2002 - cesnet

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ing did not reveal any subjective deterioration of the voice quality. Anotherproblem encountered during testing was caused by H.323 Optipoint 400 Standardphones, produced by Siemens. Complications concerned the use of mulawcodec and FastStart mechanism. This problem is solved in the new version offirmware. So far, we have tackled this problem by adjusting the gateway configuration.8.6.2 Siemens IWUThe gateway of Siemens is a commercial product which can be used free ofcharge for a limited evaluation period. It is a relatively extensive system withmany features, also including an H.323 gatekeeper and SIP proxy. Similarly tothe Kerio gateway, this one also serves for translation into PSTN. However, itruns only under Windows 2000 SP3. Only by the end of the year, did we acquiresuch a machine. Testing will be soon completed.8.6.3 KOM DarmstadtWe have been promised a gateway from Darmstadt University; however, wehave not received the full version, yet. This software is distributed under GPLlicence, making use of Vovida SIP stack and OpenH.323 stack, running underLinux. In addition, there were some improvements incorporated in the software.8.6.4 Clients for SIP IP TelephonyWe expect the use of both hardware and software clients. As regards hardwareclients, we have so fare tested only Cisco IP Phone 7960, with satisfactory results.The only problem is the occasional loss of connectivity in one phone,usually after some larger configuration changes and moving of the device. Thisis specifically a problem of the particular specimen, which we will try to solveby replacing the firmware. An SIP version of Siemens Optipoint 400 Standard isnow going to be tested. New SIP firmware, version 2, has not been provided sofar.Among the disadvantages of hardware phones is the typically high price. Wehave initiated some exploration in this area in order to identify reliable phonesavailable for reasonable prices which may be deployed at a larger scale.There is a sufficiency of software clients available, some of them can be usedfree of charge. We also plan some research in this area, particularly in collabo-118 High-speed National Research Network and its New Applications <strong>2002</strong>
ation with students at the Strahov student hostels, where the use of softwareclients is likely to be extensive. Microsoft Messenger is probably the best-knownsoftware client. However, we would like to point out the problem of the new version5, where it is impossible to configure servers other than .NET. We thereforerecommend using version 4.6.8.7 Peering with Foreign NetworksBased on the positive experience with peering with the CERN network in Switzerland,we decided to extend peering to some other localities. We encounteredtwo complications. First, there were not enough interesting localities availablefor IP telephony. Except for AARNET (Australian Network for Research and Education),it is difficult to find a larger installation of IP telephony that we coulduse for mutual peering, in line with the status of CESNET2. Another complicationis associated with interoperability – various networks make use of varioustypes of components (gatekeepers and voice gateways) and their mutual communicationcan be problematic.We deployed trial international peering to five universities of the IP telephonytestbed in Internet2, together with the Australian AARNET network. We alsoconnected to the international hierarchy of gatekeepers, arised from the initiativeof the project titled Welsh Video Network and the SURFnet network. Again,one of the problems is that there are not enough interesting call destinations.8.8 Definition of Future ObjectivesThe project will further consist of two sections – an operational and a researchone. We intend to continue in the verification of new technologies and protocols,implementation of new services and extension of the VoIP infrastructureaccording to users’ requirements:Operating section:• Connection of other customers according the users’ requirements, continuousproject evaluation and monitoring the operation of the VoIP network.• Peering with other networks.Research Section:• Experiments in IP telephony with SIP signalling.• Connection of IP phones.• OpenH.323 project.• Statistical evaluation of traffic.High-speed National Research Network and its New Applications <strong>2002</strong>119
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2002High-speed NationalResearch Net
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Table of Contents1 Introduction 92
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6.4.3 Support of Special Events. .
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14.3 Cisco ICM Software . . . . . .
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1 IntroductionThe report presented
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2 Brief SummaryThe research plan ti
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men. We designed the basic concept
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2.4 Other ProjectsThe objective of
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3 Operation of CESNET2During 2002,
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Canarie622 MbpsESNET622 MbpsGÉANT/
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central network core routers with t
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The existing logical topology of mu
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The logical core topology anticipat
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Within the informative part, we req
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3.6 Statistical Traffic Analysis3.6
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Figure 3.8: Influence of time step
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Praha-Plzeň, 2.5 GbpsPraha-Ústí
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CESNET2-GÉANT, 1.2 Gbps (october)C
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Part IStrategic Projects
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4 Optical Networks and theirDevelop
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US (TeraGrid with backbone 4 × 10
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ApplicationMiddlewareHigh bandwidth
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4.2.2 User InterfaceSubscribers (me
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ers will move and that other types
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GermanyCheb10 G34 MPlzeňGÉANT 622
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It is also possible to implement th
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Chemical Technology and PASNET, we
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Manufacturerwww.accton.comwww.actio
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particularly based on the fact that
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0101 NRZlaserMach-ZendermodulatorED
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Cisco ONS 15201boosterfiber 130 kmC
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5 IP version 6Further expansion of
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5.2.1 IPv6 Network TopologyFor the
Page 67 and 68: Missing in this list are especially
Page 69 and 70: 5.2.7 Connecting End Site NetworksI
Page 71 and 72: 5.4 IPv6 User Services and Applicat
Page 73 and 74: sible reprogramming of functions, a
Page 75 and 76: IPBIpb_0HFEHfe_1SORSor_0LUPLup_0RQR
Page 77 and 78: As regards our router on the PC pla
Page 79 and 80: the activities of our project. In 2
Page 81 and 82: 6 Multimedia Transmissions6.1 Objec
Page 83 and 84: scaling is considerably restricted;
Page 85 and 86: Figure 6.1: Modified program for sh
Page 87 and 88: 6.3.5 Direct Support for Pilot Grou
Page 89 and 90: programs which control the integrat
Page 91 and 92: Figure 6.4: Example of broadcast fr
Page 93 and 94: Figure 6.5: Set of tuners and serve
Page 95 and 96: and transfer the solution to an ope
Page 97 and 98: The actual computing capacity of Me
Page 99 and 100: 7.1.2 Information ServicesMetaCentr
Page 101 and 102: Figure 7.1: Grid nodes for SC2002an
Page 103 and 104: (December 2002). This was one of th
Page 105 and 106: the use of 158 processors). When we
Page 107 and 108: 8 Voice Services in CESNET2The proj
Page 109 and 110: Figure 8.1: Number of phone calls i
Page 111 and 112: VoGWs of members involved in the pr
Page 113 and 114: connection and compare the features
Page 115 and 116: • Extensive possibilities for the
Page 117: H.323 WorldSIP PhoneMS Messengerand
Page 121 and 122: 9 Quality of Service in HighspeedNe
Page 123 and 124: In addition, Juniper routers make u
Page 125 and 126: We tried to divide the capacity of
Page 127 and 128: low with respect to the capacity of
Page 129 and 130: Figure 9.10: Loss rate on Prague-Po
Page 131 and 132: sendingapplicationTCP senderseqackp
Page 133 and 134: Figure 9.13: Example of a course of
Page 135 and 136: Part IIInternational Projects
Page 137 and 138: 10 GÉANTSince 1996, CESNET has bee
Page 139 and 140: Figure 10.2: Utilization of individ
Page 141 and 142: 11 DataGridSince 2001, our research
Page 143 and 144: Therefore, we organized a meeting w
Page 145 and 146: 12 SCAMPISCAMPI (Scaleable Monitori
Page 147 and 148: 12.3.1 WP0 - Requirement AnalysisTh
Page 149 and 150: 1 6 12 18 24 30requirements analysi
Page 151 and 152: Part IIIOther Projects
Page 153 and 154: 13 Online Education Infrastructurea
Page 155 and 156: 13.1.2 Construction of a Teleinform
Page 157 and 158: with high-capacity disk memories co
Page 159 and 160: If the collaboration of individual
Page 161 and 162: ten, whereas items in the hyperlink
Page 163 and 164: Besides that, we processed some lec
Page 165 and 166: CallManager was designed using open
Page 167 and 168: tre, when we were forced to handle
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15 Intelligent NetFlow AnalyserThe
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In the second half-year, we complet
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15.4 ConclusionDuring 2002, our tea
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• data space consolidation (easy
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ecord size [kB] 256 512 1024 2048 4
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Figure 16.3: Nishan-Linux measureme
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16.3.1 No SecurityThe initiator is
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vices. These features mainly involv
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Figure 17.1: www.cesnet.cz• We ha
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The meeting was broadcast live via
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Most of the problems connected with
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Standard manipulator (privileged us
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19 Security of Local CESNET2Network
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Moreover, the program was complemen
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in the network of AV ČR Praha-Krč
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19.5 Future Plans, Expected Further
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InternetNTPEthernetKPCPPSLabelPPSLa
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generated by the NTP server. Its ou
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21 Platforms for Streaming andVideo
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streaming serverAAA (LDAPS) server1
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21.5 Video Content CollaborationPla
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First of all, we had to define an a
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international-scale broadcast will
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Part IVConclusion and Annexes
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23 ConclusionThe current developmen
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AList of connected institutionsA.1
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institutionconnection [Mbps]Institu
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Karásek Miroslav, Ing., DrSc. Czec
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Voral Pavel, Ing.Voříšek Martin,
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Burčík J.: Optické přepínání
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Veselá S.: Aktivity sdružení CES
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Krsek M.: Platformy pro streaming m
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Zatloukal K., Křivánek V.: Videok
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Satrapa P.: Scavenger: Za Internet
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