QoS Diffserv 1999 12 14 Internet Week 99 Internet Week 99 1999 kenjiro Cho, Japan Network Information Center
1 DiffServ DiffServ DiffServ DiffServ 2 DiffServ congestion 90 IP IP 3 QoS 3.1 QoS QoSQuality of Services
admission control classifier IP 5 DiffServ IP TOSType Of Services shaping/ policing packet scheduling QoS
3.2 3.2.1 Priority Queuing 1Priority Queuing 3.2.2 WFQWeighted Fair Queuing TCP 2WFQWeighted Fair Queuing
1 1 3.2.3 CBQClass-Based Queuing 3CBQClass-Based Queuing 3.3 % 3.3.1 Drop-Tail / Drop-Head / Drop-Random Drop-Tail FIFO Drop-Head TCP Drop- Random
3.3.2 REDRandom Early Detection TCP RED 4 4RED UDP
4 4.1 QoS ARPANET 7 8 5
4.2 80 Parekh QoS Parekh Parekh WFQ WFQ WFQ ISDN ATM QoS IntServ DiffServ 6
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
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
8 r r b IntServ 5.2 RSVP RSVP IP
RSVP DiffServ 6 DiffServ IntServ/RSVP ISP ISP IP TOS QoS QoS IntServ/RSVP provisioning
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
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
DSCP DSCP 10DS PHB DSCP ISP DS DS DS DS DSCP 6.3 DiffServ DiffServ IETFInternet Engineering Task Force 1997 8 Munich IntServ DiffServ BOF 1998 3 IETF DiffServ ISP
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
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
13 Classifier DS BABehavior Aggregate MFMulti Field in-profile out-of-profile meter 2 3 2-rate 3-color maker DS DSCP
shaper dropper 7.2 PHBPer-Hop Behavior PHB PHB 000000 Default PHB xxx000 Class Selector PHBs 7 IP Precedence WFQWRRCBQ cccdd0 AFAssured ForwardingPHBs 12 ccc dd drop precedence 4 3 Precedence Precedence 101110 EFExpedited ForwardingPHB PHB PHB PQWFQWRRCBQ xxxx11 Experimental/LocalUse xxxx01 Experimental/LocalUse
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
ISP 4 AF DSCP ISP DS 50% AF 9 DiffServ DiffServ DS PHB Bandwidth Broker COPS DiffServ QoS
RSVP over DiffServ RSVP DiffServ RSVP 10 QoS ISP DiffServ 11 11.1 IETF http://www.ietf.org/ IETF DiffServ http://www.ietf.org/html.charters/diffserv-charter.html IETF IntServ http://www.ietf.org/html.charters/intserv-charter.html IETF ISSLL http://www.ietf.org/html.charters/issll-charter.html IETF RSVP http://www.ietf.org/html.charters/rsvp-charter.html RSVP http://www.isi.edu/rsvp/
ALTQ http://www.csl.sony.co.jp/~kjc/software.html 11.2 Differentiated Services for the Internet. K. Kilkki. ISBN 1-57870-132-5. 1999. Quality of Service. P. Ferguson and G. Huston. Wiley, ISBN 0-471-24358-2. 1998. An Engineering Approach to Computer Networking. S. Keshav. Addison-Wesley, ISBN 0-201-63442-2. 1997. High-speed Networks: TCP/IP and ATM Design Principles. W. Stallings. Prentice Hall, ISBN 0-13-904954-1. 1998. Gigabit Networking. C. Partridge. Addison-Wesley, ISBN 0-201-56333-9. 1993.