Custom Network Protocol on Modified Ring Topology

Team: Radical

Leader: Dallas Edwards Members: Sam Sieg

Sani Musayev Changyong Jung

Introduction

• Modified ring topology

• Linux based chat system

• Rewrite/Build Custom OSI-Model

• Network Monitoring tools

• File transfer system

Motivation

• CUSTOM RING TOPOLOGY:-Five machines in a ring topology-Every node can act as a

bridge/router or carry out its own functions as a single entity.

• OSI Model:-Modulization-Standard implementation model

Custom Ring Topology

C1: 4 NICs, 4 connections, a gateway to other subnets

B1, A1, A2, B2: 2 NICs, 2 connections

Limitations

• Not scalable beyond 25 hosts• Linux based system only• No encryption in Presentation

layer

Method• Connection to Physical Medium:

- Discovery System (Remote-Hosts)

• Network Stack:- Discovery of hardware on a local host

• Routing algorithms- Vector distance routing algorithms- Packet forwarding

• Flow Control- Throttling- Drop rate analysis

• Dataflow multiplexing: - Pipelining dataflow into Programs- Management of multiple Program data flows

Results

• Ability to send/receive Ethernet packets• Communication among all layers• Working chat application• File transfer capability• Each layer is autonomous and

independent

Conclusion

• Whole OSI network model is successfully re-built as our own

• Each layer works independently and can communicate properly

• The Chat application is working in our network stack environment

• Above our own network model, the ring topology is successfully constructed.

• For the future, advanced network stack might be needed to support multi-platform environment

References[1] Douglas E. Comer, Internetworking with TCP/IP, pp 95 – 173, 2000.

Prentice Hall[2] RFC2003: IP Encapsulation within IP, http://portal.acm.org/citation.cfm?id=RFC2003[3] Richard Stevens, Unix Network Programming, pp 85 – 110, pp 655 –

70, pp 703 – 726, 1998. Prentice Hall[4] Kay A. Robbins & Steven Robbins, Practical UNIX Programming,

pp333 – 400, 1996. Prentice Hall. [5] Andreas Schaufler, RAW Ethernet vs. UDP,

http://www.landshut.org/bnla01/members/Faustus/fh/linux/udp_vs_raw/index.html

[6] Chae Y. Lee & Seok J. Koh, A design of minimum cost ring-chain network with dual-homing survivability: A tabu search approach, Computers & Operations Research, Volume 24, Issue 9, September 1997, pp 883-897

[7] Brian "Beej" Hall, Beej's Guide to Unix Interprocess Communication,http://beej.us/guide/ipc/

[8] Pradeep Padala, NCURSES Programming HOWTO,http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/

Experiments…