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Variable Length Subnet Mask(VLSM) 可變長度子網路切割 PowerPoint Presentation
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Variable Length Subnet Mask(VLSM) 可變長度子網路切割

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Variable Length Subnet Mask(VLSM) 可變長度子網路切割 - PowerPoint PPT Presentation

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Variable Length Subnet Mask(VLSM) 可變長度子網路切割

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  1. Variable Length Subnet Mask(VLSM)可變長度子網路切割 王振生

  2. Variable Length Subnetting • VLSM allows us to use one class C address to design a networking scheme to meet the following requirements: • Taipei60 users • Kaohsiung 28 users • Taichung 12 users • Tainan 12 users • WAN links between each router

  3. Networking Requirements Taipei 60 users WAN 2 WAN 1 WAN 3 Kaohsiung 28 users Tainan 12 users Taichung 12 users • If a /26 was used to provide 60 addresses for LANs. There are no addresses left for WAN links • Classful subnetting is very wasteful.

  4. VLSM Design Scheme

  5. VLSM Design Scheme

  6. VLSM Design Scheme

  7. VLSM Design Scheme

  8. VLSM Design Scheme

  9. VLSM Design Scheme

  10. VLSM Design Scheme

  11. VLSM Design Scheme

  12. Networking Scheme Taipei/3620192.168.12.0/26 E0/0 .1 S1/2 .133 S1/0 .129 WAN 2192.168.12.132/30 S1/1 .137 WAN 1192.168.12.128/30 WAN 3192.168.12.136/30 S1/.138 S1/.134 S1/.130 F0/.65 F0/.113 F0/.97 Tainan/1721192.168.12.112/28 Kaohsiung/1721 192.168.12.64/27 Taichung/1721 192.168.12.96/28