The vht mcs-map command configures the maximum number of spatial streams and the maximum MCS value supported by 802.11ac in the 5G radio profile.
The undo vht mcs-map command restores the default configuration.
By default, the maximum number of spatial streams and the maximum MCS value are not specified in the 5G radio profile.
Parameter |
Description |
Value |
|---|---|---|
nss nss-value |
Specifies the maximum number of available spatial streams. |
The value is an integer ranging from 1 to 8. |
max-mcs max-mcs-value |
Specified the maximum MCS value that can be negotiated for spatial streams. |
The value is an integer ranging from 7 to 9. |
Usage Scenario
Rates of 802.11ac APs depend on the index value of MCS. A larger MCS value indicates a higher transmission rate.
When nss-value is greater than or equal to the maximum number of spatial streams supported by an AP, the number of available spatial streams is the same as the maximum number of spatial streams supported by the AP.
When nss-value is smaller than the maximum number of spatial streams supported by an AP, the number of available spatial streams is the same as nss-value and remaining spatial streams do not take effect.
For example, if nss-value is set to 2 and the AP supports a maximum of 3 spatial streams, the maximum number of available spatial streams on the AP is 2.
Precautions
The following configurations take effect in descending order of priority: Reliability-first service guarantee mode configured using the service-guarantee reliability-first command in the SSID profile > Number of spatial streams and MCS value configured using the vht mcs-map (SSID Profile) command in the SSID profile > Number of spatial streams and MCS value configured using the vht mcs-map command in the 5G radio profile.
This configuration takes effect only when the AP communicates with STAs through 802.11ac and 802.11ax.