Fortinet FAP-U43 F Series, Deployment Manual

Page: 12 / 32

Security Profiles 6
•
(ARRP disabled) Maximum number of clients supported – 170 clients/radio
The actual number of clients recommended per radio depends on number and types of appli-
cations in use, SLAs, client types, etc.
Security Profiles
To ensure that you are benefiting from the VHT data rates available in 11ax, your security pol-
icies need to be configured to use WPA2 with AES-CCMP. The AES-CCMP requirement is
part of the 11ax specification.
Signal Strength
The recommendation for 11n networks is typically that AP signal strength be -65 dBm or
greater everywhere that Wi-Fi service is required for voice or video. This recommendation is
influenced by the knowledge that 11n uses highest modulation rate of 64-QAM.
With 11ax/ac, a higher signal strength is required to achieve the highest modulation rate of
1024-QAM. This is because 256 and 1024-QAM employs a much denser constellation than
64-QAM, which makes data corruption more likely at lower signal strength when using 256
and 1024-QAM. How much higher signal strength is required depends mainly on channel
width. Wider channels will require higher signal strengths to achieve 1024-QAM rates.
For networks using 80 MHz channels, the widest channel width used in Wave 2 APs, a signal
strength of approximately -51 dBm or greater is required to support 1024-QAM. For 40 MHz
channels, a signal strength of approximately -54 dBm or greater is required to support 1024-
QAM.
Modulation Scheme 40Mhz 80MHz 160MHz
11n 64-QAM -61 NA
11ax 256-QAM -54dBm -51dBm
11ax 1024-QAM -45dBm