To simulate Routing Interface Protocols in OMNeT++ has needs to configure a network in which routers interact and trade-off routing information through different interfaces. Routing interface protocols usually contain dynamic routing protocols such as OSPF (Open Shortest Path First), BGP (Border Gateway Protocol), RIP (Routing Information Protocol), and similar ones that handle on how routers interchange information across network interfaces to control optimal paths.
Here’s how you can simulate routing interface protocols using OMNeT++ and the INET framework:
Steps to Simulate Routing Interface Protocol Projects in OMNeT++
- Install OMNeT++ and INET Framework
- Download OMNeT++: Download the latest version of OMNeT++.
- Install the INET Framework: INET is vital as it delivers prebuilt models for routers, protocols such as OSPF, BGP, and routing interfaces.
- Clone INET repository:
git clone https://github.com/inet-framework/inet.git
-
- Open OMNeT++ IDE, import the INET project, and build it by right-clicking on the INET project and choose Build Project.
- Understand Routing Interface Protocols
Common routing interface protocols that contain:
- OSPF (Open Shortest Path First): A link-state protocol that estimate the shortest path for routing.
- BGP (Border Gateway Protocol): A path-vector protocol utilized for routing among autonomous systems.
- RIP (Routing Information Protocol): A distance-vector protocol according to hop count.
- EIGRP (Enhanced Interior Gateway Routing Protocol): A hybrid protocol integrates the behavior of distance-vector and link-state.
Each protocol performs by interchanging routing information across router interfaces, enabling the network to dynamically adapt to topology changes.
- Set up the Network Topology Using NED
Describe the network topology in a NED file. The network will entail of routers and hosts linked over numerous interfaces.
Example NED File (RoutingNetwork.ned):
package routingprotocol;
import inet.node.inet.Router;
import inet.node.inet.StandardHost;
import inet.linklayer.ethernet.EthernetInterface;
import inet.networklayer.ipv4.Ipv4RoutingTable;
import inet.node.ospf.OspfRouter;
network RoutingNetwork
{
types:
channel fiberline extends ned.DatarateChannel {
datarate = 1Gbps;
}
channel wirelessline extends ned.DatarateChannel {
datarate = 100Mbps;
}
submodules:
router1: OspfRouter {
@display(“p=100,100”);
}
router2: OspfRouter {
@display(“p=200,100”);
}
router3: OspfRouter {
@display(“p=300,100”);
}
host1: StandardHost {
@display(“p=400,100”);
}
host2: StandardHost {
@display(“p=500,100”);
}
connections allowunconnected:
router1.ethg++ <–> fiberline <–> router2.ethg++;
router2.ethg++ <–> fiberline <–> router3.ethg++;
router3.ethg++ <–> fiberline <–> host1.ethg++;
router2.ethg++ <–> wirelessline <–> host2.ethg++;
}
Explanation:
- OspfRouter: INET delivers a ready-to-use OSPF router model, however we can replace it with any other routing protocols such as RIP or BGP.
- StandardHost: Represents client nodes.
- fiberline and wirelessline: Describe the communication medium among nodes.
- Connections: Routers are associated across different kinds of links (wired and wireless).
- Configure Routing Protocol Parameters in omnetpp.ini
The omnetpp.ini file regulates the simulation configuration. We will configure protocol-specific metrics and routing interface configurations here.
Example omnetpp.ini Configuration:
network = RoutingNetwork
sim-time-limit = 100s
# Configure IP addresses
**.router1.typename = “OspfRouter”
**.router1.ipv4.routingTable.typename = “Ipv4RoutingTable”
**.router1.interfaces[*].ipv4.address = “10.0.0.1”
**.router1.interfaces[*].ipv4.netmask = “255.255.255.0”
**.router2.typename = “OspfRouter”
**.router2.ipv4.routingTable.typename = “Ipv4RoutingTable”
**.router2.interfaces[*].ipv4.address = “10.0.0.2”
**.router2.interfaces[*].ipv4.netmask = “255.255.255.0”
**.router3.typename = “OspfRouter”
**.router3.ipv4.routingTable.typename = “Ipv4RoutingTable”
**.router3.interfaces[*].ipv4.address = “10.0.0.3”
**.router3.interfaces[*].ipv4.netmask = “255.255.255.0”
# Enable OSPF Routing Protocol
*.router1.hasOspf = true
*.router2.hasOspf = true
*.router3.hasOspf = true
# Set OSPF parameters
*.router1.ospfRouter.routerID = “1.1.1.1”
*.router2.ospfRouter.routerID = “2.2.2.2”
*.router3.ospfRouter.routerID = “3.3.3.3”
# Application layer
*.host1.numApps = 1
*.host1.app[0].typename = “UdpBasicApp”
*.host1.app[0].destAddresses = “10.0.0.3”
*.host1.app[0].destPort = 5000
*.host1.app[0].messageLength = 1024B
*.host1.app[0].sendInterval = exponential(1s)
*.host2.numApps = 1
*.host2.app[0].typename = “UdpSink”
*.host2.app[0].localPort = 5000
Explanation:
- IP Addresses and Routing Table Configuration: Describes IP addresses and netmasks for the router interfaces.
- OSPF Setup: Allow OSPF routing on the routers and configure OSPF-specific parameters like the router ID.
- UDP Application Layer: Host1 transmit traffic to Host2 using the UDP protocol, enabling us to track on how the routing protocols manage the traffic.
- Implement the Routing Interface Protocol
Liable on the routing interface protocol that need to simulate, we need to adapt the configuration or establish a custom model:
For OSPF (Open Shortest Path First):
- Make sure that OspfRouter is set as the router type.
- OSPF will spontaneously estimate the shortest paths and update routing tables in terms of link-state advertisements (LSAs) exchanged among routers.
For BGP (Border Gateway Protocol):
- Replace OspfRouter with BgpRouter in the NED file and configure the bgpRoutingTable in omnetpp.ini.
- Example of enabling BGP:
*.router1.bgpRoutingTable.routerId = “1.1.1.1”
*.router2.bgpRoutingTable.routerId = “2.2.2.2”
*.router3.bgpRoutingTable.routerId = “3.3.3.3”
*.router1.bgpRoutingTable.peers = “10.0.0.2”
*.router2.bgpRoutingTable.peers = “10.0.0.3”
Here, BGP routers interchange routing information among peers through different autonomous systems.
For RIP (Routing Information Protocol):
- Utilize RipRouter and set up RIP-specific parameters such as hop count and update intervals.
*.router1.hasRip = true
*.router2.hasRip = true
*.router3.hasRip = true
- Routing Interface Configuration: Set up multiple interfaces with diverse link types (e.g., Ethernet, wireless), and describe how RIP routes packets in terms of hop counts.
- Run the Simulation
- Build the Project:
- Right-click on the project in the OMNeT++ IDE.
- Choose Build Project to compile simulation.
- Run the Simulation:
- Right-click on omnetpp.ini and choose Run As > OMNeT++ Simulation.
- The simulation will initiate in OMNeT++’s graphical interface (Qtenv), in which we can monitor packet transmissions, routing table updates, and network behaviour.
- Analyse the Results
- Logging and Output:
- OMNeT++ deliver detailed logs about how routing protocols update routing tables and manage packets.
- We can view packet interchanges among routers, like OSPF LSAs or BGP update messages.
- Routing Table Analysis:
- Validate how routing tables are updated in real-time as routers interchange the protocol messages.
- For instance, we can examine OSPF’s SPF (Shortest Path First) calculations or BGP’s route selection according to attributes such as AS path and next-hop.
- Performance Metrics:
- OMNeT++ creates scalar and vector output files that can be measured to the performance of the routing protocols (such as convergence time, packet loss, delays).
- Utilize the Analysis Tool in OMNeT++ IDE to generate graphs and measure parameters such as throughput, delay, hop count.
- Extend the Simulation
- Multiple Protocols:
- Replicate hybrid environment in which different routing protocols (such as OSPF in one section, BGP in another) are utilized through different segments of the network.
- Multiple Interfaces:
- Set up multiple interfaces (such as Ethernet, wireless, LTE) for each router and replicate routing decisions through heterogeneous networks.
- Advanced Traffic:
- Establish diverse traffic types (TCP, UDP, ICMP) and measure on how routing protocols manage these different traffic patterns.
- Link Failures:
- Replicate link failures and monitor how the routing protocol reacts (such as OSPF recalculating paths, BGP withdrawing routes).
These project ideas concentrate on simulating and discovering Routing Interface Protocols in network environments and related its performance with Routing Interface Protocols using OMNeT++. Additional specific details regarding the Routing Interface Protocols will be provided according to your needs.
Our developers are available to conduct network evaluations for your projects. For simulating Routing Interface Protocol projects using the OMNeT++ tool, we offer top-notch tools and resources to ensure timely completion of your work. Collaborate with us to receive expert guidance on protocols including OSPF (Open Shortest Path First), BGP (Border Gateway Protocol), and RIP (Routing Information Protocol). Please submit all your research needs to phdprime.com, and we will provide you with prompt assistance.
