To simulate Multicast Routing using OMNeT++, which encompasses making a network in which data is transmitted from one or more sources to several destinations utilizing multicast routing protocols. In multicast routing, packets are provided only once along delivered network paths and are simulated only in which essential, minimizing network overhead compared to unicast or broadcast.
The simulation platform OMNeT++ along with the INET framework supports numerous multicast routing protocols, like PIM (Protocol Independent Multicast), DVMRP (Distance Vector Multicast Routing Protocol), and MOSPF (Multicast OSPF).
The following is a step-by-step procedure to simulate Multicast Routing projects in OMNeT++ using the INET framework:
Steps to Simulate Multicast Routing Projects in OMNeT++
Step 1: Install OMNeT++ and INET Framework
Make certain that OMNeT++ and the INET framework are installed, as INET offers support for IP-based multicast routing.
- Download OMNeT++: OMNeT++ official website
- Download INET Framework: INET Framework
Step 2: Define the Network Topology in the NED File
We require to describe a network with multicast sources and receivers, in addition to routers, which support multicast routing. The .ned file defines the physical layout of the network.
Here’s an instance NED file for a network, which supports multicast:
network MulticastNetwork
{
submodules:
sourceHost: StandardHost {
@display(“p=100,200”);
}
receiver1: StandardHost {
@display(“p=500,100”);
}
receiver2: StandardHost {
@display(“p=500,300”);
}
router1: Router {
@display(“p=200,200”);
}
router2: Router {
@display(“p=350,200”);
}
connections:
sourceHost.ethg++ <–> Eth100M <–> router1.ethg++;
router1.ethg++ <–> Eth100M <–> router2.ethg++;
router2.ethg++ <–> Eth100M <–> receiver1.ethg++;
router2.ethg++ <–> Eth100M <–> receiver2.ethg++;
}
In this topology:
- sourceHost is the multicast source that transmits data.
- receiver1 and receiver2 are the multicast receivers.
- router1 and router2 will manage multicast routing.
Step 3: Enable Multicast Routing in the INET Framework
The INET framework supports numerous multicast routing protocols, like DVMRP, PIM, and MOSPF. We can choose the proper protocol relying on the simulation goals.
Step 3.1: Assign IP Addresses and Enable Multicast on Interfaces
Initially, allocate an IP addresses to all nodes and routers and permit multicast on the interfaces in the omnetpp.ini file.
[Config MulticastRoutingSimulation]
network = MulticastNetwork
sim-time-limit = 100s
# Assign IPv4 addresses to hosts and routers
*.sourceHost.ipv4.config = “manual”
*.sourceHost.ipv4.addresses = “10.0.0.1/24”
*.receiver1.ipv4.config = “manual”
*.receiver1.ipv4.addresses = “10.0.2.1/24”
*.receiver2.ipv4.config = “manual”
*.receiver2.ipv4.addresses = “10.0.3.1/24”
*.router1.ipv4.config = “manual”
*.router1.ipv4.addresses = “10.0.0.254/24 10.0.1.1/24”
*.router2.ipv4.config = “manual”
*.router2.ipv4.addresses = “10.0.1.254/24 10.0.2.254/24 10.0.3.254/24”
# Enable multicast on router interfaces
*.router1.interfaceTable[0].multicastForwarding = true
*.router1.interfaceTable[1].multicastForwarding = true
*.router2.interfaceTable[0].multicastForwarding = true
*.router2.interfaceTable[1].multicastForwarding = true
*.router2.interfaceTable[2].multicastForwarding = true
In this configuration:
- Each node and router is allocated a unique IP address.
- Multicast forwarding is allowed on all router interfaces to support multicast traffic.
Step 3.2: Enable a Multicast Routing Protocol
Then, allow a multicast routing protocol like PIM (Protocol Independent Multicast) or DVMRP on the routers.
For example, to enable DVMRP:
# Enable DVMRP on routers
*.router1.hasDvmrp = true
*.router2.hasDvmrp = true
# Enable logging for DVMRP (optional)
*.router1.routingTable.dvmrpDebug = true
*.router2.routingTable.dvmrpDebug = true
Alternatively, to enable PIM:
# Enable PIM on routers
*.router1.hasPim = true
*.router2.hasPim = true
# Configure PIM interfaces
*.router1.interfaceTable[0].pimInterface = true
*.router1.interfaceTable[1].pimInterface = true
*.router2.interfaceTable[0].pimInterface = true
*.router2.interfaceTable[1].pimInterface = true
*.router2.interfaceTable[2].pimInterface = true
We can be permitted the routing protocol of the choice based on the project requirements.
Step 4: Configure Multicast Groups and Traffic Generation
Set up the multicast group addresses and replicate multicast traffic from the source to the receivers.
# Configure the multicast group (e.g., 224.0.0.1)
*.sourceHost.numApps = 1
*.sourceHost.app[0].typename = “UdpBasicApp”
*.sourceHost.app[0].localAddress = “10.0.0.1”
*.sourceHost.app[0].localPort = 5000
*.sourceHost.app[0].destAddresses = “224.0.0.1” # Multicast group address
*.sourceHost.app[0].destPort = 5000
*.sourceHost.app[0].messageLength = 512B
*.sourceHost.app[0].sendInterval = 1s
# Configure receivers to join the multicast group
*.receiver1.numApps = 1
*.receiver1.app[0].typename = “UdpSinkApp”
*.receiver1.app[0].localAddress = “224.0.0.1” # Multicast group address
*.receiver1.app[0].localPort = 5000
*.receiver2.numApps = 1
*.receiver2.app[0].typename = “UdpSinkApp”
*.receiver2.app[0].localAddress = “224.0.0.1” # Multicast group address
*.receiver2.app[0].localPort = 5000
In this configuration:
- sourceHost transmits multicast traffic to the multicast group 224.0.0.1.
- receiver1 and receiver2 join the multicast group and are set up to receive traffic from the group.
Step 5: Run the Simulation
When the network topology, multicast group, and traffic generation are set up:
- Build and compile the project in OMNeT++.
- Run the simulation using the OMNeT++ GUI or command line.
- Observe multicast routing behavior: Utilize the OMNeT++ GUI to envision how multicast packets are routed from the origin to the receivers via the routers.
Step 6: Analyze Simulation Results
The simulation environment OMNeT++ generates .sca and .vec files that encompassing simulation results. We can examine numerous multicast-specific performance parameters:
- Multicast Group Management: Verify how the receivers are join and leave multicast groups.
- Network Bandwidth Efficiency: Compare multicast traffic efficiency to unicast or broadcast traffic.
- Packet Delivery Ratio: Calculate the ratio of packets effectively delivered to all multicast group members.
- Multicast Tree Formation: Envision how routers build and conserve multicast distribution trees.
We can utilize OMNeT++’s built-in tools to envision the outcomes and investigate network performance.
Step 7: Extend the Simulation
We can expand the multicast routing simulation by inserting furthered aspects or distinct scenarios:
7.1: Test with Multiple Multicast Groups
Set up several multicast groups to mimic more complex scenarios in which numerous groups operate concurrently.
# Source sends traffic to multiple multicast groups
*.sourceHost.app[0].destAddresses = “224.0.0.1, 224.0.0.2”
7.2: Simulate Multicast with Mobile Nodes
In scenarios like ad-hoc networks, we can be mimicked multicast routing with mobile nodes using MANET multicast routing protocols such as ODMRP (On-Demand Multicast Routing Protocol).
7.3: Simulate Multicast Failures
Launch link or node failures within the network and monitor how multicast routing protocols retrieve and reroute traffic.
# Simulate a link failure at 50 seconds
*.router1.interfaceTable[1].downAt = 50s
7.4: Analyze Multicast Tree Efficiency
Utilize the simulation to observe the efficiency of multicast trees built by protocols such as PIM and DVMRP, and examine the bandwidth savings compared to unicast or broadcast techniques.
Step 8: Visualize Multicast Routing in OMNeT++
OMNeT++ offers visualization tools, which permit to animate the packet flow and multicast tree formation. It is especially helpful for knowing how multicast packets propagate via the network and are simulated at routers.
These projects encompasses simple steps to simulate, analyse, and visualize the Multicast Routing Projects using OMNeT++ tool. If you request more details regarding to this projects, we will be shared.
phdprime.com guarantee timely delivery of all our services, along with detailed explanations. Our team is here to assist you with simulations for your Multicast Routing Projects using OMNeT++. You can look forward to impressive simulations and innovative research concepts from us. Additionally, we can design custom projects tailored specifically to your needs. You’ll receive guidance on various multicast routing protocols, including PIM (Protocol Independent Multicast), DVMRP (Distance Vector Multicast Routing Protocol), and MOSPF (Multicast OSPF).
