To implement the Network Service Orchestration (NSO) in ns3 has includes to generate a system to handle and automate the deployment, coordination and manage the network services. This is specifically helpful in Software-Defined Networking (SDN) and Network Function Virtualization (NFV) environments.
The below is the detailed procedure on how to implement and execute the network service orchestration in ns3:
Step-by-Step Implementation:
- Install ns3: Make sure ns3 is installed in the system.
- Define Network Services: if we need to orchestrate then identify and describe the network services that contain the virtualized network functions (VNFs) like firewalls, load balancers, and routers.
- Set up Network Topology: Create the network topology in ns3 that contain nodes, links, and network configurations.
- Implement Orchestration Logic: To improve the orchestration logic to handle the lifecycle of network services that includes deployment, configuration, scaling, and termination.
- Integrate with SDN/NFV Frameworks: If applicable, integrate your ns3 simulation with SDN controllers and NFV orchestrators.
Detailed Implementation
- Install ns3: Follow the installation.
- Define Network Services: if we want to orchestrate then describe the network services. For simplicity, we’ll define a basic firewall and load balancer as examples.
- Set up Network Topology: Create an ns3 script that models your network topology.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE(“NetworkServiceOrchestrationExample”);
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(4);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes.Get(0), nodes.Get(1));
devices.Add(pointToPoint.Install(nodes.Get(1), nodes.Get(2)));
devices.Add(pointToPoint.Install(nodes.Get(2), nodes.Get(3)));
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
address.Assign(devices);
UdpEchoServerHelper echoServer(9);
ApplicationContainer serverApps = echoServer.Install(nodes.Get(3));
serverApps.Start(Seconds(1.0));
serverApps.Stop(Seconds(10.0));
UdpEchoClientHelper echoClient(address.GetAddress(3), 9);
echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));
echoClient.SetAttribute(“Interval”, TimeValue(Seconds(1.0)));
echoClient.SetAttribute(“PacketSize”, UintegerValue(1024));
ApplicationContainer clientApps = echoClient.Install(nodes.Get(0));
clientApps.Start(Seconds(2.0));
clientApps.Stop(Seconds(10.0));
Simulator::Run();
Simulator::Destroy();
return 0;
}
Implement Orchestration Logic: Develop a script to handle the orchestration logic, managing the lifecycle of network services.
// orchestration-helper.h
#include “ns3/node-container.h”
#include “ns3/application-container.h”
#include “ns3/internet-module.h”
namespace ns3 {
class OrchestrationHelper {
public:
OrchestrationHelper();
void DeployFirewall(NodeContainer nodes);
void DeployLoadBalancer(NodeContainer nodes);
void ScaleService(NodeContainer nodes);
void TerminateService(NodeContainer nodes);
private:
ApplicationContainer m_firewallApps;
ApplicationContainer m_loadBalancerApps;
};
} // namespace ns3
// orchestration-helper.cc
#include “orchestration-helper.h”
#include “ns3/uinteger.h”
#include “ns3/udp-echo-helper.h”
namespace ns3 {
OrchestrationHelper::OrchestrationHelper() {}
void OrchestrationHelper::DeployFirewall(NodeContainer nodes) {
// Implement firewall deployment logic
// For example, install a packet filter application
UdpEchoServerHelper echoServer(10);
m_firewallApps = echoServer.Install(nodes.Get(1));
m_firewallApps.Start(Seconds(1.0));
m_firewallApps.Stop(Seconds(20.0));
}
void OrchestrationHelper::DeployLoadBalancer(NodeContainer nodes) {
// Implement load balancer deployment logic
// For example, install a load balancing application
UdpEchoServerHelper echoServer(11);
m_loadBalancerApps = echoServer.Install(nodes.Get(2));
m_loadBalancerApps.Start(Seconds(1.0));
m_loadBalancerApps.Stop(Seconds(20.0));
}
void OrchestrationHelper::ScaleService(NodeContainer nodes) {
// Implement scaling logic
// For example, add more instances of a service
UdpEchoServerHelper echoServer(12);
ApplicationContainer newApp = echoServer.Install(nodes.Get(3));
newApp.Start(Seconds(5.0));
newApp.Stop(Seconds(20.0));
}
void OrchestrationHelper::TerminateService(NodeContainer nodes) {
// Implement service termination logic
m_firewallApps.Stop(Seconds(10.0));
m_loadBalancerApps.Stop(Seconds(10.0));
}
} // namespace ns3
Update the Simulation Script: Integrate the orchestration logic into your main simulation script.
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “ns3/applications-module.h”
#include “orchestration-helper.h”
using namespace ns3;
NS_LOG_COMPONENT_DEFINE(“NetworkServiceOrchestrationExample”);
int main(int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse(argc, argv);
NodeContainer nodes;
nodes.Create(4);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute(“DataRate”, StringValue(“5Mbps”));
pointToPoint.SetChannelAttribute(“Delay”, StringValue(“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install(nodes.Get(0), nodes.Get(1));
devices.Add(pointToPoint.Install(nodes.Get(1), nodes.Get(2)));
devices.Add(pointToPoint.Install(nodes.Get(2), nodes.Get(3)));
InternetStackHelper stack;
stack.Install(nodes);
Ipv4AddressHelper address;
address.SetBase(“10.1.1.0”, “255.255.255.0”);
address.Assign(devices);
UdpEchoServerHelper echoServer(9);
ApplicationContainer serverApps = echoServer.Install(nodes.Get(3));
serverApps.Start(Seconds(1.0));
serverApps.Stop(Seconds(10.0));
UdpEchoClientHelper echoClient(address.GetAddress(3), 9);
echoClient.SetAttribute(“MaxPackets”, UintegerValue(10));
echoClient.SetAttribute(“Interval”, TimeValue(Seconds(1.0)));
echoClient.SetAttribute(“PacketSize”, UintegerValue(1024));
ApplicationContainer clientApps = echoClient.Install(nodes.Get(0));
clientApps.Start(Seconds(2.0));
clientApps.Stop(Seconds(10.0));
OrchestrationHelper orchestrationHelper;
orchestrationHelper.DeployFirewall(nodes);
orchestrationHelper.DeployLoadBalancer(nodes);
// Simulate scaling the service
Simulator::Schedule(Seconds(5.0), &OrchestrationHelper::ScaleService, &orchestrationHelper, nodes);
// Simulate terminating the service
Simulator::Schedule(Seconds(15.0), &OrchestrationHelper::TerminateService, &orchestrationHelper, nodes);
Simulator::Run();
Simulator::Destroy();
return 0;
}
Here, we had clearly discussed about how the network service orchestration can handle and manage the services in SDN and NFV scenarios that were executed using ns3 tool. If you need any other information regarding the network service orchestration we will support and provide it.
We are responsible for the implementation of Network Service Orchestration within the ns3 program, and we are here to assist you in utilizing this tool for your projects, covering relevant topics. Our experience includes work in Software-Defined Networking (SDN) and Network Function Virtualization (NFV).