C08.PDF

Size: px

Start display at page:

Download "C08.PDF"

うたろうおいもり
5 years ago
Views:

1 QoS Diffserv Internet Week 99 Internet Week kenjiro Cho, Japan Network Information Center

3 1 DiffServ DiffServ DiffServ DiffServ 2 DiffServ congestion 90 IP IP 3 QoS 3.1 QoS QoSQuality of Services

4 admission control classifier IP 5 DiffServ IP TOSType Of Services shaping/ policing packet scheduling QoS

5 Priority Queuing 1Priority Queuing WFQWeighted Fair Queuing TCP 2WFQWeighted Fair Queuing

6 CBQClass-Based Queuing 3CBQClass-Based Queuing 3.3 % Drop-Tail / Drop-Head / Drop-Random Drop-Tail FIFO Drop-Head TCP Drop- Random

7 3.3.2 REDRandom Early Detection TCP RED 4 4RED UDP

8 4 4.1 QoS ARPANET 7 8 5

9 Parekh QoS Parekh Parekh WFQ WFQ WFQ ISDN ATM QoS IntServ DiffServ 6

10 4.1 ATM DiffServATM ATM DiffServ VC ID CBRConstant Bit RateUBRUnspecified Bit RateVBRVariable Bit Rate ATM ATM ATM 4.2 IP TOS IP 2 8 TOS 7 QoS DiffServ 7TOS

11 Precedence 3 4 low delay throughput reliability min cost DiffServ TOS 5 IntServ RSVP 5.1 IntServ DiffServ 89 IntServ RSVP IntServIntegrated ServiceQoS RSVPReSerVation ProtocolRSVP IntServ QoS IntServ 2 1 Guaranteed QoS Control QoS Guaranteed QoS Control Controlled-Load IntServ TCP

12 8 r r b IntServ 5.2 RSVP RSVP IP

13 RSVP DiffServ 6 DiffServ IntServ/RSVP ISP ISP IP TOS QoS QoS IntServ/RSVP provisioning

14 6.1 DiffServ DiffServ QoS QoS CoSClass of Service QoS QoS TOS 9 TOS 6 DSDifferentiated Service DSCPDiffServ Code PointDS DSCP 9TOS IPv6 6 Traffic Class DS DSCP DSCP AS 2 DS

15 PHBPer-Hop Behavior DS DSCP DS ISP DiffServ TOS DS DiffServ DiffServ IntServ/RSVP IntServ/RSVP DiffServ IntServ/RSVP 6.2 DiffServ forwarding behaviorphb DiffServ

16 DSCP DSCP 10DS PHB DSCP ISP DS DS DS DS DSCP 6.3 DiffServ DiffServ IETFInternet Engineering Task Force Munich IntServ DiffServ BOF IETF DiffServ ISP

17 97 DiffServ BOF DiffServ DiffServ Premium Service Model V. Jacobson EF PHB 10% ATM CBR Drop Precedence Model D. ClarkMIT AF PHB RED RIORED with IN and OUT / RIO RED 11RIO

18 Cisco's CoS Precedence F. Baker Class Selector PHB Precedence 7 RIO WREDWehghted RED IETF DiffServ IPv4 TOS IPv6 Traffic Class DS RFC1394 PHB 7 DiffServ 7.1 DiffServ DiffServ QoS PHB 12DiffServ

19 13 Classifier DS BABehavior Aggregate MFMulti Field in-profile out-of-profile meter rate 3-color maker DS DSCP

20 shaper dropper 7.2 PHBPer-Hop Behavior PHB PHB Default PHB xxx000 Class Selector PHBs 7 IP Precedence WFQWRRCBQ cccdd0 AFAssured ForwardingPHBs 12 ccc dd drop precedence 4 3 Precedence Precedence EFExpedited ForwardingPHB PHB PHB PQWFQWRRCBQ xxxx11 Experimental/LocalUse xxxx01 Experimental/LocalUse

21 8 DiffServ QoS 8.1 EF r b in-profile msec % out-of-profile ISP in-profile EF DSCP out-of-profile ISP DS 10% EF EF 8.2 AF r b in-profile msec % out-of-profile

22 ISP 4 AF DSCP ISP DS 50% AF 9 DiffServ DiffServ DS PHB Bandwidth Broker COPS DiffServ QoS

23 RSVP over DiffServ RSVP DiffServ RSVP 10 QoS ISP DiffServ IETF IETF DiffServ IETF IntServ IETF ISSLL IETF RSVP RSVP

24 ALTQ Differentiated Services for the Internet. K. Kilkki. ISBN Quality of Service. P. Ferguson and G. Huston. Wiley, ISBN An Engineering Approach to Computer Networking. S. Keshav. Addison-Wesley, ISBN High-speed Networks: TCP/IP and ATM Design Principles. W. Stallings. Prentice Hall, ISBN Gigabit Networking. C. Partridge. Addison-Wesley, ISBN

IP: TCP: QoS 90 QoS IP IP IP

InternetWeek99 QoS DiffServ kjc@csl.sony.co.jp DiffServ DiffServ DiffServ DiffServ IP: TCP: QoS 90 QoS IP IP IP QoS QoS (admission control) (classifier) (shaping)(policing) (packet scheduler) (signaling)