Information Technology for Indonesian Education Network Computer Network

Information Technology for Indonesian Education Network Computer Network Research Group Institute of Technology Bandung cnrg@itb. ac. id http: //xxx. itb. ac. id/~cnrg/

Focus z. Existing Implemented Infrastructure. z. Experience in Building an AII. z. Low Cost Technology To Educate Indonesia. Low cost is the real challenge

Our situation z. Develop by University z. Implemented & Run by Education Sector z. For Indonesia ….

Outline z. Historical Perspective z. Current Infrastructure. z. Brief overview on our research results in: yphysical layer. y. Network layer. y. Application layer.

Experience in Internet building z. January 1993 - Suryono (Texas) install a packet radio 1200 bps to LAPAN. z. LAPAN 1200 bps to BPPT & Internet 64 Kbps. z 286 PC as gateway! to connect the whole ITB campus. z. Software NOS (running on DOS) as gateway.

Indonesia Topology Jan. 1993 Amateur Packet Radio AX. 25 at 1200 bps Starts from simple equipment We grow the community PC Gateway 286!

ITB in 1995 z. Telkom Leased Line at 14. 4 Kbps z. RISTI-Telkom to BPPT 64 Kbps. z. ITB uses Free. BSD (UNIX) as Router & Server. z. For the first time ITB sees Web in Internet. z. ITB learns to build a campus network (how to handle the lightning).

Typical ITB Campus Net

ITB Today. . z. T 1 Satelite link to Japan. z 2 Mbps link to Indonesia IX. z. VSAT TDMA & SCPC to various universities. z 4 Mbps Uwave Jakarta-Bandung. z 128 Kbps to Jakarta, Surabaya & Malang. z. Wave. LAN 2 Mbps for Metropolitan Area Network (MAN).

ITB Network Operation Center

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

Key to Success Involving students Gives incentives The more people in the process! for education! the lower the cost Human Resource Development! Self-financing! Community-base development.

Results in Physical Layer z. Homebrew 2 Mbps CDMA. z. VSAT TDMA vs. SCPC Network. z. Low Cost Access for Schools. z. Internet Access for Amateur Radio

VSAT TDMA vs. SCPC z. VSAT TDMA 128 Kbps Outbound z. VSAT TDMA 64 Kbps Inbound z. VSAT TDMA is not suitable for Internet application (especially Web). z. Tune TDM for 40 byte (originally 256 byte packet). z. Migrate to VSAT SCPC (min) 19. 2 Kbps.

Homebrew 2 Mbps CDMA z. Uses Lucent CDMA 2 Mbps card 915 MHz 250 m. W. z. Run on Free. BSD. z. Homebrew antenna (cost ~US$150). z. Max. distance 15 km (use PA for more). z. Most of our high speed MAN using this technology.

Consequences CDMA 2 Mbps zbypassing local line. z. We promote different alternative for building high speed network.

Homebrew 64 -256 Kbps packet radio z. We are prototyping 64 -256 Kbps packet radio network in the lab by adnan@itb. ac. id. z. AX. 25 link layer protocol is used. z. GMSK MX 589 one chip modem is used. z. We drive the modem via parallel port. z. MMIC Minicircuit is being build for transverter.

Low Cost Access for Schools z. AX. 25 1200 bps Packet Radio Network. z. Proxy Server. z. Dial on Demand for Web & Interactive Internet Access.

Intra. Net for High Schools 24 hours Proxy & Dial-on-Demand Packet Radio for Web on Demand E-mail

Soundblaster Modem z. PC running Linux z. Software Modem Packet Radio for Soundblaster z. Connect SB-10 to Radio z. Speed 1200 -9600 bps.

Amateur Radio Network Jakarta Bandung Malang

AMPR. ORG NET ITB GATEWAY UNIV. MUHAMMADIYAH YB 2 SVMALANG (JOS SOEJOSO) SALATIGA ELEKTRINDO NUSANTARA

Mobile Computing

Results in Network Layer z. Network Monitoring by ismail@cnrg. itb. ac. id. z. Monitor at http: //netmon. itb. ac. id/ y. Network Map y. Sample of traffic by protocol, port, etc. y. Graph of total traffic.

Traffic Distribution Grapher Describes: z Comparison between Inbound and Outbound Traffic z Traffic Distribution by Protocols z The Most Active Routers/Hosts by Protocols z Daily Usage Trend for some Protocols z Weekly Protocol Usage Trend

TDG URL: http: //netmon. itb. ac. id/ In vs Out Host Protokol Trend

Benefits: z. Behaviour of the users in ITB (AI 3): y. Subjects of interest y. Sites to be visited y. The rush hours y. Most actives computer/host z. Planning the traffic routing, firewalling, etc.

Network Monitoring “Scotty & Map Generator”

Scotty monitor Connectivity monitoring Interface utility monitoring

Web screen Scotty monitor

http: //netmon. itb. ac. id/map. html Text Map Web screen Timeout alarm E-mail to Administrator

http: //netmon. itb. ac. id/map. html Web screen Interface Utility Report

Results: z. Reconfiguration of VSAT TDMA interface speed for better performance. z. Monitoring the JAMUS (ITB-YWCN) link performance. y. To Lembong: 99. 525 % y. To Surabaya: 85. 523 % y. To Malang: 86. 282 %

System Platform: z. Pentium 100 z 16 MB RAM z 2, 1 GB Hard disk z. Operating System: Free. BSD z. Main Software: Scotty/Tkined (Free. Ware) and TCPDUMP. z. Under Xfree 86 Windows

Results in Application Layer z. Mailing Lists z. English Technical Writting Course distance learning test bed. z. Cache & Cache Monitoring. z. MPEG-3 Test Bed. z. Real. Publisher & Net. Show test bed.

Cache z. ITB has set several Parents cache. z. Cache person is husni@itb. ac. id z. We cache all of our Web traffic. zcheck out http: //www. lp. itb. ac. id/~cacher/

HTTP-Cache: What z. Use of Proxy Server z. Previously fetched WWW objects are stored in Proxy Server z. Proxy Server gives cached WWW object instead of fetches it from WWW server z. Use of non-persistent caching

HTTP-Cache: Why z. Web is the most popular application on The Net z. Web traffic in byte is about 40% z. WAN link get congested z. Most WWW objects are static

HTTP-Cache: Facts z. HTTP-Cache reduces WAN traffic z. More Effective than Server mirror

Cache Hierarchy z. Cache-Server mesh z. Collaborates using “parent-sibling” relationship z. Sibling: fetches WWW-object only if it is found in local cache z. Parent: always fetches requested WWWobject

Cache Hierarchy at ITB Network

Cache Usage Monitoring z. Log files z. Daily statistics z. Web-based report

Cache stats: ns 1. itb. ac. id

Cache stats: ns 2. itb. ac. id

Results z. Over 1. 5 Gbytes transferred data at a normal work-day z. Over 400 Mbytes transferred data at a weekend-day z. Reduces upto 19% in HTTP traffic

Mailing Lists z. Uses majordomo on Free. BSD z. Run on Dual Pentium 166 MHz 32 Mb RAM. z. More than 220 mailing lists at ITB. (more than 75% Indonesian mailing lists). z. More than 10. 000 subscribers. z. We are trying to build the community in Indonesia.

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

Video Conference z 25 October 1997: 14: 00 Indonesia Time. z. Three Cities: Bandung-Surabaya-Malang z. CU-See. Me & Its Reflector. z. Aiming for high school network in Indonesia. z. July 1997: Panel Discussion on the future of higher education (UNU).

Video on Demand z. Supported by Microsoft & Progressive Network. z. Splitter for UNFCC COP 3 December 1997. z. Publisher for “ITB’s Alumny Congress” December 1997.

Summary z. ITB has managed to integrate 20+ educational institutions to Internet. z. Major IT used: y 2 Mbps CDMA Network. y. Web based distance learning. y. Real Publisher / Microsoft Net. Show. z. Key to success: Mass Qualified Human Resource

References zhttp: //ai 3. itb. ac. id/ zhttp: //xxx. itb. ac. id/~yc 1 dav/ zhttp: //xxx. itb. ac. id/~cnrg/ zhttp: //xxx. itb. ac. id/~adnan/ zhttp: //distance-courses. itb. ac. id/ zhttp: //virtual-university. itb. ac. id/ zhttp: //netmon. itb. ac. id/ zhttp: //nic. itb. ac. id/