Networking / Beginners

Interaccess point communication as part of the distribution system

Included with this distribution system is a method to manage associations. A wireless station is associated with only one access point at a time. If a station is associated with one access point, all the other access points in the ESS need to learn about that station. In Figure previous section "Extend Service Set", AP4 must know about all the stations associated with AP1. If a wireless station associated with AP4 sends a frame to a station associated with AP1, the bridging engine inside AP4 must send the frame over the backbone Ethernet to AP1 so it can be delivered to its ultimate destination. To fully implement the distribution system, access points must inform other access points of associated stations. Naturally, many access points on the market use an interaccess point protocol (IAPP) over the backbone medium. Many vendors developed proprietary protocols between access points to carry association data. A standard IAPP was produced as 802.11F, but I am not aware of its use in any products.

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In this tutorial:

  1. 802.11 Networks
  2. IEEE 802 Network Technology Family Tree
  3. Nomenclature and Design
  4. Types of Networks
  5. Independent networks
  6. Infrastructure networks
  7. Extended service areas
  8. Multi-BSS environments: "virtual APs"
  9. Robust security networks (RSNs)
  10. The Distribution System, Revisited
  11. Interaccess point communication as part of the distribution system
  12. Wireless bridges and the distribution system
  13. Network Boundaries
  14. 802.11 Network Operations
  15. Network Services
  16. Station services
  17. Distribution system services
  18. Confidentiality and access control
  19. Spectrum management services
  20. Mobility Support
  21. Designing Networks for Mobility