KumuhNet:IntraNet & Internet Technology for Indonesian Education Network

Computer Network Research GroupInstitute of Technology Bandungcnrg@itb.ac.idhttp://xxx.itb.ac.id/~cnrg/

Focus

Existing Implemented Infrastructure.Technology Implemented to Support

Distance Learning.

Our situation

Develop by UniversityImplemented & Run by Education

SectorFor Indonesia ….

Outline

Current Infrastructure.Brief overview on our research

results in: physical layer. Network layer. Application layer.

Internet Exchange

Indonesia ExchangeEthernet

To Japan 1.55Mbps2MbpsIX Telkom

VSAT TDMA128/64Kbps

cache cache router

routerAccess Server

ITBNetwork

router

Jakarta - 4MbpsMalang - 128KbpsSurabaya - 128Kbps

TerrestrialNetwork

VSAT SCPC19.2-64K

JCSAT-3

Palapa C1

CDMA2Mbps

AX.25Packet Radio

Internet Exchange

Indonesia ExchangeEthernet

To Japan 1.55Mbps2MbpsIX Telkom

VSAT TDMA128/64Kbps

cache cache router

routerAccess Server

ITBNetwork

router

Jakarta - 4MbpsMalang - 128KbpsSurabaya - 128Kbps

TerrestrialNetwork

VSAT SCPC19.2-64K

JCSAT-3

Palapa C1

CDMA2Mbps

AX.25Packet Radio

Connection toIIX via RadNet

7 Universities viaVSAT TDMA

SCPCConnect 3 Universities

Connect to 6 Universities

5 Universities / Research Inst

> 10 educational institutions

Results in Physical Layer

Homebrew 2Mbps CDMA.VSAT TDMA vs. SCPC Network.Low Cost Access for Schools.Internet Access for Amateur Radio

VSAT TDMA vs. SCPC

VSAT TDMA 128Kbps OutboundVSAT TDMA 64Kbps InboundVSAT TDMA is not suitable for Internet

application (especially Web).Tune TDM for 40 byte (originally

256byte packet).Migrating to VSAT SCPC 19.2Kbps at

least.

Homebrew 2Mbps CDMA

Uses Lucent CDMA 2Mbps card 915MHz 250mW.

Run on FreeBSD.Homebrew antenna (cost ~US$150).Max. distance 15km (use PA for

more).Most of our high speed MAN using this

technology.

Consequences CDMA2Mbps

bypassing local line.

We promote diffierent alternative for building high speed network.

Homebrew 64-256Kbps packet radio

We are prototyping 64-256Kbps packet radio network in the lab by adnan@itb.ac.id.

AX.25 link layer protocol is used.GMSK MX 589 one chip modem is used.We drive the modem via parallel port.MMIC Minicircuit is being build for

transverter.

Low Cost Packet Radio

Bandung-Net (for Education & Research)AMPR-Net (for Amateur Radio)

Jakarta (EN), VHF/UHF, 1200 bps, 9600 bps. Bandung (ITB), VHF, 1200 bps. Surakarta (YB2SV), VHF, 1200 bps. Malang (UMM), VHF, 1200 bps. Indonesia (ITB), HF, 1200 bps.

Low Cost Access for Schools

AX.25 1200bps Packet Radio Network.

Proxy Server.Dial on Demand for Web &

Interactive Internet Access.

IntraNetLAN

Proxy &Dial on Demand

Radio AX.25Packet Radio Gateway

AX.25Network

InterNetIntraNet

LANProxy &

Dial on Demand

Radio AX.25Packet Radio Gateway

AX.25Network

InterNet

Bandung-Net

ITB GATEWAYDOS & NOS

Internet

Radio Tower

PT. TELNICLEN

BATANSTT TELKOM

LPKIGITA

UNPARETC.

1200 bps / VHFelektronik mail

Not less than 50 emails/day

(from Internet to Bandung-Net)

Amateur Radio Network

JakartaBandungMalang

AMPR.ORG NET

ITB AMPR GATEWAY(LINUX)

INTERNET

WORLD WIDEAMPR.ORG

VHF (Bandung)1200 bps

HF (Nasional)1200 bps

BANDUNG VHFAMPR.ORG

YB-NETAMPR.ORG

EN(DOS/NOS)

JAKUT VHF1200 bpsJAKUT UHF

9600 bps

SALATIGA(DOS/NOS)

SALATIGA VHF1200 bps

UMM(DOS/NOS)

MALANG VHF1200 bps

ITB GATEWAY

ELEKTRINDO NUSANTARA

UNIV. MUHAMMADIYAHMALANGYB2SV (JOS SOEJOSO)SALATIGA

Application Layer

TCP

AMPRNet IP (44.x.x.x)

InterNet IP

Link Layer (AX.25)

Physical Layer

Results in Network Layer

Network Monitoring by ismail@cnrg.itb.ac.id.

Monitor at http://netmon.itb.ac.id/ Network Map Sample of traffic by protocol, port, etc. Graph of total traffic.

Migration to OSPF for internal routing.

Traffic Distribution Grapher

Describes:Comparison between Inbound and Outbound

TrafficTraffic Distribution by ProtocolsThe Most Active Routers/Hosts by ProtocolsDaily Usage Trend for some ProtocolsWeekly Protocol Usage Trend

TDG

Protokol

HostIn vs Out

Trend

URL: http://netmon.itb.ac.id/

In vs Out

Protokol

Host

Trend

Benefits:

Behaviour of the users in ITB (AI3): Subjects of interest Sites to be visited The rush hours Most actives computer/host

Planning the traffic routing, firewalling, etc.

NETWORK MONITORING

“Scotty & Map-Generator”

Scotty monitor

Connectivitymonitoring

Interface utilitymonitoring

Scotty monitor

Web screen

Web screen

http://netmon.itb.ac.id/map.html

Text Map

Timeout alarm

E-mail to Administrator

Web screen

Interface UtilityReport

http://netmon.itb.ac.id/map.html

Results:

Reconfiguration of VSAT TDMA interface speed for better performance.

Monitoring the JAMUS (ITB-YWCN) link performance. To Lembong: 99.525 % To Surabaya: 85.523 % To Malang: 86.282 %

System Platform:

Pentium 10016 MB RAM2,1 GB Hard diskOperating System: FreeBSDMain Software: Scotty/Tkined

(FreeWare) and TCPDUMP.Under Xfree86 Windows

Results in Application Layer

Mailing ListsEnglish Technical Writting Course

distance learning test bed.Cache & Cache Monitoring.MPEG-3 Test Bed.RealPublisher & NetShow test bed.

Cache

ITB has set several Parents cache.Cache person is husni@itb.ac.idWe cache all of our Web traffic.check out

http://www.lp.itb.ac.id/~cacher/

HTTP-Cache: What

Use of Proxy ServerPreviously fetched WWW objects are

stored in Proxy ServerProxy Server gives cached WWW

object instead of fetches it from WWW server

Use of non-persistent caching

HTTP-Cache: Why

Web is the most popular application on The Net

Web traffic in byte is about 40%WAN link get congestedMost WWW objects are static

HTTP-Cache: Facts

HTTP-Cache reduces WAN trafficMore Effective than Server

mirror

Cache Hierarchy

Cache-Server meshCollaborates using “parent-sibling”

relationshipSibling: fetches WWW-object only if it

is found in local cacheParent: always fetches requested

WWW-object

Cache Hierarchy at ITB Network

cache-naist1.ai3.net

ns1.itb.ac.id

ns2.itb.ac.id

cache.lib.itb.ac.id cache-en.itb.ac.id

bandung-net

VSAT-net

sibling relationship

parent relationship

Cache Usage Monitoring

Log filesDaily statisticsWeb-based report

Cache stats: ns1.itb.ac.id

Cache stats: ns2.itb.ac.id

Cache stats: cache-en.itb.ac.id

Cache stats: cache.lib.itb.ac.id

Results

Over 1.5Gbytes transferred data at a normal work-day

Over 400Mbytes transferred data at a weekend-day

Reduces upto 19% in HTTP traffic

Mailing Lists

Uses majordomo on FreeBSDRun on Dual Pentium 166MHz 32Mb

RAM.More than 220 mailing lists at ITB. (more

than 75% Indonesian mailing lists).More than 10.000 subscribers.We are trying to build the community in

Indonesia.

Distance Learning

ITB’s Server:http://distance-courses.itb.ac.id/http://virtual-university.itb.ac.id/

Video Conference

25 October 1997: 14:00 Indonesia Time.Three Cities: Bandung-Surabaya-MalangCU-SeeMe & Its Reflector.Aiming for high school network in

Indonesia.July 1997: Panel Discussion on the

future of higher education (UNU).

Video on Demand

Supported by Microsoft & Progressive Network.

Splitter for UNFCC COP3 December 1997.

Publisher for “Kongres Ikatan Alumni ITB” December 1997.

Summary

ITB has managed to integrate more than 20 educational institutions to Internet.

Major IT used: 2Mbps CDMA Network. Web based distance learning. Real Publisher / Microsoft NetShow.

Key to success:Mass Qualified Human Resource