Configuring UNII-4 5GHz radio bands

FortiAP G-series models operating in Single 5G mode can make use of the UNII-4 frequency band. The 5.85 GHz-5.925 GHz channels of "169", "173", and "177" become available when configuring the 5GHz radio.

There are a few important points to note about UNII-4 band usage:

1. UNII-4 5GHz channels are not available when operating in Dual 5G platform mode.
2. Not all countries allow UNII-4 band usage.
3. For APs operating in Single 5G platform mode, note the following behavior changes based on Dedicated scan:

   • When Dedicated scan is enabled, UNII-4 5 GHz channels are available by default. Radio 3 does not work in AP mode and Radio 2 can utilize all UNII-4 5GHz channels.

   • When Dedicated scan is disabled, you are given an option to enable or disable UNII-4 5GHz.

By default, FortiAP G-series models support UNII-4 5GHz channels when operating in Single 5G mode with Dedicated scan enabled; there is no need to configure anything. You can immediately select channels "169", "173", and "177" when configuring the 5GHz radio.

To configure UNII-4 5GHz band channels when the FortiAP is running in Single 5G mode with Dedicated scan disabled - GUI:

1. From the FortiGate GUI, navigate to WiFi & Switch Controller > FortiAP Profiles.
2. Select if you want to create a new profile or edit an existing FAP-43xG profile.
3. Set the Platform mode to Single 5G.
4. Disable Dedicated scan.

5. Enable UNII-4 5GHz band channels.

   

6. Go to Radio 2 and click Set Channels and select which channels you want to use.

   In the Set Channels window, you can see new channels "169", "173", and "177" under the UNII-4 category.

   

   Note: Enabling UNII-4 5GHz band channels will cause the UNII-5 and UNII-6 Channels to be disabled on Radio 3.

   

To configure UNII-4 5GHz band channels when the FortiAP is running in Single 5G mode with Dedicated scan disabled - CLI:

1. When DDSCAN is disabled, you can configure the new set unii-4-5ghz-band command in FAP-431G or FAP-433G wtp-profiles.

   config wireless-controller wtp-profile
     edit FAP_G
       config platform
         set  431G
       end
       set unii-4-5ghz-band ?
         enable     Enable UNII-4 5Ghz band channels.
         disable    Disable UNII-4 5Ghz band channels.

2. When you select enable, the following notification shows:

   set unii-4-5ghz-band enable
     Enabling UNII-4 will reset radio-3 channel lists, UNII-5 and UNII-6 channels will be unavailable
     Do you want to continue? (y/n)

3. Enter y to continue. The UNII-4 5Ghz channels become available under radio-2.

   config  radio-2
     set channel
     *wireless_channel    <36,40,44,48,149,153,157,161,165,169,173,177>

   Note: Enabling UNII-4 5GHz band channels will cause the UNII-5 and UNII-6 Channels to be disabled on radio-3.