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KumuhNet: IntraNet & Internet Technology for Indonesian Education Network Computer Network Research Group Institute of Technology Bandung

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Presentation on theme: "KumuhNet: IntraNet & Internet Technology for Indonesian Education Network Computer Network Research Group Institute of Technology Bandung"— Presentation transcript:

1 KumuhNet: IntraNet & Internet Technology for Indonesian Education Network Computer Network Research Group Institute of Technology Bandung

2 Focus zExisting Implemented Infrastructure. zTechnology Implemented to Support Distance Learning.

3 Our situation zDevelop by University zImplemented & Run by Education Sector zFor Indonesia ….

4 Outline zCurrent Infrastructure. zBrief overview on our research results in: yphysical layer. yNetwork layer. yApplication layer.

5 Connection to IIX via RadNet 7 Universities via VSAT TDMA SCPC Connect 3 Universities Connect to 6 Universities 5 Universities / Research Inst > 10 educational institutions

6 Results in Physical Layer zHomebrew 2Mbps CDMA. zVSAT TDMA vs. SCPC Network. zLow Cost Access for Schools. zInternet Access for Amateur Radio

7 VSAT TDMA vs. SCPC zVSAT TDMA 128Kbps Outbound zVSAT TDMA 64Kbps Inbound zVSAT TDMA is not suitable for Internet application (especially Web). zTune TDM for 40 byte (originally 256byte packet). zMigrating to VSAT SCPC 19.2Kbps at least.

8 Homebrew 2Mbps CDMA zUses Lucent CDMA 2Mbps card 915MHz 250mW. zRun on FreeBSD. zHomebrew antenna (cost ~US$150). zMax. distance 15km (use PA for more). zMost of our high speed MAN using this technology.


10 Consequences CDMA2Mbps zbypassing local line. zWe promote diffierent alternative for building high speed network.

11 Homebrew 64-256Kbps packet radio zWe are prototyping 64-256Kbps packet radio network in the lab by zAX.25 link layer protocol is used. zGMSK MX 589 one chip modem is used. zWe drive the modem via parallel port. zMMIC Minicircuit is being build for transverter.

12 Low Cost Packet Radio zBandung-Net (for Education & Research) zAMPR-Net (for Amateur Radio) yJakarta (EN), VHF/UHF, 1200 bps, 9600 bps. yBandung (ITB), VHF, 1200 bps. ySurakarta (YB2SV), VHF, 1200 bps. yMalang (UMM), VHF, 1200 bps. yIndonesia (ITB), HF, 1200 bps.

13 Low Cost Access for Schools zAX.25 1200bps Packet Radio Network. zProxy Server. zDial on Demand for Web & Interactive Internet Access.


15 Bandung-Net Not less than 50 emails/day (from Internet to Bandung-Net)

16 Amateur Radio Network Jakarta Bandung Malang



19 Results in Network Layer zNetwork Monitoring by zMonitor at yNetwork Map ySample of traffic by protocol, port, etc. yGraph of total traffic. zMigration to OSPF for internal routing.

20 Traffic Distribution Grapher Describes: zComparison between Inbound and Outbound Traffic zTraffic Distribution by Protocols zThe Most Active Routers/Hosts by Protocols zDaily Usage Trend for some Protocols  Weekly Protocol Usage Trend

21 TDG Protokol HostIn vs Out Trend URL:

22 In vs Out

23 Protokol

24 Host

25 Trend

26 Benefits: zBehaviour of the users in ITB (AI3): ySubjects of interest ySites to be visited yThe rush hours yMost actives computer/host zPlanning the traffic routing, firewalling, etc.

27 NETWORK MONITORING “Scotty & Map-Generator”

28 Scotty monitor Connectivity monitoring Interface utility monitoring

29 Scotty monitor Web screen

30 Text Map Timeout alarm E-mail to Administrator

31 Web screen Interface Utility Report

32 Results: zReconfiguration of VSAT TDMA interface speed for better performance. zMonitoring the JAMUS (ITB-YWCN) link performance. yTo Lembong: 99.525 % yTo Surabaya: 85.523 % yTo Malang: 86.282 %


34 System Platform: zPentium 100 z16 MB RAM z2,1 GB Hard disk zOperating System: FreeBSD zMain Software: Scotty/Tkined (FreeWare) and TCPDUMP. zUnder Xfree86 Windows

35 Results in Application Layer zMailing Lists zEnglish Technical Writting Course distance learning test bed. zCache & Cache Monitoring. zMPEG-3 Test Bed. zRealPublisher & NetShow test bed.

36 Cache zITB has set several Parents cache. zCache person is zWe cache all of our Web traffic. zcheck out

37 HTTP-Cache: What zUse of Proxy Server zPreviously fetched WWW objects are stored in Proxy Server zProxy Server gives cached WWW object instead of fetches it from WWW server zUse of non-persistent caching

38 HTTP-Cache: Why zWeb is the most popular application on The Net zWeb traffic in byte is about 40% zWAN link get congested zMost WWW objects are static

39 HTTP-Cache: Facts zHTTP-Cache reduces WAN traffic zMore Effective than Server mirror

40 Cache Hierarchy zCache-Server mesh zCollaborates using “parent-sibling” relationship zSibling: fetches WWW-object only if it is found in local cache zParent: always fetches requested WWW- object

41 Cache Hierarchy at ITB Network

42 Cache Usage Monitoring zLog files zDaily statistics zWeb-based report

43 Cache stats:

44 Cache stats:

45 Cache stats: cache-

46 Cache stats:

47 Results zOver 1.5Gbytes transferred data at a normal work-day zOver 400Mbytes transferred data at a weekend-day zReduces upto 19% in HTTP traffic

48 Mailing Lists zUses majordomo on FreeBSD zRun on Dual Pentium 166MHz 32Mb RAM. zMore than 220 mailing lists at ITB. (more than 75% Indonesian mailing lists). zMore than 10.000 subscribers. zWe are trying to build the community in Indonesia.

49 Distance Learning zITB’s Server:



52 Video Conference z25 October 1997: 14:00 Indonesia Time. zThree Cities: Bandung-Surabaya-Malang zCU-SeeMe & Its Reflector. zAiming for high school network in Indonesia. zJuly 1997: Panel Discussion on the future of higher education (UNU).

53 Video on Demand zSupported by Microsoft & Progressive Network. zSplitter for UNFCC COP3 December 1997. zPublisher for “Kongres Ikatan Alumni ITB” December 1997.

54 Summary zITB has managed to integrate more than 20 educational institutions to Internet. zMajor IT used: y2Mbps CDMA Network. yWeb based distance learning. yReal Publisher / Microsoft NetShow. zKey to success: Mass Qualified Human Resource



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