Configuring WMM

Context

Adjust WMM parameter settings as follows:

Manual adjustment: You can manually adjust EDCA parameter settings and ACK policies for APs and STAs.
Automatic adjustment: After multimedia air interface optimization is enabled, the system automatically adjusts EDCA parameter settings and ACK policies for APs and STAs.

For details about the configuration for automatic adjustment, see Configuring Multimedia Air Interface Optimization.

Pre-configuration Tasks

Before configuring WMM, perform the task of WLAN Service Configuration Guide.

Procedure

Run system-view
The system view is displayed.
Run wlan
The WLAN view is displayed.
Run radio-2g-profile name profile-name or radio-5g-profile name profile-name
The 2G or 5G radio profile view is displayed.
Run undo wmm disable
WMM is enabled.

By default, WMM is enabled.

802.11ax, 802.11ac, and 802.11n STAs must support WMM. If the WMM function is disabled in a radio, 802.11ax, 802.11ac, and 802.11n cannot work and STAs can access the network only in 802.11a/b/g mode.

If the WMM function is disabled, the access of non-HT STAs fails to be denied.
(Optional) Run wmm mandatory enable
STAs that do not support WMM are forbidden to connect to a WMM-enabled AP.

By default, STAs that do not support WMM are allowed to connect to a WMM-enabled AP.

On a WLAN, wireless channels are open and all STAs have an equal chance to occupy the wireless channels. You can configure WMM to assign different priorities to packets and enable high-priority packets to preferentially use wireless channel resources, meeting differentiated service requirements. You can also disable STAs that do not support WMM from connecting to a WMM-enabled AP, which prevents those STAs from preempting channels of WMM-capable STAs.

Run wmm edca-ap { ac-vo | ac-vi | ac-be | ac-bk } { aifsn aifsn-value | ecw ecwmin ecwmin-value ecwmax ecwmax-value | txoplimit txoplimit-value | ack-policy { normal | noack } } ^*

EDCA parameters and ACK policies are set for APs.

Table 1 lists the default EDCA parameter settings and ACK policies for APs.

**Table 1** Default EDCA parameter settings and ACK policies for APs
Packet Type	ECWmax	ECWmin	AIFSN	TXOPLimit	ACK Policy
AC_VO	3	2	1	47	normal
AC_VI	4	3	1	94	normal
AC_BE	6	4	3	0	normal
AC_BK	10	4	7	0	normal

As shown in the table, queues of AC_VO, AC_VI, AC_BE, and AC_BK are in descending order of priority.

After the high-density function is enabled on an AP, the AP will optimize EDCA parameters of AC_BE packets, for example, adjusting the contention window size. In this way, the probability of user collisions will be reduced, and users can enjoy better service experience in high-density scenarios. If you configure EDCA parameters in the WMM profile on the AP, the configuration does not take effect on AC_BE packets.

Run quit
Return to the WLAN view.
Run ssid-profile name profile-name
The SSID profile view is displayed.
Run wmm edca-client { ac-vo | ac-vi | ac-be | ac-bk } { aifsn aifsn-value | ecw ecwmin ecwmin-value ecwmax ecwmax-value | txoplimit txoplimit-value } ^*
EDCA parameters are set for STAs.

Table 2 lists the default EDCA parameter settings for STAs.
Table 2 Default EDCA parameter settings for STAs
Packet Type

ECWmax

ECWmin

AIFSN

TXOPLimit

AC_VO

3

2

2

47

AC_VI

4

3

2

94

AC_BE

10

4

3

0

AC_BK

10

4

7

0

As shown in the table, queues of AC_VO, AC_VI, AC_BE, and AC_BK are in descending order of priority.

**Table 2** Default EDCA parameter settings for STAs
Packet Type	ECWmax	ECWmin	AIFSN	TXOPLimit
AC_VO	3	2	2	47
AC_VI	4	3	2	94
AC_BE	10	4	3	0
AC_BK	10	4	7	0

Verifying the Configuration

Run the display radio-5g-profile name profile-name or display radio-2g-profile name profile-name command to check the WMM configuration in a radio profile.
Run the display ssid-profile name profile-name command to check the WMM configuration in an SSID profile.