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S12700 V200R013C00 Command Reference

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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vht mcs-map

vht mcs-map

Function

The vht mcs-map command configures the maximum MCS value corresponding to a specific number of 802.11ac spatial streams in the 5G radio profile.

The undo vht mcs-map command restores the default maximum MCS value corresponding to a specific number of 802.11ac spatial streams in the 5G radio profile.

By default, the maximum MCS value of the 802.11 ac radios is 9 in the 5G radio profile.

Format

vht mcs-map nss nss-value max-mcs max-mcs-value

undo vht mcs-map

Parameters

Parameter

Description

Value

nss nss-value Specifies the number of spatial streams. The value is an integer ranging from 1 to 8.
max-mcs max-mcs-value Specifies the maximum MCS value corresponding to a specific number of spatial streams. The value is an integer ranging from 7 to 9.

Views

5G radio profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Rates of 802.11ac radios depend on the index value of Modulation and Coding Scheme (MCS). A larger MCS value indicates a higher transmission rate.

  • If nss-value is equal to or larger than the actual number of spatial streams supported by an AP, the maximum MCS value corresponding to all spatial streams of the AP is max-mcs-value.

  • If nss-value is smaller than the actual number of spatial streams supported by an AP, only the maximum MCS value of configured spatial streams is max-mcs-value. The maximum MCS value of the other spatial streams does not take effect.

    For example, if nss-value is 2, and the AP supports 3 spatial streams. Only the maximum MCS value of spatial stream 1 and spatial stream 2 is max-mcs-value, and that of spatial stream 3 does not take effect.

Precautions

This configuration applies only to STAs associated with an AP in 802.11ac mode but does not take effect on STAs associated with the AP in other modes.

  • Only the 802.11ac wave2 APs support MU-MIMO on 5 GHz radios.

  • In WDS scenarios, ensure that the number of spatial streams on STA VAPs is smaller than that on AP VAPs. Otherwise, MU-MIMO cannot take effect. For example, if STA VAPs and AP VAPs are both configured with three spatial streams, an AP VAP can communicate with only one STA VAP even if MU-MIMO has been enabled.

  • MU-MIMO is not supported on a Mesh network.

Example

# Configure the maximum MCS value 8 for 802.11ac radios with two spatial streams in the 5G radio profile.

<HUAWEI> system-view
[HUAWEI] wlan 
[HUAWEI-wlan-view] radio-5g-profile name default
[HUAWEI-wlan-radio-5g-prof-default] vht mcs-map nss 2 max-mcs 8
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Updated: 2019-04-09

Document ID: EDOC1100065659

Views: 126494

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