ISP Network Simulation using RIP v2

Objective

Simulate a small ISP-style network connecting multiple branch routers using RIP version 2 for dynamic routing and a DHCP server for automatic IP assignment to LAN clients.

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Topology Summary

• 4 routers (R0–R3) in a ring topology (serial links)
• 4 switches (one per LAN)
• 4 PCs (one per LAN)
• 1 DHCP server on R0 LAN
• Routing protocol: RIP v2 (dynamic routing)

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IP Address Plan

LAN Networks

Router	LAN Network	Interface	IP Address
R0	192.168.1.0/24	Fa0/0	192.168.1.1
R1	192.168.2.0/24	Fa0/0	192.168.2.1
R2	192.168.3.0/24	Fa0/0	192.168.3.1
R3	192.168.4.0/24	Fa0/0	192.168.4.1

Serial Links (WAN)

Link	Network	Router A	Router B
R0 ↔ R1	10.0.0.0/30	10.0.0.1	10.0.0.2
R1 ↔ R2	10.0.0.4/30	10.0.0.5	10.0.0.6
R2 ↔ R3	10.0.0.8/30	10.0.0.9	10.0.0.10
R3 ↔ R0	10.0.0.12/30	10.0.0.13	10.0.0.14

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Router Configuration

Example: R0

enable
configure terminal

interface fastethernet0/0
 ip address 192.168.1.1 255.255.255.0
 no shutdown

interface serial0/3/0
 ip address 10.0.0.1 255.255.255.252
 clock rate 64000
 no shutdown

interface serial0/3/1
 ip address 10.0.0.14 255.255.255.252
 no shutdown

router rip
 version 2
 no auto-summary
 network 192.168.1.0
 network 10.0.0.0

end
write

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DHCP Configuration (R0)

Field	Value
Server IP	192.168.1.2
Default Gateway	192.168.1.1
DNS Server	8.8.8.8
Start IP Address	192.168.1.10
Subnet Mask	255.255.255.0
Max Users	20
DHCP Service	ON
Pool Name	lan1

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Verification

Commands

Command	Purpose
show ip route	Verify routing table and RIP-learned routes
show ip protocols	Confirm RIP v2 is active
show ip interface brief	Check interface status
ping <ip>	Test connectivity between LANs

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Results

• All routers exchanged routes dynamically using RIP v2
• DHCP server assigned IPs automatically to LAN clients
• PCs successfully communicated across all LANs with 0% packet loss

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Screenshots

File	Description
topology.png	Full network layout
show-ip-route.png	Routing table output showing RIP routes
show-ip-protocols-r0.png	RIP configuration verification on R0
show-ip-protocols-r1.png	RIP configuration verification on R1
show-ip-protocols-r2.png	RIP configuration verification on R2
show-ip-protocols-r3.png	RIP configuration verification on R3
pc0-pings.png	Successful ping from PC0 to other LANs
dhcp_pool.png	DHCP pool configuration on R0
dhcp_client.png	PC0 showing DHCP-assigned IP

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How to Open This Project

1. Download or clone this repository
2. Open Cisco Packet Tracer
3. Go to File → Open
4. Navigate to this folder and open isp-network-sim-ripv2.pkt

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Files

Name	Description
isp-network-sim-ripv2.pkt	Main Packet Tracer project file
/router-configs/	Router running-configs (R0–R3)
/screenshots/	Topology and test verification images
README.md	Project documentation

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About

Demonstrates dynamic routing and automated IP management in a small ISP level topology using RIP v2 and DHCP

It can be extended with OSPF, BGP or monitoring servers for scalability.

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Author

Anvitha Bhat A
isp-network-sim-ripv2 | 2025

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License

This project is open source and available under the MIT License.

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Contributing

Contributions, issues, and feature requests are welcome!
Feel free to check the issues page.

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Acknowledgments

• Cisco Packet Tracer for network simulation
• RIP v2 protocol documentation
• ISP network design best practices