Configuration Of RIP Routing Protocol With Routers

How to configure a rip routing protocol with a simple topology to check the connectivity between hosts.


Step 1:Create a topology like this and do basic configurations IP address to the router interfaces ,ip address and default gateway to the host same as in topology.

                   

In Router R1,
R1(config)#interface fastethernet 2/0
R1(config-if)#ip address 10.0.0.1 255.0.0.0
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#interface serial 1/0
R1(config-if)#ip address 20.0.0.1 255.0.0.0
R1(config-if)#clock rate 64000
R1(config-if)#encapsulation ppp
R1(config-if)#no shutdown
R1(config-if)#exit

In Router R2,
R2(config)#interface serial 1/0
R2(config-if)#ip address 20.0.0.2 255.0.0.0
R2(config-if)#encapsulation ppp
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface fastethernet2/0
R2(config-if)#ip address 30.0.0.1 255.0.0.0
R2(config-if)#no shutdown
R2(config-if)#exit
By default routers know directly connected network.

Step 2:Check the routing table of  the router R1 and R2 by giving the command show ip route in privileged mode,
In Router R1,
R1#show ip route
Gateway of last resort is not set
C    10.0.0.0/8 is directly connected, FastEthernet2/0
C    20.0.0.0/8 is directly connected, Serial1/0
In Router R2,
R1#show ip route
Gateway of last resort is not set

C    30.0.0.0/8 is directly connected, FastEthernet2/0
C    20.0.0.0/8 is directly connected, Serial1/0

Step 3:Now,Run Rip protocols on R1 and R2 .What rip will do is, it will create a routing update by adding directly connected networks information and it will send to neighbor routers
Just add directly connected networks
In Router R1,
R1(config)#router rip
R1(config-router)#network 10.0.0.0
R1(config-router)#network 20.0.0.0
R1(config-router)#exit
In Router R2,
R2(config)#router rip
R2(config-router)#network 20.0.0.0
R2(config-router)#network 30.0.0.0
R2(config-router)#exit
Now routers learns network information automatically through routing updates

Step 4:Now give show ip route command in R1 and R2 and check the routing table
In Router R1,
R1#show ip route
Gateway of last resort is not set
C    10.0.0.0/8 is directly connected, FastEthernet0/0
C    20.0.0.0/8 is directly connected, Serial2/0
R    30.0.0.0/8 [120/1] via 20.0.0.2, 00:00:28, Serial2/0
R1#
Here,network 30.0.0.0 learned by the router R1 via Serial 2/0 by routing update from R2,that will be reachable via 20.0.0.2(next hop).
[120/1]-120 Administrative distance of Rip,1-Reachable on one hop.

In Router R2,
R2#show ip route
Gateway of last resort is not set
R    10.0.0.0/8 [120/1] via 20.0.0.1, 00:00:16, Serial2/0
C    20.0.0.0/8 is directly connected, Serial2/0
C    30.0.0.0/8 is directly connected, FastEthernet0/0

Here,network 30.0.0.0 learned by the router R2 via Serial 2/0 by routing update from R1,that will be reachable via 20.0.0.1(next hop).

Step 5:Now ping from the Host 10.0.0.10 to Host 30.0.0.10 by giving command
ping 30.0.0.10 you will get,

RIP Timers:
Update Interval-30
Invalid Interval -180
Hold Down Interval -180
Flush After-240
Administrative Distance-120