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Difference between Spilt Mac and Local Mac architecture


Can someone explain to me the difference between Split mac and Local Mac architecture.

And of course if you have some documentation on it, I'll take with pleasure.

Thank you.


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Cisco Employee

Re: Difference between Spilt Mac and Local Mac architecture

Two types of MAC implementations are possible with Fit APs, known as the Local MAC and the Split MAC architectures. Local MAC is where all the wireless MAC functions are performed at the AP. The  complete 802.11 MAC functions, including management and control frame  processing, are resident on the APs. These functions include time-sensitive functions (also  known as Real Time MAC functions).

The Split MAC architecture divides the implementation of the  MAC functions between the AP and the controller. The real-time MAC  functions include functions such as beacon generation, probe transmission and  response, control frame processing (for example Request to Send and Clear to        Send—RTS and CTS), retransmission, and so on. The non-real  time functions include authentication and deauthentication; association  and reassociation; bridging between Ethernet and Wireless LAN; fragmentation; and so  on.

Vendors differ in the type of functions that are split between  the AP and the controller, and in some cases, even about what  constitutes real time. One common implementation of a Fit AP involves local MAC at the AP and  control and management functions at the AP.

split mac

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