Routing Information Protocol

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In this tutorial, we will set up and configure Routing Information Protocol (RIP) in GNS3. The objective is to establish dynamic routing between routers and a virtual private cloud (VPC1) using RIP.

Step 1: Understanding the Network Topology

Our network consists of:

• Router R1 (Connected to R2 via Serial 1/0)

• Router R2 (Connected to R1 via Serial 1/0 and to VPC1 via FastEthernet 0/0)

• VPC1 (Simulating a client machine, connected to R2 via FastEthernet 0/0)

Device	Interface	Address	Subnet Mask
R1	Serial 3/0	192.168.1.1	255.255.255.0
R2	Serial 3/0	192.168.1.2	255.255.255.0
R2	FastEthernet 0/0	172.16.1.1	255.255.0.0
VPC1	Virtual Interface	172.16.1.100	255.255.0.0

Toplogy

Step 2: Configuring Router R1

R1#configure terminal
R1(config)#interface serial 3/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#router rip
R1(config-router)#network 192.168.1.0

Step 3: Configuring Router R2

R2#configure terminal
R2(config)#interface serial 3/0
R2(config-if)#ip address 192.168.1.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface fastEthernet 0/0
R2(config-if)#ip address 172.16.1.1 255.255.0.0
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config-router)#network 192.168.1.0
R2(config-router)#network 172.16.0.0

Step 4: Configuring VPC1 (Client Machine)

PC1> ip 172.16.1.100/16 172.16.1.1
Checking for duplicate address...
PC1 : 172.16.1.100 255.255.0.0 gateway 172.16.1.1

PC1> show ip

NAME        : PC1[1]
IP/MASK     : 172.16.1.100/16
GATEWAY     : 172.16.1.1
DNS         :
MAC         : 00:50:79:66:68:01
LPORT       : 20010
RHOST:PORT  : 127.0.0.1:20011
MTU         : 1500

PC1>

Step 5: Verify connectivity with a ping test

PC1> ping 172.16.1.1

84 bytes from 172.16.1.1 icmp_seq=1 ttl=255 time=30.814 ms
84 bytes from 172.16.1.1 icmp_seq=2 ttl=255 time=8.786 ms
^C
PC1> ping 192.168.1.2

84 bytes from 192.168.1.2 icmp_seq=1 ttl=255 time=9.390 ms
84 bytes from 192.168.1.2 icmp_seq=2 ttl=255 time=8.624 ms
^C
PC1> ping 192.168.1.1

84 bytes from 192.168.1.1 icmp_seq=1 ttl=254 time=31.406 ms
84 bytes from 192.168.1.1 icmp_seq=2 ttl=254 time=27.448 ms
^C
PC1>

Step 6: Capture RIP packets using Wireshark

Apply a filter:

rip

Verify that RIP advertisements are being broadcast correctly.

Step 7: Understanding RIP

Key Features of RIP:

• Distance-vector routing protocol

• Uses hop count as a metric (max 15 hops)

• Broadcasts routing table every 30 seconds

• Uses UDP port 520

• Administrative distance: 120

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Keywords

RIP, Routing Information Protocol, GNS3, dynamic routing, router configuration, IP addressing, subnet mask, hop count, distance-vector, routing table, serial interface, FastEthernet, VPC1, network topology, debug ip rip, show ip route, routing updates, UDP port 520, administrative distance, RIP packets, وایرشارک, nerd cafe , نرد کافه

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