FortiAP
FortiAP devices are thin wireless access points (AP) supporting the latest Wi-Fi technologies (multi-user MIMO 802.11ac Wave 1 and Wave 2, 4x4), as well as 802.11n, 802.11AX , and the demand for plug and play deployment.
laltuzar
Staff
Staff
Article Id 325515
Description This article describes how to configure RX-SOP on FortiAPs.
Scope FortiAPs
Solution

RX-SOP is an advanced feature called 'Radio sensitivity' on SSID advanced configurations.

RX-SOP determines the threshold where the FortiAP will start to demodulate and decode packets. The FortiAP would start ignoring 802.11 signals that exceed the threshold, without informing the STAs that the AP would not be listening to them, even when the FortiAP is sensed with good signal, modulation.

This is why it is necessary to proceed with caution and should not be enabled as a first solution. Instead, try to decrease the cell size by decreasing the Tx power of the radios individually, enabling 'probe-resp-suppresion', and/or enabling sticky-client-remove to avoid providing service to distant or weak clients.

This feature is especially useful in high-density environments where many clients are connected to one FortiAP or ambients where there is a very high rate of multipath signals.

 

It is possible to enable this configuration through CLI or GUI (must enable advanced wireless features first). To define the threshold,  enter the commands manually on FortiGate's CLI:

 

Warning:

This feature is disabled by default and should not be enabled unless having already contacted a wireless expert or Fortinet Support. By enabling this feature, unwanted connectivity issues might occur. This feature should not be enabled as a first-step solution to decrease the cell size. Instead, try decreasing the TX power of the radios individually, enabling probe-resp-suppression, and/or enabling sticky-client-remove to avoid providing service to distant or weak clients Please proceed with caution.

 

  • Default configuration example:

 

FortiGate:

 

config wireless-controller vap
  edit "bridge"
    set radio-sensitivity disable
  next
end

 

FortiAP:

 

FAP-431-LAB # vcfg
-------------------------------VAP Configuration 1----------------------------
Radio Id 1 WLAN Id 0 fortinet-bridge ADMIN_UP(INTF_UP) init_done 0.0.0.0/0.0.0.0 unknown (-1)
...
rx sop=disabled

 

  • Enabling RX-SOP.

 

FortiGate:

 

config wireless-controller vap
  edit "bridge"
    set radio-sensitivity enable
    set radio-5g-threshold "-76" <--- Default value
    set radio-2g-threshold "-79" <--- Default value
  next
end

 

FortiAP:

 

FAP-431-LAB # vcfg
-------------------------------VAP Configuration 1----------------------------
Radio Id 1 WLAN Id 0 fortinet-bridge ADMIN_UP(INTF_UP) init_done 0.0.0.0/0.0.0.0 unknown (-1)
...
rx sop=enabled, rx_5g_threshold=-76dBm, rx_2g_threshold=-79dBm

 

  • Configured radio sensitivity example.

 

FortiGate:

 

config wireless-controller vap
  edit "bridge"
    set radio-sensitivity enable
    set radio-5g-threshold "-73"
    set radio-2g-threshold "-73"
  next
end

 

FortiAP:

 

FAP-431-LAB # vcfg
-------------------------------VAP Configuration 1----------------------------
Radio Id 1 WLAN Id 0 fortinet-bridge ADMIN_UP(INTF_UP) init_done 0.0.0.0/0.0.0.0 unknown (-1)
...
rx sop=enabled, rx_5g_threshold=-73dBm, rx_2g_threshold=-73dBm

 

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