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Differentiated Services

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This is a simplified presentation on the Diff Serv field in the IPv4 and IPv6. It was used to give laymen knowledge on the topic.

This is a simplified presentation on the Diff Serv field in the IPv4 and IPv6. It was used to give laymen knowledge on the topic.

Published in: Technology

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Transcript

  • 1. DIFFERENTIATED SERVICES
  • 2. WHY?
  • 3. NETWORK TRAFFIC
  • 4. SOME CATEGORIES OF NETWORK TRAFFIC REQUIRE PREFERNTIAL TREATMENT
  • 5. ONLINE GAMING
  • 6. VOIP
  • 7. STREAMING MEDIA
  • 8. ROUTINE NETWORK TRAFFIC TREATED NORMALLY “BEST EFFORT”
  • 9. GAURANTEED PERFORMANCE RESERVE NETWORK CAPACITY MEASUREMENT • BIT RATE • DELAY • PACKET DROP PROBABILITY • BIT ERROR RATE
  • 10. DIFFERENTIATED SERVICES
  • 11. TOS FD
  • 12. DS FD
  • 13. DIFF SERV 6-BIT DS FD - DSCP TOS FD OF IPv4 TRAFFIC CLASS IN IPv6 SIMPLE WIDELY USED QoS
  • 14. DIFF SERV WORKS ON THE BASIS OF “TRAFFIC CLASSIFICATION”
  • 15. TRAFFIC CL
  • 16. TRAFFIC CL RATE LIMITING TRAFFIC POLICING/ SHAPING
  • 17. NETWORK TRAFFIC POLICING
  • 18. NETWORK TRAFFIC POLICING
  • 19. ROUTERS IMPLEMENT “PER HOP BEHAVIOUR (PHB)”
  • 20. BEST EFFORT PHB
  • 21. SERVICE DEPENDENT ON TRAFFIC CONDITIONS
  • 22. EXPEDITED FORWARDING PHB
  • 23. EF LOW LOSS LOW LATENCY STRICT PRIORITY QUEUING STRICT CONTROL BY ISP ~ 30%
  • 24. PRIORITY QUEUING
  • 25. EF LOW LOSS LOW LATENCY STRICT PRIORITY QUEUING STRICT CONTROL BY ISP ~ 30%
  • 26. EXPEDITED FORWARDING PHB
  • 27. ASSURED FORWARDING PHB
  • 28. ASSURED FORWARDING
  • 29. • ASSURANCE OF DELIVERY • STATE OF TFC CONDITION • CONTROLLED ASSURED FORWARDING
  • 30. ASSURED FORWARDING CLASS 1 (LOWEST) CLASS 2 CLASS 3 CLASS 4 (HIGHEST) LOW DROP DSCP 10 DSCP 18 DSCP 26 DSCP 34 MED DROP DSCP 12 DSCP 20 DSCP 28 DSCP 36 HIGH DROP DSCP 14 DSCP 22 DSCP 30 DSCP 38 Q
  • 31. CLASS SELECTOR (CS) PHB “XXX000”
  • 32. CLASS SELECTOR PHB
  • 33. DESIGN CONSIDERATIONS
  • 34. DESIGN CONSIDERATIONS
  • 35. RECAP QoS DSCP – IPv4 & IPv6 TFC CL PHB • BEST EFFORT • EF • AF QUEUING TECHNIQUES DESIGN
  • 36. REFERENCE & FURTHER READING RFC 2474 DEFINITION OF THE DIFFERENTIATED SERVICES FIELD (DS FIELD) IN THE IPV4 AND IPV6 HEADERS RFC 2475 ARCHITECTURE FOR DIFFERENTIATED SERVICES RFC 2597 ASSURED FORWARDING PHB GROUP RFC 2983 DIFFERENTIATED SERVICES AND TUNNELS RFC 3086 DEFINITION OF DIFFERENTIATED SERVICES PER DOMAIN BEHAVIORS AND RULES FOR THEIR SPECIFICATION RFC 3140 PER HOP BEHAVIOR IDENTIFICATION CODES RFC 3246 AN EXPEDITED FORWARDING PHB RFC 3247 SUPPLEMENTAL INFORMATION FOR THE NEW DEFINITION OF THE EF PHB
  • 37. REFERENCE & FURTHER READING RFC 3260 NEW TERMINOLOGY AND CLARIFICATIONS FOR DIFFSERV RFC 4594 CONFIGURATION GUIDELINES FOR DIFFSERV SERVICE CLASSES RFC 5865 A DIFFERENTIATED SERVICES CODE POINT (DSCP) FOR CAPACITY-ADMITTED TRAFFIC RFC 3289 MANAGEMENT INFORMATION BASE FOR THE DIFFERENTIATED SERVICES ARCHITECTURE RFC 3290 AN INFORMAL MANAGEMENT MODEL FOR DIFFERENTIATED SERVICES ROUTERS RFC 3317 DIFFERENTIATED SERVICES QUALITY OF SERVICE POLICY INFORMATION BASE