WiFi QoS Enhancement

This feature enables FortiGate to preserve the WiFi Multi-Media (WMM) QoS marking of packets by translating them to Differentiated Services Code Point (DSCP) values when forwarding upstream.

The following QoS profile commands are added to the CLI:

wmm-dscp-marking	Enable/disable WMM Differentiated Services Code Point (DSCP) marking (default = disable).
wmm-vo-dscp	DSCP marking for voice access (default = 48).
wmm-vi-dscp	DSCP marking for video access (default = 32).
wmm-be-dscp	DSCP marking for best effort access (default = 0).
wmm-bk-dscp	DSCP marking for background access (default = 8).

This feature requires a FortiAP-S or FortiAP-W2 device.

To configure WMM QoS marking of packets:

1. Create a QoS profile with wmm-dscp-marking enabled, and modify the wmm-dscp settings:

   config wireless-controller qos-profile
       edit qos-wifi
           set wmm-dscp-marking enable
           set wmm-vo-dscp 44
           set wmm-vi-dscp 24
           set wmm-be-dscp 12
           set wmm-bk-dscp 6
   end

2. Select the QoS profile on a VAP interface:

   config wireless-controller vap
       edit "stability3"
           set qos-profile "qos-wifi"
       next
   end

3. Verify that the wmm-dscp-marking values are pushed on FortiAP:

   cw_diag -c k-qos wlan00
   WLAN Kernel QoS Settings
   ..
   ....
   WLAN wlan00 :
       wmm                         : 1
       wmm uapsd                   : 1
       call admission control      : 0
       call capacity               : 0
       bandwidth admission control : 0
       bandwidth capacity          : 0
       dscp mapping                : 0
       dscp marking                : 1
            vo dscp                : 44
            vi dscp                : 24
            be dscp                : 12
            bk dscp                : 6

4. Verify that, when sending traffic from a client with a WMM setting of VO, the FortiGate receives the packets with a DSCP TID value or 44:

   

5. Verify that, when sending traffic from a client with a WMM setting of VI, the FortiGate receives the packets with a DSCP TID value or 24:

   

6. Verify that, when sending traffic from a client with a WMM setting of BE, the FortiGate receives the packets with a DSCP TID value or 12:

   

7. Verify that, when sending traffic from a client with a WMM setting of BK, the FortiGate receives the packets with a DSCP TID value or 6: