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Configuring RIP Default Information Originate in Cisco

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Pre-requisites: RIP, Configuring RIP Versions 1 and 2 in Cisco.

After configuring one or multiple default routes on the routers in the routing protocol’s domain, the routing protocol (in our case Routing Information Protocol) can advertise default routes, and each router chooses the best default route to list as that router’s gateway of last resort.

RIP has built-in features which allow the router on which RIP is configured to originate and propagate a default route to its direct neighbors which will propagate throughout the entire RIP routing domain. RIP supports three out of four methods to configure default route propagation which is as follows: 


Supported by RIP or not 

Configuring static route to with the redistribute static command


Using the default information originate command


Using ip default-network command


Using summary routes


Configuring RIP Default Information to Originate:

Step 1: Create the 4 router topologies in GNS3 as shown in the image below:


Step 2: Configure the IPv4 address on the physical interface of the routers:

On R1:

R1(config)#int f0/0
R1(config-if)#ip address
R1(config-if)#no shutdown

On R2: 

R2(config)#int f0/0
R2(config-if)#ip address
R2(config-if)#no shutdown
R2(config-if)#int f1/0
R2(config-if)#ip address
R2(config-if)#no shutdown

On R3:

R3(config)#int f1/0
R3(config-if)#ip address
R3(config-if)#no shutdown
R3(config-if)#int f0/0
R3(config-if)#ip address
R3(config-if)#no shutdown

On R4:

R4(config)#int f0/0
R4(config-if)#ip address
R4(config-if)#no shutdown

Step 3: Enabling RIP on all routers using the router rip global configuration command :

R1(config)#router rip 
R2(config)#router rip 
R3(config)#router rip
R4(config)#router rip 

Step 4: Checking the IPv4 routing table on the routers for RIP route entry :

R1#show ip route


R2#show ip route


R3#show ip route


R4#show ip route


Step 5:  Configuring R1 to always originate and propagate a default route throughout the RIP routing domain:

R1(config)#router rip
information originate

Step 6: Verifying whether the default route is being propagated correctly by R1 or not by viewing the routing table of R2, R3, and R4 and looking for the entry of default route and gateway of last resort:

R2#show ip route


R3#show ip route


R4#show ip route


Step 7: Checking RIP database on all the routers:

R1#show ip rip database


R2#show ip rip database


R3#show ip rip database


R4#show ip rip database


Checking Connectivity:





Capturing Interface in GNS3 Using Wireshark:

To capture the interface in GNS3 :

  1. Make sure that Wireshark is installed on your PC.
  2. Hover over the interface you want to capture and right-click on the interface  
  3. A drop-down menu will appear with some options.
  4. Select the option that says “Start capture”.


RIP Advertisements :

Packets highlighted in red are RIPv1 advertisements:


RIPv1 advertisement (request message) packet format :


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Last Updated : 17 Dec, 2022
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