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Bez nadpisu

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Zapojen se do projektu IST (Tequila, SCAMPI) Testy QoS mechanizmu (nez visle na platfome) ... Cisco 7500 Gigabit Ethernet reserved bandwidth test ... – PowerPoint PPT presentation

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Title: Bez nadpisu


1
QoS v IP
Vladimír Smotlacha, Sven Ubik
Kouty, 22.2.2001
2
Cíle v 1. pololetí 2001
  • Testy QoS mechanizmu na smerovacích Cisco
  • Testy QoS mechanizmu v OS Linux
  • Spolupráce na projektu TF-NGN Delay and jitter
    sensitive services
  • Zapojení se do projektu IST (Tequila, SCAMPI)

3
Testy QoS mechanizmu (nezávisle na platfome)
V kontextu diffserv
  • Metering, classification, marking
  • Policing, traffic shaping
  • Scheduling - PQ, WFQ
  • Congestion management - WRED

V kontextu intserv
  • Rezervacní protokoly (RSVP, YESSIR)

4
Platformy pro testy QoS
  • Cisco
  • Extreme ?
  • Linux
  • FreeBSD


5
Provedené testy
http//www.ten.cz/projekt/qosip
  • Cisco 7500 Gigabit Ethernet reserved bandwidth
    test
  • Cisco 7500 Fast Ethernet reserved bandwidth test
  • Traffic shaping precision test

https//www.ten.cz/skupiny/qosip
  • GSR016 MDRR test

6
Projekt Tequila
Traffic Engineering for Quality of Service
in the Internet at Large Scale
  • Cíl navrhnout a implementovat architekturu,
    algoritmy a protokoly pro dohodnutí a zajitení
    SLS (Service Level Specification)
  • Kvantitativní parametry
  • Ztrátovost cas
  • Propustnost cas
  • Zpodení cas ( kvantil)
  • Jitter cas ( kvantil)
  • Kvalitativní parametry (relativní) - low,
    medium, high

7
Návrh slueb na úrovni IP v Géant
  • IP Premium - virtual wire
  • reserved bandwidth, null loss, bounded delay and
    jitter
  • strict policing on ingress
  • for real-time, loss sensitive applications
  • implemented by EF PHB
  • GCS (Guaranteed Capacity Service)
  • reserved bandwidth
  • token bucket policing on ingress
  • for TCP/UDP applications with better treatment
  • implemented by AF PHB
  • Best effort
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