedEnable", BooleanValue(false));
|
|||
|
|
uint16_t fmid = n3->AddFlowMeter(fm0);
|
|||
|
|
sfi0->AddFlowMeterInstanceId(fmid);
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>After these changes, running the simulation does not produce a different output from previous runs. However, by changing the parameters of the emitting application to increase its bandwidth consumption (e.g., increasing the packet size) or by increasing the idle slope of the CBS, it is possible to observe that packets that do not comply with the contract are never received as they are discarded.</p>
|
|||
|
|
<h2 id="frer"><a class="header" href="#frer">FRER</a></h2>
|
|||
|
|
<p>And finally, let’s instantiate FRER. However, the topology we are working with in this chapter does not have multiple paths between ES1 and ES3. So in this section, we will replicate the frames on the output ports of the switch connected to ES2 and ES3 to illustrate the philosophy behind FRER instantiation. We will only detail the replication part. The elimination part is detailed in the example contrib/tsn/examples/tsn-switched-withFRER.cc, which has a topology much more suited to the use of FRER.</p>
|
|||
|
|
<p>Replication with FRER is based on two functions: Sequence Generation Function and Sequence Encode/Decode Function. These two functions are created and configured as follows.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
sfi0->AddFlowMeterInstanceId(fmid);
|
|||
|
|
|
|||
|
|
//Sequencing : Sequence generation
|
|||
|
|
Ptr<SequenceGenerationFunction> seqf0 = CreateObject<SequenceGenerationFunction>();
|
|||
|
|
seqf0->SetAttribute("Direction", BooleanValue(false)); //in-facing
|
|||
|
|
seqf0->SetStreamHandle({StreamHandle});
|
|||
|
|
n3->AddSequenceGenerationFunction(seqf0);
|
|||
|
|
//Sequence encode
|
|||
|
|
Ptr<SequenceEncodeDecodeFunction> seqEnc0 = CreateObject<SequenceEncodeDecodeFunction>();
|
|||
|
|
seqEnc0->SetAttribute("Direction", BooleanValue(false)); //in-facing
|
|||
|
|
seqEnc0->SetAttribute("Active", BooleanValue(true));
|
|||
|
|
seqEnc0->SetStreamHandle({StreamHandle});
|
|||
|
|
seqEnc0->SetPort(swnet0);
|
|||
|
|
n3->AddSequenceEncodeDecodeFunction(seqEnc0);
|
|||
|
|
|
|||
|
|
//Add a forwarding table entry
|
|||
|
|
sw->AddForwardingTableEntry(Mac48Address::ConvertFrom(net2->GetAddress()), 1, {swnet1, swnet2});
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>With this configuration, replication is achieved by forwarding to two different ports. This simplifies configuration by not using the FRER splitting function. However, it is necessary to change the configuration of the forwarding table as shown in the previous listing.</p>
|
|||
|
|
<p>In order to validate the correct operation of the replication (i.e., the addition of the R-TAG), modify the callbacks as follows to display the frame size at transmission and reception.</p>
|
|||
|
|
<pre><code class="language-c++">[...]
|
|||
|
|
//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << "(" << p->GetSize() << "bytes) sent!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << "(" << p->GetSize() << "bytes) received!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<p>And now, when running the simulation script, we observe an increase in frame size of 6 bytes (the size of R-TAG) between transmission and reception, as illustrated below.</p>
|
|||
|
|
<pre><code class="language-console">[...]
|
|||
|
|
+5s ES1:ES1#01 : Pkt #215(1422bytes) sent!
|
|||
|
|
[...]
|
|||
|
|
+7.30743s ES3:ES3#01 : Pkt #215(1428bytes) received!
|
|||
|
|
[...]
|
|||
|
|
</code></pre>
|
|||
|
|
<h2 id="conclusion-and-final-simulation-script"><a class="header" href="#conclusion-and-final-simulation-script">Conclusion and final simulation script</a></h2>
|
|||
|
|
<p>In this section, we have implemented the various TSN mechanisms of Eden-sim.</p>
|
|||
|
|
<p>Note that the examples found in contrib/tsn/examples/ illustrate more complicated configurations and implement different traces to log information about the mechanism’s operation. These examples are a good means of further exploring the uses of these TSN mechanisms.</p>
|
|||
|
|
<p>Here is the script at the end of this chapter:</p>
|
|||
|
|
<pre><code class="language-c++">#include "ns3/simulator.h"
|
|||
|
|
#include "ns3/core-module.h"
|
|||
|
|
#include "ns3/node.h"
|
|||
|
|
#include "ns3/drop-tail-queue.h"
|
|||
|
|
|
|||
|
|
#include "ns3/tsn-node.h"
|
|||
|
|
#include "ns3/tsn-net-device.h"
|
|||
|
|
#include "ns3/cbs.h"
|
|||
|
|
#include "ns3/ethernet-channel.h"
|
|||
|
|
#include "ns3/switch-net-device.h"
|
|||
|
|
#include "ns3/ethernet-generator.h"
|
|||
|
|
#include "ns3/clock-constant-drift.h"
|
|||
|
|
#include "ns3/gPTP.h"
|
|||
|
|
#include "ns3/ethernet-header2.h"
|
|||
|
|
#include "ns3/stream-identification-function-null.h"
|
|||
|
|
|
|||
|
|
using namespace ns3;
|
|||
|
|
NS_LOG_COMPONENT_DEFINE("Chapter 3");
|
|||
|
|
|
|||
|
|
//A callback to log the pkt emission
|
|||
|
|
static void
|
|||
|
|
MacTxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << "(" << p->GetSize() << "bytes) sent!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log the pkt reception
|
|||
|
|
static void
|
|||
|
|
MacRxCallback(std::string context, Ptr<const Packet> p)
|
|||
|
|
{
|
|||
|
|
Ptr<Packet> pkt = p->Copy();
|
|||
|
|
EthernetHeader2 ethHeader;
|
|||
|
|
pkt->RemoveHeader(ethHeader);
|
|||
|
|
if (ethHeader.GetVid() == 1) {
|
|||
|
|
NS_LOG_INFO((Simulator::Now()).As(Time::S) << " \t" << context << " : Pkt #" << p->GetUid() << "(" << p->GetSize() << "bytes) received!");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//A callback to log clock offset after correction
|
|||
|
|
static void
|
|||
|
|
ClockAfterCorrectionCallback(std::string context, Time clockValue)
|
|||
|
|
{
|
|||
|
|
NS_LOG_INFO("[GPTP] At " << Simulator::Now() << " on "<< context << " clock value after correction = " << clockValue.GetNanoSeconds() << "ns (error = "<< (Simulator::Now()-clockValue).GetNanoSeconds() << "ns)");
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
main(int argc, char* argv[])
|
|||
|
|
{
|
|||
|
|
//Enable logging
|
|||
|
|
LogComponentEnable("Chapter 3", LOG_LEVEL_INFO);
|
|||
|
|
|
|||
|
|
//Create four nodes
|
|||
|
|
Ptr<TsnNode> n0 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES1", n0);
|
|||
|
|
Ptr<TsnNode> n1 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES2", n1);
|
|||
|
|
Ptr<TsnNode> n2 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("ES3", n2);
|
|||
|
|
Ptr<TsnNode> n3 = CreateObject<TsnNode>();
|
|||
|
|
Names::Add("SW", n3);
|
|||
|
|
|
|||
|
|
//Create and add clocks to TsnNodes
|
|||
|
|
Ptr<Clock> c0 = CreateObject<Clock>(); //perfect clock because Grandmaster
|
|||
|
|
n0->SetMainClock(c0);
|
|||
|
|
Ptr<ConstantDriftClock> c1 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c1->SetAttribute("InitialOffset", TimeValue(Seconds(20)));
|
|||
|
|
c1->SetAttribute("DriftRate", DoubleValue(-50));
|
|||
|
|
c1->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n1->SetMainClock(c1);
|
|||
|
|
Ptr<ConstantDriftClock> c2 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c2->SetAttribute("InitialOffset", TimeValue(Seconds(3)));
|
|||
|
|
c2->SetAttribute("DriftRate", DoubleValue(2));
|
|||
|
|
c2->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n2->SetMainClock(c2);
|
|||
|
|
Ptr<ConstantDriftClock> c3 = CreateObject<ConstantDriftClock>();
|
|||
|
|
c3->SetAttribute("InitialOffset", TimeValue(Seconds(0.5)));
|
|||
|
|
c3->SetAttribute("DriftRate", DoubleValue(-25));
|
|||
|
|
c3->SetAttribute("Granularity", TimeValue(NanoSeconds(10)));
|
|||
|
|
n3->SetMainClock(c3);
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Create and add a netDevice to each end-station node
|
|||
|
|
Ptr<TsnNetDevice> net0 = CreateObject<TsnNetDevice>();
|
|||
|
|
net0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n0->AddDevice(net0);
|
|||
|
|
Names::Add("ES1#01", net0);
|
|||
|
|
Ptr<TsnNetDevice> net1 = CreateObject<TsnNetDevice>();
|
|||
|
|
net1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n1->AddDevice(net1);
|
|||
|
|
Names::Add("ES2#01", net1);
|
|||
|
|
Ptr<TsnNetDevice> net2 = CreateObject<TsnNetDevice>();
|
|||
|
|
net2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n2->AddDevice(net2);
|
|||
|
|
Names::Add("ES3#01", net2);
|
|||
|
|
//Create and add a netDevice to each switch port
|
|||
|
|
Ptr<TsnNetDevice> swnet0 = CreateObject<TsnNetDevice>();
|
|||
|
|
swnet0->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet0);
|
|||
|
|
Names::Add("SW#01", swnet0);
|
|||
|
|
Ptr<TsnNetDevice> swnet1 = CreateObject<TsnNetDevice>();
|
|||
|
|
swnet1->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet1);
|
|||
|
|
Names::Add("SW#02", swnet1);
|
|||
|
|
Ptr<TsnNetDevice> swnet2 = CreateObject<TsnNetDevice>();
|
|||
|
|
swnet2->SetAttribute("DataRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
n3->AddDevice(swnet2);
|
|||
|
|
Names::Add("SW#03", swnet2);
|
|||
|
|
|
|||
|
|
//Create Ethernet Channels and connect switch to the end-stations
|
|||
|
|
Ptr<EthernetChannel> channel0 = CreateObject<EthernetChannel>();
|
|||
|
|
channel0->SetAttribute("Delay", TimeValue(NanoSeconds(50)));
|
|||
|
|
net0->Attach(channel0);
|
|||
|
|
swnet0->Attach(channel0);
|
|||
|
|
Ptr<EthernetChannel> channel1 = CreateObject<EthernetChannel>();
|
|||
|
|
channel1->SetAttribute("Delay", TimeValue(NanoSeconds(75)));
|
|||
|
|
net1->Attach(channel1);
|
|||
|
|
swnet1->Attach(channel1);
|
|||
|
|
Ptr<EthernetChannel> channel2 = CreateObject<EthernetChannel>();
|
|||
|
|
channel2->SetAttribute("Delay", TimeValue(NanoSeconds(100)));
|
|||
|
|
net2->Attach(channel2);
|
|||
|
|
swnet2->Attach(channel2);
|
|||
|
|
|
|||
|
|
//Create and add a switch net device to the switch node
|
|||
|
|
Ptr<SwitchNetDevice> sw = CreateObject<SwitchNetDevice>();
|
|||
|
|
sw->SetAttribute("MinForwardingLatency", TimeValue(MicroSeconds(2)));
|
|||
|
|
sw->SetAttribute("MaxForwardingLatency", TimeValue(MicroSeconds(5)));
|
|||
|
|
n3->AddDevice(sw);
|
|||
|
|
sw->AddSwitchPort(swnet0);
|
|||
|
|
sw->AddSwitchPort(swnet1);
|
|||
|
|
sw->AddSwitchPort(swnet2);
|
|||
|
|
|
|||
|
|
//Allocate Mac addresses to the netDevices
|
|||
|
|
net0->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net1->SetAddress(Mac48Address::Allocate());
|
|||
|
|
net2->SetAddress(Mac48Address::Allocate());
|
|||
|
|
sw->SetAddress(Mac48Address::Allocate());
|
|||
|
|
|
|||
|
|
//Create 8 output port FIFOs for each netDevice.
|
|||
|
|
Ptr<Cbs> cbs = CreateObject<Cbs>();
|
|||
|
|
cbs->SetTsnNetDevice(net0);
|
|||
|
|
cbs->SetAttribute("IdleSlope", DataRateValue(DataRate("20Kb/s")));
|
|||
|
|
cbs->SetAttribute("portTransmitRate", DataRateValue(DataRate("100Mb/s")));
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>()); //FIFO 0
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>(), cbs); //FIFO 1
|
|||
|
|
for (int i=0; i<6; i++){
|
|||
|
|
net0->SetQueue(CreateObject<DropTailQueue<Packet>>()); //FIFO 0
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for (int i=0; i<8; i++){
|
|||
|
|
net1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
net2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet0->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet1->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
swnet2->SetQueue(CreateObject<DropTailQueue<Packet>>());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//Add and configure gPTP
|
|||
|
|
Ptr<GPTP> gPTP0 = CreateObject<GPTP>();
|
|||
|
|
gPTP0->SetNode(n0);
|
|||
|
|
gPTP0->SetMainClock(c0);
|
|||
|
|
gPTP0->AddDomain(0);
|
|||
|
|
gPTP0->AddPort(net0, GPTP::MASTER, 0);
|
|||
|
|
gPTP0->SetAttribute("SyncInterval", TimeValue(Seconds(0.125))); //This line is not mandatory because 0.125s is the default value
|
|||
|
|
gPTP0->SetAttribute("PdelayInterval", TimeValue(Seconds(1))); //This line is not mandatory because 1s is the default value
|
|||
|
|
gPTP0->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n0->AddApplication(gPTP0);
|
|||
|
|
gPTP0->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP1 = CreateObject<GPTP>();
|
|||
|
|
gPTP1->SetNode(n1);
|
|||
|
|
gPTP1->SetMainClock(c1);
|
|||
|
|
gPTP1->AddDomain(0);
|
|||
|
|
gPTP1->AddPort(net1, GPTP::SLAVE, 0);
|
|||
|
|
gPTP1->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n1->AddApplication(gPTP1);
|
|||
|
|
gPTP1->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP2 = CreateObject<GPTP>();
|
|||
|
|
gPTP2->SetNode(n2);
|
|||
|
|
gPTP2->SetMainClock(c2);
|
|||
|
|
gPTP2->AddDomain(0);
|
|||
|
|
gPTP2->AddPort(net2, GPTP::SLAVE, 0);
|
|||
|
|
gPTP2->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n2->AddApplication(gPTP2);
|
|||
|
|
gPTP2->SetStartTime(Seconds(0));
|
|||
|
|
Ptr<GPTP> gPTP3 = CreateObject<GPTP>();
|
|||
|
|
gPTP3->SetNode(n3);
|
|||
|
|
gPTP3->SetMainClock(c3);
|
|||
|
|
gPTP3->AddDomain(0);
|
|||
|
|
gPTP3->AddPort(swnet0, GPTP::SLAVE, 0);
|
|||
|
|
gPTP3->AddPort(swnet1, GPTP::MASTER, 0);
|
|||
|
|
gPTP3->AddPort(swnet2, GPTP::MASTER, 0);
|
|||
|
|
gPTP3->SetAttribute("Priority", UintegerValue(7));
|
|||
|
|
n3->AddApplication(gPTP3);
|
|||
|
|
gPTP3->SetStartTime(Seconds(0));
|
|||
|
|
|
|||
|
|
//Configure TAS schedule
|
|||
|
|
swnet2->AddGclEntry(Time(Seconds(2)), 0); //All gates are close
|
|||
|
|
swnet2->AddGclEntry(Time(Seconds(3)), 2); //Only the gate of the FIFO 1 is open
|
|||
|
|
swnet2->StartTas();
|
|||
|
|
|
|||
|
|
//Add a stream identification function
|
|||
|
|
Ptr<NullStreamIdentificationFunction> sif0 = CreateObject<NullStreamIdentificationFunction>();
|
|||
|
|
uint16_t StreamHandle = 10;
|
|||
|
|
sif0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
sif0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
n3->AddStreamIdentificationFunction(StreamHandle, sif0, {swnet0}, {}, {}, {});
|
|||
|
|
|
|||
|
|
//PSFP configuration
|
|||
|
|
Ptr<StreamFilterInstance> sfi0 = CreateObject<StreamFilterInstance>();
|
|||
|
|
sfi0->SetAttribute("StreamHandle", IntegerValue(StreamHandle));
|
|||
|
|
sfi0->SetAttribute("Priority", IntegerValue(-1)); //-1 = wildcard
|
|||
|
|
sfi0->SetAttribute("MaxSDUSize", UintegerValue(1422));
|
|||
|
|
n3->AddStreamFilter(sfi0);
|
|||
|
|
Ptr<FlowMeterInstance> fm0 = CreateObject<FlowMeterInstance>();
|
|||
|
|
fm0->SetAttribute("CIR", DataRateValue(DataRate("20Kb/s")));
|
|||
|
|
fm0->SetAttribute("CBS", UintegerValue(1400));
|
|||
|
|
fm0->SetAttribute("DropOnYellow", BooleanValue(true));
|
|||
|
|
fm0->SetAttribute("MarkAllFramesRedEnable", BooleanValue(false));
|
|||
|
|
uint16_t fmid = n3->AddFlowMeter(fm0);
|
|||
|
|
sfi0->AddFlowMeterInstanceId(fmid);
|
|||
|
|
|
|||
|
|
//Sequencing : Sequence generation
|
|||
|
|
Ptr<SequenceGenerationFunction> seqf0 = CreateObject<SequenceGenerationFunction>();
|
|||
|
|
seqf0->SetAttribute("Direction", BooleanValue(false)); //in-facing
|
|||
|
|
seqf0->SetStreamHandle({StreamHandle});
|
|||
|
|
n3->AddSequenceGenerationFunction(seqf0);
|
|||
|
|
//Sequence encode
|
|||
|
|
Ptr<SequenceEncodeDecodeFunction> seqEnc0 = CreateObject<SequenceEncodeDecodeFunction>();
|
|||
|
|
seqEnc0->SetAttribute("Direction", BooleanValue(false)); //in-facing
|
|||
|
|
seqEnc0->SetAttribute("Active", BooleanValue(true));
|
|||
|
|
seqEnc0->SetStreamHandle({StreamHandle});
|
|||
|
|
seqEnc0->SetPort(swnet0);
|
|||
|
|
n3->AddSequenceEncodeDecodeFunction(seqEnc0);
|
|||
|
|
|
|||
|
|
//Add a forwarding table entry
|
|||
|
|
sw->AddForwardingTableEntry(Mac48Address::ConvertFrom(net2->GetAddress()), 1, {swnet1, swnet2});
|
|||
|
|
|
|||
|
|
//Application description
|
|||
|
|
//ES1 -> ES3 with priority 1
|
|||
|
|
Ptr<EthernetGenerator> app0 = CreateObject<EthernetGenerator>();
|
|||
|
|
app0->Setup(net0);
|
|||
|
|
app0->SetAttribute("Address", AddressValue(net2->GetAddress()));
|
|||
|
|
app0->SetAttribute("BurstSize", UintegerValue(5));
|
|||
|
|
app0->SetAttribute("PayloadSize", UintegerValue(1400));
|
|||
|
|
app0->SetAttribute("Period", TimeValue(Seconds(5)));
|
|||
|
|
app0->SetAttribute("VlanID", UintegerValue(1));
|
|||
|
|
app0->SetAttribute("PCP", UintegerValue(1));
|
|||
|
|
n0->AddApplication(app0);
|
|||
|
|
app0->SetStartTime(Seconds(0));
|
|||
|
|
app0->SetStopTime(Seconds(10));
|
|||
|
|
|
|||
|
|
//Callback declarations
|
|||
|
|
//Callback to display the packet sent log
|
|||
|
|
std::string context = Names::FindName(n0) + ":" + Names::FindName(net0);
|
|||
|
|
net0->TraceConnectWithoutContext("MacTx", MakeBoundCallback(&MacTxCallback, context));
|
|||
|
|
//Callback to display the packet received log
|
|||
|
|
context = Names::FindName(n2) + ":" + Names::FindName(net2);
|
|||
|
|
net2->TraceConnectWithoutContext("MacRx", MakeBoundCallback(&MacRxCallback, context));
|
|||
|
|
//Callback to display clock offset after correction
|
|||
|
|
gPTP1->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n1)));
|
|||
|
|
gPTP2->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n2)));
|
|||
|
|
gPTP3->TraceConnectWithoutContext("ClockAfterCorrection", MakeBoundCallback(&ClockAfterCorrectionCallback, Names::FindName(n3)));
|
|||
|
|
|
|||
|
|
|
|||
|
|
//Execute the simulation
|
|||
|
|
NS_LOG_INFO("Start of the simulation");
|
|||
|
|
Simulator::Stop(Seconds(10));
|
|||
|
|
Simulator::Run();
|
|||
|
|
Simulator::Destroy();
|
|||
|
|
NS_LOG_INFO("End of the simulation");
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
</code></pre>
|
|||
|
|
|
|||
|
|
</main>
|
|||
|
|
|
|||
|
|
<nav class="nav-wrapper" aria-label="Page navigation">
|
|||
|
|
<!-- Mobile navigation buttons -->
|
|||
|
|
|
|||
|
|
|
|||
|
|
<div style="clear: both"></div>
|
|||
|
|
</nav>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<nav class="nav-wide-wrapper" aria-label="Page navigation">
|
|||
|
|
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<template id=fa-eye><span class=fa-svg><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M288 32c-80.8 0-145.5 36.8-192.6 80.6C48.6 156 17.3 208 2.5 243.7c-3.3 7.9-3.3 16.7 0 24.6C17.3 304 48.6 356 95.4 399.4C142.5 443.2 207.2 480 288 480s145.5-36.8 192.6-80.6c46.8-43.5 78.1-95.4 93-131.1c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C433.5 68.8 368.8 32 288 32zM432 256c0 79.5-64.5 144-144 144s-144-64.5-144-144s64.5-144 144-144s144 64.5 144 144zM288 192c0 35.3-28.7 64-64 64c-11.5 0-22.3-3-31.6-8.4c-.2 2.8-.4 5.5-.4 8.4c0 53 43 96 96 96s96-43 96-96s-43-96-96-96c-2.8 0-5.6 .1-8.4 .4c5.3 9.3 8.4 20.1 8.4 31.6z"/></svg></span></template>
|
|||
|
|
<template id=fa-eye-slash><span class=fa-svg><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 640 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M38.8 5.1C28.4-3.1 13.3-1.2 5.1 9.2S-1.2 34.7 9.2 42.9l592 464c10.4 8.2 25.5 6.3 33.7-4.1s6.3-25.5-4.1-33.7L525.6 386.7c39.6-40.6 66.4-86.1 79.9-118.4c3.3-7.9 3.3-16.7 0-24.6c-14.9-35.7-46.2-87.7-93-131.1C465.5 68.8 400.8 32 320 32c-68.2 0-125 26.3-169.3 60.8L38.8 5.1zM223.1 149.5C248.6 126.2 282.7 112 320 112c79.5 0 144 64.5 144 144c0 24.9-6.3 48.3-17.4 68.7L408 294.5c5.2-11.8 8-24.8 8-38.5c0-53-43-96-96-96c-2.8 0-5.6 .1-8.4 .4c5.3 9.3 8.4 20.1 8.4 31.6c0 10.2-2.4 19.8-6.6 28.3l-90.3-70.8zm223.1 298L373 389.9c-16.4 6.5-34.3 10.1-53 10.1c-79.5 0-144-64.5-144-144c0-6.9 .5-13.6 1.4-20.2L83.1 161.5C60.3 191.2 44 220.8 34.5 243.7c-3.3 7.9-3.3 16.7 0 24.6c14.9 35.7 46.2 87.7 93 131.1C174.5 443.2 239.2 480 320 480c47.8 0 89.9-12.9 126.2-32.5z"/></svg></span></template>
|
|||
|
|
<template id=fa-copy><span class=fa-svg><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M502.6 70.63l-61.25-61.25C435.4 3.371 427.2 0 418.7 0H255.1c-35.35 0-64 28.66-64 64l.0195 256C192 355.4 220.7 384 256 384h192c35.2 0 64-28.8 64-64V93.25C512 84.77 508.6 76.63 502.6 70.63zM464 320c0 8.836-7.164 16-16 16H255.1c-8.838 0-16-7.164-16-16L239.1 64.13c0-8.836 7.164-16 16-16h128L384 96c0 17.67 14.33 32 32 32h47.1V320zM272 448c0 8.836-7.164 16-16 16H63.1c-8.838 0-16-7.164-16-16L47.98 192.1c0-8.836 7.164-16 16-16H160V128H63.99c-35.35 0-64 28.65-64 64l.0098 256C.002 483.3 28.66 512 64 512h192c35.2 0 64-28.8 64-64v-32h-47.1L272 448z"/></svg></span></template>
|
|||
|
|
<template id=fa-play><span class=fa-svg><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 384 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M73 39c-14.8-9.1-33.4-9.4-48.5-.9S0 62.6 0 80V432c0 17.4 9.4 33.4 24.5 41.9s33.7 8.1 48.5-.9L361 297c14.3-8.7 23-24.2 23-41s-8.7-32.2-23-41L73 39z"/></svg></span></template>
|
|||
|
|
<template id=fa-clock-rotate-left><span class=fa-svg><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M75 75L41 41C25.9 25.9 0 36.6 0 57.9V168c0 13.3 10.7 24 24 24H134.1c21.4 0 32.1-25.9 17-41l-30.8-30.8C155 85.5 203 64 256 64c106 0 192 86 192 192s-86 192-192 192c-40.8 0-78.6-12.7-109.7-34.4c-14.5-10.1-34.4-6.6-44.6 7.9s-6.6 34.4 7.9 44.6C151.2 495 201.7 512 256 512c141.4 0 256-114.6 256-256S397.4 0 256 0C185.3 0 121.3 28.7 75 75zm181 53c-13.3 0-24 10.7-24 24V256c0 6.4 2.5 12.5 7 17l72 72c9.4 9.4 24.6 9.4 33.9 0s9.4-24.6 0-33.9l-65-65V152c0-13.3-10.7-24-24-24z"/></svg></span></template>
|
|||
|
|
|
|||
|
|
<!-- Livereload script (if served using the cli tool) -->
|
|||
|
|
<script>
|
|||
|
|
const wsProtocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
|
|||
|
|
const wsAddress = wsProtocol + "//" + location.host + "/" + "__livereload";
|
|||
|
|
const socket = new WebSocket(wsAddress);
|
|||
|
|
socket.onmessage = function (event) {
|
|||
|
|
if (event.data === "reload") {
|
|||
|
|
socket.close();
|
|||
|
|
location.reload();
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
window.onbeforeunload = function() {
|
|||
|
|
socket.close();
|
|||
|
|
}
|
|||
|
|
</script>
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script>
|
|||
|
|
window.playground_copyable = true;
|
|||
|
|
</script>
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script src="elasticlunr-ef4e11c1.min.js"></script>
|
|||
|
|
<script src="mark-09e88c2c.min.js"></script>
|
|||
|
|
<script src="searcher-c2a407aa.js"></script>
|
|||
|
|
|
|||
|
|
<script src="clipboard-1626706a.min.js"></script>
|
|||
|
|
<script src="highlight-abc7f01d.js"></script>
|
|||
|
|
<script src="book-a0b12cfe.js"></script>
|
|||
|
|
|
|||
|
|
<!-- Custom JS scripts -->
|
|||
|
|
|
|||
|
|
<script>
|
|||
|
|
window.addEventListener('load', function() {
|
|||
|
|
window.setTimeout(window.print, 100);
|
|||
|
|
});
|
|||
|
|
</script>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|