kumuhnet: intranet & internet technology for indonesian education network computer network...
TRANSCRIPT
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KumuhNet:IntraNet & Internet Technology for Indonesian Education Network
Computer Network Research GroupInstitute of Technology [email protected]://xxx.itb.ac.id/~cnrg/
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Focus
Existing Implemented Infrastructure.Technology Implemented to Support
Distance Learning.
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Our situation
Develop by UniversityImplemented & Run by Education
SectorFor Indonesia ….
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Outline
Current Infrastructure.Brief overview on our research
results in: physical layer. Network layer. Application layer.
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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
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Results in Physical Layer
Homebrew 2Mbps CDMA.VSAT TDMA vs. SCPC Network.Low Cost Access for Schools.Internet Access for Amateur Radio
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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.
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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.
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Consequences CDMA2Mbps
bypassing local line.
We promote diffierent alternative for building high speed network.
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Homebrew 64-256Kbps packet radio
We are prototyping 64-256Kbps packet radio network in the lab by [email protected].
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.
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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.
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Low Cost Access for Schools
AX.25 1200bps Packet Radio Network.
Proxy Server.Dial on Demand for Web &
Interactive Internet Access.
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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
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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)
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Amateur Radio Network
JakartaBandungMalang
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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
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Application Layer
TCP
AMPRNet IP (44.x.x.x)
InterNet IP
Link Layer (AX.25)
Physical Layer
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Results in Network Layer
Network Monitoring by [email protected].
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.
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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
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TDG
Protokol
HostIn vs Out
Trend
URL: http://netmon.itb.ac.id/
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In vs Out
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Protokol
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Host
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Trend
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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.
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NETWORK MONITORING
“Scotty & Map-Generator”
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Scotty monitor
Connectivitymonitoring
Interface utilitymonitoring
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Scotty monitor
Web screen
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Web screen
http://netmon.itb.ac.id/map.html
Text Map
Timeout alarm
E-mail to Administrator
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Web screen
Interface UtilityReport
http://netmon.itb.ac.id/map.html
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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 %
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System Platform:
Pentium 10016 MB RAM2,1 GB Hard diskOperating System: FreeBSDMain Software: Scotty/Tkined
(FreeWare) and TCPDUMP.Under Xfree86 Windows
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Results in Application Layer
Mailing ListsEnglish Technical Writting Course
distance learning test bed.Cache & Cache Monitoring.MPEG-3 Test Bed.RealPublisher & NetShow test bed.
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Cache
ITB has set several Parents cache.Cache person is [email protected] cache all of our Web traffic.check out
http://www.lp.itb.ac.id/~cacher/
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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
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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
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HTTP-Cache: Facts
HTTP-Cache reduces WAN trafficMore Effective than Server
mirror
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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
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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
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Cache Usage Monitoring
Log filesDaily statisticsWeb-based report
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Cache stats: ns1.itb.ac.id
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Cache stats: ns2.itb.ac.id
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Cache stats: cache-en.itb.ac.id
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Cache stats: cache.lib.itb.ac.id
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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
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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.
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Distance Learning
ITB’s Server:http://distance-courses.itb.ac.id/http://virtual-university.itb.ac.id/
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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).
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Video on Demand
Supported by Microsoft & Progressive Network.
Splitter for UNFCC COP3 December 1997.
Publisher for “Kongres Ikatan Alumni ITB” December 1997.
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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
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