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Emulating RIP(Routing information protocol) in GNS3

 RIP(Routing Information Protocol)

Being one of the Oldest distance vector routing protocols, RIP is based on the Bellman-ford algorithm. 
There are two versions of this protocol, which were published in 1998. We can find the complete documentation on internetsociety.org the file is located at RIP Official Documentation.

GNS3

Many professionals and students use Graphical Network Simulator to experiment with networking paradigms. we are using it to emulate the RIP routing algorithm.

Components

  • VPCs - 2
  • switch - 2
  • router(c7200) - 3

Topology


Topology constructed for this exercise 



Commands to set the IP address to interfaces in the router

config
interface <Interface_Name>
ip address <IP_addr> <Mask>
no shutdown


Commands used for initiating the RIP routing in a server are as follows

config
router rip
network <subnet1_network_addr>
network <subnet2_network_addr>

if all the commands are entered correctly we will see a result similar to the above diagram. here "R" in front of 10.0.0.0 represents the route found using the RIP protocol.


Nodes after assigning the IP address

Scenario analysis


Let only R1 and R3 routers be activated with the RIP routing. here we can now reach up to 192.168.2.2/24 and 192.168.1.2/24, beyond that the router R2 will not be having any knowledge of how to forward IPs between nodes around it. below ping results prove this.


once we activate the routing in Router R2, we will be able to reach the PC and another end of the network.


the Below Ping results confirm this


we can confirm the protocol that we are using by capturing the packets using the Wireshark tool. here we are using RIP version 1  we can use RIP version 2 by adding the command "version 2" during configuring RIP in the router. after the "router rip" command



Happy learning!!😊

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