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Figure 4.1

Figure 4.1. Figure 4.2. Figure 4.3. Figure 4.4. Start of header. Ident = x. 0. Offset = 0. Rest of header. (a). 1400 data bytes. Start of header. Ident = x. 1. Offset = 0. Rest of header. 512 data bytes. (b). Start of header. Ident = x. 1. Offset = 64. Rest of header.

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Figure 4.1

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  1. Figure 4.1

  2. Figure 4.2

  3. Figure 4.3

  4. Figure 4.4

  5. Start of header Ident = x 0 Offset = 0 Rest of header (a) 1400 data bytes Start of header Ident = x 1 Offset = 0 Rest of header 512 data bytes (b) Start of header Ident = x 1 Offset = 64 Rest of header 512 data bytes Start of header Ident = x 0 Offset = 128 Rest of header 376 data bytes Figure 4.5

  6. Figure 4.6

  7. Control processor Switching fabric Input Output port port Figure 4.7

  8. 0 8 16 31 Hardware type = 1 ProtocolType = 0x0800 HLen = 48 PLen = 32 Operation SourceHardwareAddr (bytes 0 ― 3) ― 5) ― 1) SourceHardwareAddr (bytes 4 SourceProtocolAddr (bytes 0 SourceProtocolAddr (bytes 2 TargetHardwareAddr (bytes 0 ― 3) ― 1) ― 5) TargetHardwareAddr (bytes 2 TargetProtocolAddr (bytes 0 ― 3) Figure 4.8

  9. Figure 4.9

  10. Figure 4.10

  11. Figure 4.11

  12. Figure 4.12

  13. Figure 4.13

  14. Figure 4.14

  15. Figure 4.15

  16. Figure 4.16

  17. Figure 4.17

  18. Figure 4.18

  19. Figure 4.19

  20. Figure 4.20

  21. Figure 4.21

  22. Figure 4.22

  23. Figure 4.23

  24. NSFNET backbone Stanford ISU BARRNET MidNet ■ ■ ■ regional Westnet regional regional Berkeley PARC UNL KU UNM NCAR UA Figure 4.24

  25. Figure 4.25

  26. Figure 4.26

  27. Figure 4.27

  28. Figure 4.28

  29. Large corporation “Consumer” ISP Peering point Backbone service provider Peering point “Consumer” ISP “Consumer” ISP Large corporation Small corporation Figure 4.29

  30. Figure 4.30

  31. Figure 4.31

  32. Figure 4.32

  33. 3 m n o p 125 - m - n - o - p 010 RegistryID ProviderID SubscriberID SubnetID InterfaceID Figure 4.33

  34. Figure 4.34

  35. Figure 4.35

  36. Figure 4.36

  37. Figure 4.37

  38. Figure 4.38

  39. Figure 4.39

  40. 10 .1.1 /2 4 R3 1 0 0 R1 R2 10 .3.3 /2 4 Pr efix Interface Pr efix Interface R4 10 .1.1 0 10 .1.1 1 10 .3.3 0 10 .3.3 0 ■ ■ ■ ■ ■ ■ Figure 4.40

  41. 10.1.1/24 Label = 15, Prefix = 10.1.1 R3 1 0 0 R1 R2 10.3.3/24 R4 Prefix Interface Label Prefix Interface 10.1.1 0 15 10.1.1 1 10.3.3 0 16 10.3.3 0 ■ ■ ■ ■ ■ ■ (a) 10.1.1/24 R3 1 R1 R2 0 0 10.3.3/24 R4 Remote Label Prefix Interface Prefix Interface Label 10.1.1 0 15 15 10.1.1 1 16 10.3.3 0 10.3.3 0 16 ■ ■ ■ ■ ■ ■ (b) Figure 4.41ab

  42. Label = 24, Prefix = 10.1.1 10.1.1/24 R3 1 0 0 R1 R2 10.3.3/24 R4 Remote Remote Label Prefix Interface Label Prefix Interface Label 10. 1. 1 0 15 15 10.1.1 1 24 16 10.3.3 0 10. 3. 3 0 16 ■ ■ ■ ■ ■ ■ Figure 4.41c (c)

  43. (a) ATM cell GFC VPI VCI PTI CLP HEC DATA header Label “ Shim header (b) “ (for PPP, Ethernet, PPP header Label header Layer 3 header etc.) Figure 4.42

  44. Figure 4.43

  45. Figure 4.44

  46. Figure 4.45

  47. Figure 4.46

  48. Figure 4.47

  49. Figure 4.48

  50. Figure 4.49

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