Verifikation von IP-Multicast | 2. April 2015 | Final Presentation subtitle: 20pt Arial Regular, teal R045 | G182 | B179 Recommended maximum length: 2.

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Verifikation von IP-Multicast | 2. April 2015 | Final Presentation subtitle: 20pt Arial Regular, teal R045 | G182 | B179 Recommended maximum length: 2 lines Confidentiality/date line: 13pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Disclaimer information may also be appear in this area. Place flush left, aligned at bottom, 8-10pt Arial Regular, white IBM logo must not be moved, added to, or altered in any way. Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements Presentation title: 28pt Arial Regular, black Recommended maximum length: 2 lines Group name: 17pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast am Max-Planck- Institut Erste Ergebnisse Steffen Tambach Title slide

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 2 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen 5 Min. 10 Min. 15 Min. 40 Min. Messungen an der Senke

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 3 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 4 Wdh. Testszenario No. 4 – Paketverlustmessungen am Empfänger Messwerte (gesendet Pkts. à 100 Byte) Shomiti ( Pkts.) Receiver 1 ( Pkts.) Receiver 2 ( Pkts.) Receiver 3 ( Pkts.) Receiver 4 ( Pkts.)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 5 Nachweisbare Verluste auf der Empfängerseite erfordern weitere Testszenarien (Vorschläge aus der letzten Diskussionsrunde):  Verwendung von reinem UDP unicast anstelle von IP-Multicast  Verwendung von TCP anstelle UDP: Werden Datenpakete wiederholt gesendet?  Künstliche Erzeugung eines burstartigen Verhaltens der Quelle  Quelle ist der Verursacher von Verlusten bei der Senke  Besteht ein Unterschied zwischen C/C++ und Java hinsichtlich der verwendeten Ressourcen?  Punkt-zu-Punkt-Verbindung mit TAP und Shomiti Explorer (Simulation der Quelle mittels Paketgenerator des Shomiti Explorer) Rückblick (Diskussion)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 6 Agenda Rückblick – letzter Stand Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 7 Empfänger-Testszenario No. 1 zum Suchen der Paketverluste in der Senke Erweiterung der Testprogramme mcReceiverJava (Java-Code) mcReceiverC (C/C++-Code BSD Socket-API) mcSniffer (Linux paket filter) mcModule.ko (Kernel-Modul f. 2.6.x. Benutzt die Hook-Funktionen im Netzwerkstack des Kernels)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 8  50 Messreihen à 100 Byte payload (Ø 2ms pro Paket)  Stochastisches Auftreten der Paketverluste bei den Empfängern Ergebnisse 1.Shomiti – Kanal 1 (TAP)alle gesendeten Pakete empfangen 2.Shomiti – Kanal 2 (Switch)alle gesendeten Pakete empfangen 3.mcReceiverJava0 ~ Pakete verloren 4.mcReceiver0 ~ Pakete verloren 5.mcSniffer0 ~ 900 Pakete verloren alle 6.mcModulealle gesendeten Pakete empfangen ÄWie werden ankommende Pakete von der NIC bzw. vom Kernel behandelt?

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 9 Weg eines Pakets im Linux-Kernel (Auszug) Quelle: Linux Architektur – Konzepte, Strukturen und Algorithmen von Kernel 2.6

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 10 Linux 2.4.x / 2.6.x- Kernel  Konfigurationsmöglichkeiten  Kernel-Patch  Neukompilierung des Kernels  zur Laufzeit über das /proc - Filesystem (root-Rechte erfordl.) echo > /proc/sys/net/core/rmem_default echo > /proc/sys/net/core/rmem_max  weitere Einstellung zu den jeweiligen Socket-Buffer sind hier ebenfalls möglich ( wmem_default )  Aber eine zusätzliche Kontrolle ist im Programm zur Laufzeit notwendig! Socket-Konfiguration – WrtBuffer/ RcvBuffer(1/2)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 11  Unter C/C++ (Linux) verwendet die BSD Socket-API standardmäßig die rmem_default bzw. wmem_default Werte. Diese Werte sind kernelabhängig! int rcvSize = , socket_descriptor =0; socket_descritor =socket(PF_INET, SOCK_DGRAM, 0); setsockopt ( socket_descriptor, SOL_SOCKET, SO_RCVBUF, &rcvSize, sizeof(rcvSize) );  Für Java-Anwendungen gilt der Default-Wert (i.d.R. 54KB) Multicast mc =new MulticastSocket(int port); mc.setReceiveBufferSize(int size)  Konfiguration der default bzw. max -Werte im Betriebssystem MS Windows 2000/XP ? Socket-Konfiguration – WrtBuffer/ RcvBuffer (2/2)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 12  UDP-Verluste auf Empfängerseite sind u.a. ein Bufferproblem  UDP besitzt keine Flusskontrolle, d.h. ist der Socket-Buffer voll, werden ankommende Pakete verworfen  Aufbau und Speicherstruktur von Netzwerkkomponenten spielen hier eine wichtige Rolle! Zusammenfassung

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 13 Agenda Einführung/ Rückblick Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 14 Umsetzung der gewonnenen Erkenntnisse im MonitorClient (MonClient)(1/2) CPU- Auslastung Netzwerk- verkehr

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 15 Umsetzung der gewonnenen Erkenntnisse im MonitorClient (MonClient) - Erhöhung der Bandbreite(2/2)

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 16 MonitorClient (MonClient) – Architektur UML-Diagramm MonClient (Auszug) GUI network

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 17 MonitorClient (MonClient) – Messungen zur Laufzeit(1/2)  Test des Empfangs von Paketen sowie deren Visualisierung mittels der Open Source Physics Library (vgl. Folie 14/15) durch zwei Referenzzähler innerhalb der Klassen MonClientWorker und MCAReceiver  Ausgabe/ Ergebnis erfolgt durch die addShutdownHook-Methode (Runtime) nach Beendigung des MonClients  Messergebnisse (Auszug) ~ 5,4MBit/s; Pkts.; 3 hops pktCounterModulepktCounterRcv.pktCounterVisualizer …

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 18 MonitorClient (MonClient) – Messungen zur Laufzeit(2/2)  Wdh. mit voller Bandbreite (91,21 Mbit/s) führt zum Verwerfen empfangener Pakete bereits auf der Netzwerkkarte – sh. NIC-Statistik  Messergebnisse(Auszug) ~ 91,21 MBit/s; Pkts. pktCounterModulepktCounterRcv.pktCounterVisualizer … eth0 Protokoll:Ethernet Hardware Adresse 00:0A:E4:2E:2A:34 inet Adresse: Bcast: Maske: UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets: errors: dropped: overruns: TX packets:1456 errors:0 dropped:0 overruns:0 carrier:0 Kollisionen:0 Sendewarteschlangenlänge:1000 …

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 19 Agenda Einführung/ Rückblick Aktueller Stand Weiteres Vorgehen/ Lösung? Diskussion & Fragen Messungen an der Senke

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 20 UDP besitzt eine unregulierte Senderate (u.a. CPU-abhängig)  Implementierung UDP mit dynamischer Lastanpassung (adaptive Überlastkontrolle)  Aufbrechen des BooleanLock-Musters (Thread-Synchronisation)  asynchrone I/O, Paketwarteschlange Weiteres Vorgehen

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 21 Danke Noch Fragen?

IBM logo must not be moved, added to, or altered in any way. Background should not be modified. Title/subtitle/confidentiality line: 10pt Arial Regular, white Maximum length: 1 line Information separated by vertical strokes, with two spaces on either side Slide heading: 28pt Arial Regular, blue R120 | G137 | B251 Maximum length: 2 lines Slide body: 18pt Arial Regular, black Square bullet color: teal R045 | G182 | B179 Recommended maximum text length: 5 principal points Group name: 14pt Arial Regular, white Maximum length: 1 line Copyright: 10pt Arial Regular, white Template release: Oct 02 For the latest, go to Verifikation der Anwendbarkeit von IP-Multicast – Erste Zwischenergebnisse Optional slide number: 10pt Arial Bold, white Indications in green = Live content Indications in white = Edit in master Indications in blue = Locked elements Indications in black = Optional elements 22 Diskussionsergebnisse  Der Open Source Physics Visualizer besitzt nur eine begrenzte Aufnahme von Daten?  Schnittstelle Netzwerkkommunikation C/C++  Darstellung der Daten mit Java  Konkrete Aussagen über die Konfiguration unter Win2000/ XP  Windows Registry  Hennig/Müller  Testprogramm Speichergrenze für UDP-Sockets  Nice to have: jfreechart  OSP

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