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CLI-based Configuration Guide - WLAN-AC

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides the concepts, configuration procedures, and configuration examples of WLAN-AC features.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring a Radio

Configuring a Radio

Configuring Basic Radio Parameters

Context

You need to configure different radio parameters for AP radios based on actual WLAN environments, enabling the AP radios to work at the optimal performance.

  • If working channels of adjacent APs have overlapping frequencies, signal interference occurs and affects AP working status. To prevent signal interference, enable APs to work in the optimal status, and improve the WLAN quality, configure any two adjacent APs to work on non-overlapping channels.

    Working channels of radios vary according to countries and regions. To conform to local laws and regulations, you need to configure different working channels under different country codes. You can run the display ap configurable channel { ap-name ap-name | ap-id ap-id } command to check the channels supported by the specified AP.

    The channels you configure must be supported by the terminals; otherwise, the terminals cannot discover wireless signals. For example, when the country code is set to China, 5 GHz channels 36, 40, 44, 48, 52, 56, 60, and 64 can be configured. However, most terminals do not support these channels currently. If these channels are configured, the terminals cannot discover wireless signals. In this case, you can configure 5 GHz channels 149, 153, 157, 161, and 165, which are supported by the terminals.

    If an AP detects radar signals on a channel, the channel cannot be configured as the radio channel of the AP in 30 minutes. However, the channel can be configured as the radio channel of other APs not detecting radar signals on it.

    It is laborious to manually configure working channels of radios, and difficult to maintain and modify the configuration. To facilitate configuration and maintenance, configure radio calibration to dynamically adjust working channels of radios. For details, see Configuring Radio Calibration.

  • Configure the transmit power and antenna gain for radios according to actual network environments so that the radios provide sufficient signal strength, improving signal quality of WLANs.

  • In actual application scenarios, two APs may be connected over dozens of meters to dozens of kilometers. Due to different AP distances, the time to wait for ACK packets from the peer AP varies. A proper acktimeout value can improve data transmission efficiency between APs.

  • Radio 0 of the AP2010DN and AP8130DN supports 2.4 GHz and 5 GHz frequency bands but can work on one frequency band at a time. You can configure the operating band of the AP based on the frequency band of STAs. If you configure radio 0 of the AP8130DN to work on the 5 GHz frequency band, the AP8130DN then works in dual-5G mode.

You can configure basic radio parameters in the AP group radio view and AP radio view. The configuration in the AP group radio view takes effect on all specified AP radios in an AP group and that in the AP radio view takes effect only on a specified AP radio. The configuration in the AP radio view has a higher priority than that in the AP group radio view.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run wlan ac

    The WLAN view is displayed.

  3. Enter the radio view.

    • Enter the AP group radio view.
      1. Run the ap-group name group-name command to enter the AP group view.
      2. Run the radio radio-id command to enter the radio view.
    • Enter the AP radio view.
      1. Run the ap-id ap-id, ap-mac ap-mac, or ap-name ap-name command to enter the AP view.
      2. Run the radio radio-id command to enter the radio view.

  4. Run channel { 20mhz | 40mhz-minus | 40mhz-plus | 80mhz | 160mhz } channel or channel 80+80mhz channel1 channel2.

    The working bandwidth and channel are configured for a radio.

    By default, the working bandwidth of a radio is 20 MHz, and no working channel is configured for a radio.

    To avoid signal interference, ensure that adjacent APs work in non-overlapping channels.

    The 80 MHz, 160 MHz, and 80+80 MHz working bandwidths are only supported in the 5G radio view.

    Currently, only the 5 GHz radio of the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN supports 80 MHz.

  5. Run antenna-gain antenna-gain

    The antenna gain is configured for the radio.

    By default, no antenna gain is configured for AP radios.

    The antenna gain is the ratio of the power density produced by an antenna to the power density that should be obtained at the same point if the power accepted by the antenna were radiated equally. It can measure the capability for an antenna to receive and send signals in a specified direction, which is one of the most important parameters to select a BTS antenna. In the same condition, if the antenna gain is high, the wave travels far.

    The antenna gain of an AP radio configured using the command must be consistent with the gain of the antenna connected to the AP.

    The maximum antenna gain should comply with laws and regulations of the corresponding country. For details, see the Country Code & Channel Compliance Table.

  6. Run eirp eirp

    The transmit power is configured for the radio.

    By default, the transmit power of a radio is 127 dBm.

    You can configure the transmit power for a radio based on actual network environments, enabling radios to provide the required signal strength and improving signal quality on WLANs.

  7. Run coverage distance distance

    The radio coverage distance parameter is specified.

    By default, the radio coverage distance parameter is 3 (unit: 100 m) for all radios.

    You can configure the radio coverage distance parameter based on distances between APs and the APs automatically adjust the values of slottime, acktimeout, and ctstimeout based on the configured distance parameter to improve data transmission efficiency.

  8. Run frequency

    Radio 0 is configured to work on the 5 GHz frequency band.

    By default, radio 0 works on the 2.4 GHz frequency band,and radio 2 work on the 5 GHz frequency band.

  9. (Optional) Run undo radio disable

    The radio is enabled.

    By default, all AP radios are enabled.

    A radio can work only after you enable it.

Creating a Radio Profile

Context

Basic radio parameters are directly configured on radio interfaces, while other radio parameters are configured in a radio profile. The radio profile is classified into the 2G and 5G radio profiles. The configurations in the 2G and 5G radio profiles take effect on 2.4 GHz and 5 GHz radios, respectively. The commands in the 2G radio profile are used to configure 2.4 GHz radio parameters while those in the 5G radio profile are used to configure 5 GHz radio parameters. (Optional) Adjusting Radio Parameters describes different commands used for the 2G and 5G radio profiles. Unless otherwise specified, the other commands are applicable to both the 2G and 5G radio profiles.

The 2.4 GHz radio supports the 802.11bgn radio mode, and the 5 GHz radio supports the 802.11an and 802.11ac radio modes. Currently, 802.11ac is supported only by the 5 GHz radio of the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN. When connecting to a wireless network, STAs automatically negotiate the radio mode with their connected APs.

By default, the system provides the 2G radio profile default and 5G radio profile default, and the two radio profiles are bound to all AP groups. Using the default radio profiles can simplify user operations. However, in actual scenarios, you are advised to create different radio profiles and configure parameters in the profiles according to service requirements.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run wlan ac

    The WLAN view is displayed.

  3. Run radio-2g-profile name profile-name or radio-5g-profile name profile-name

    A 2G or 5G radio profile is created and the radio profile view is displayed.

    By default, the system provides the 2G radio profile default and 5G radio profile default.

(Optional) Configuring Smooth Channel Switching

Context

When a STA associated with an AP detects a channel switching on the AP, the STA needs to reassociate with the AP on the new channel. During this process, services of the STA are interrupted, degrading Internet experience of users. After smooth channel switching is configured, when the AP channel needs to be switched, the AP requests STAs to switch the channel after a fixed number of Beacon intervals so that the STAs and AP switch the channel simultaneously. Smooth channel switching can prevent STA reassociations and ensure rapid service recovery to improve Internet experience of users.

The channel switching announcement function must be supported by both the AP and STA.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run wlan ac

    The WLAN view is displayed.

  3. Run radio-2g-profile name profile-name or radio-5g-profile name profile-name

    The 2G or 5G radio profile view is displayed.

  4. Run undo channel-switch announcement disable

    The channel switch announcement function is enabled.

    By default, the AP send an announcement when the channel is switched.

(Optional) Adjusting Radio Parameters

Context

You can adjust and optimize radio parameters to adapt to different network environments, enabling APs to provide required radio capabilities and improving signal quality of WLANs.

After parameters in a radio profile are delivered to an AP, only the parameters supported by the AP can take effect. For example, if beamforming is enabled in a radio profile and the configuration is delivered to the AP3010DN-AGN, the beamforming configuration does not take effect on the AP because the AP3010DN-AGN does not support the function.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run wlan ac

    The WLAN view is displayed.

  3. Run radio-2g-profile name profile-name or radio-5g-profile name profile-name

    The 2G or 5G radio profile view is displayed.

  4. Adjust radio parameters:

    Procedure

    Command

    Description

    Configure the radio type

    radio-type { dot11b | dot11g | dot11n }

    By default, the radio type in a 2G radio profile is dot11n.

    Usually, the default radio type is used and does not need to be modified. If the default radio mode cannot meet requirements or a fault needs to be located, configure the radio type as required.

    • The radio-type { dot11b | dot11g | dot11n } command can only be configured in a 2G radio profile.

    • The radio-type { dot11a | dot11ac | dot11n } command can only be configured in a 5G radio profile.

    radio-type { dot11a | dot11ac | dot11n }

    By default, the radio type in a 5G radio profile is dot11ac.

    Configure the radio rate

    dot11a basic-rate { dot11a-rate-value &<1-8> | all }

    By default, a basic rate set of the 802.11a protocol in a 5G radio profile includes rates 6 Mbps, 12 Mbps, and 24 Mbps.

    All rates specified in the basic rate set must be supported by both the AP and STA; otherwise, the STA cannot associate with the AP.

    • The dot11a basic-rate { dot11a-rate-value &<1-8> | all } command can only be configured in a 5G radio profile.

    • The dot11bg basic-rate { dot11bg-rate-value &<1-12> | all } command can only be configured in a 2G radio profile.

    dot11bg basic-rate { dot11bg-rate-value &<1-12> | all }

    By default, the basic rate set of the 802.11bg protocol includes rates 1 Mbps and 2 Mbps in a 2G radio profile.

    dot11a supported-rate { dot11a-rate-value &<1-8> | all }

    By default, the supported rate set of the 802.11a protocol in a 5G radio profile includes rates 6 Mbps, 9 Mbps, 12 Mbps, 18 Mbps, 24 Mbps, 36 Mbps, 48 Mbps, and 54 Mbps.

    The supported rate set contains rates supported by the AP, except the basic rates. The AP and STA can transmit data at all rates specified by the supported rate set.

    • The dot11a supported-rate { dot11a-rate-value &<1-8> | all } command can only be configured in a 5G radio profile.

    • The dot11bg supported-rate { dot11bg-rate-value &<1-12> | all } command can only be configured in a 2G radio profile.

    dot11bg supported-rate { dot11bg-rate-value &<1-12> | all }

    By default, the supported rate set of the 802.11bg protocol in a 2G radio profile includes rates 1 Mbps, 2 Mbps, 5.5 Mbps, 6 Mbps, 9 Mbps, 11 Mbps, 12 Mbps, 18 Mbps, 24 Mbps, 36 Mbps, 48 Mbps, and 54 Mbps.

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

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

    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.

    The MCS value can only be configured in a 5G radio profile. Currently, only the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN support 802.11ac.

    Configure the radio multicast rate

    multicast-rate multicast-rate

    By default, the multicast rate of wireless packets is 11 Mbps in a 2G radio profile and 6 Mbps in a 5G radio profile.

    The configured multicast rate must be in the basic rate set or supported rate set, and supported by the STA; otherwise, the STA cannot receive multicast data.

    The values of multicast-rate differ in 2G and 5G radio profiles. For details, see descriptions of multicast-rate multicast-rate.

    Configure the interval at which an AP sends Beacon frames

    beacon-interval beacon-interval

    By default, the interval for sending Beacon frames is 100 ms.

    An AP broadcasts Beacon frames at intervals to notify STAs of an existing 802.11 network.

    Configure an AP to support the short preamble

    undo short-preamble disable

    By default, a radio profile supports the short preamble.

    The preamble is a section of bits in the header of a data frame. It synchronizes signals transmitted between the sender and receiver and can be a short or long preamble.

    • A short preamble ensures better network synchronization performance and is recommended.
    • A long preamble is usually used for compatibility with earlier network adapters of clients.

    Configure the RTS mechanism

    Configure the RTS-CTS operation mode

    rts-cts-mode { cts-to-self | disable | rts-cts }

    By default, the RTS-CTS operation mode is cts-to-self.

    The RTS/CTS handshake mechanism prevents data transmission failures caused by channel conflicts. If STAs perform RTS/CTS handshakes before sending data, RTS frames consume high channel bandwidth. The default RTS-CTS operation mode is recommended.

    • If the RTS/CTS handshake mechanism is not used, there may be hidden STAs. If base stations A and C simultaneously send information to base station B because base station C does not know that base station A is sending information to base station B, signal conflict occurs. As a result, signals fail to be sent to base station B.
    • The RTS/CTS handshake mechanism reduces the transmission rate and even causes the network delay.
    Configure an RTS-CTS threshold in a radio profile

    rts-cts-threshold rts-cts-threshold

    The default RTS-CTS alarm threshold is 2347 bytes.

    If STAs perform RTS/CTS handshakes before sending data, many RTS frames consume high channel bandwidth. To prevent this problem, set the RTS threshold and maximum number of retransmission attempts for long/short frames. The RTS threshold specifies the length of frames to be sent. When the length of frames to be sent by a STA is smaller than the RTS threshold, no RST/CTS handshake is performed. The default RTS threshold is recommended.

    This configuration is applicable only when the RTS-CTS operation mode is rts-cts.

    Configure 802.11n parameters

    Enable the MAC Protocol Data Unit (MPDU) aggregation function.

    undo ht a-mpdu disable

    By default, aggregation of MPDUs is enabled.

    An 802.11 packet is sent as an MPDU, requiring channel competition and backoff and consuming channel resources. The 802.11n MPDU aggregation function aggregates multiple MPDUs into an aggregate MAC Protocol Data Unit (A-MPDU), so that N MPDUs can be transmitted through one channel competition and backoff. This function saves the channel resources to be consumed for sending N-1 MPDUs. The MPDU aggregation function improves channel efficiency and 802.11 network performance.

    Before configuring the length of an A-MPDU, run the undo ht a-mpdu disable command to enable the MPDU aggregation function.

    Configure the maximum length of an A-MPDU

    ht a-mpdu max-length-exponent max-length-exponent-index

    By default, the index for the maximum length of an A-MPDU is 3. The maximum length of the A-MPDU is 65535 bytes.

    Configure 802.11ac parameters

    Configure the maximum length of an A-MPDU

    vht a-mpdu max-length-exponent max-length-exponent-index

    By default, the index for the maximum length of an A-MPDU is 7. The maximum length of the A-MPDU is 1048575 bytes.

    An 802.11 packet is sent as an MPDU, requiring channel competition and backoff and consuming channel resources. The 802.11ac MPDU aggregation function aggregates multiple MPDUs into an aggregate MAC Protocol Data Unit (A-MPDU), so that multiple MPDUs can be transmitted through one channel competition and backoff. This function saves the channel resources to be consumed for sending multiple MPDUs. The MPDU aggregation function improves channel efficiency and 802.11 network performance.

    The length of an A-MPDU can only be configured in a 5G radio profile. Currently, only the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN support 802.11ac.

    Enable the function of sending 802.11ac packets in A-MSDU mode

    vht a-msdu enable

    By default, the function of sending 802.11 frames in A-MSDU mode is disabled.

    The function of sending 802.11 frames in A-MSDU mode can reduce MAC layer costs of the 802.11 packets and improve packet transmission efficiency especially when short MSDUs are aggregated.

    The function can only be configured in a 5G radio profile. Currently, only the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN support 802.11ac.

    Configure the maximum number of subframes that can be aggregated into an A-MSDU

    vht a-msdu max-frame-num max-frame-number

    By default, a maximum of two subframes can be aggregated into an A-MSDU at one time.

    A-MSDU technology aggregates multiple MSDUs into an MPDU to reduce the MAC layer cost of 802.11 packets.

    Before configuring the maximum number of subframes that can be aggregated into an A-MSDU, run the vht a-msdu enable command to enable the function of sending 802.11 packets in A-MSDU mode.

    The configuration can only be performed in a 5G radio profile. Currently, only the AP2030DN, AP3030DN, AP4030DN, AP4130DN, AP5030DN, , AP5130DN, AP7030DE, AP8030DN, AP8130DN and AP9330DN support 802.11ac.

    Configure the guard interval (GI) mode

    guard-interval-mode { short | normal }

    By default, the GI mode is normal.

    The GI mode is classified into the short GI and normal GI. The normal GI is 800 ns, and the short GI is 400 ns. The short GI is applicable to 802.11n and 802.11ac standards, which can raise the transmission rate of 802.11n and 802.11ac packets.

    Disable radios from sending packets at maximum power

    utmost-power disable

    By default, a radio can send packets at maximum power.

    The command takes effect only for the country code CN. You can use the command to configure a radio to send packets at maximum power supported by the radio or maximum power allowed by the country code. After a radio is disabled from sending packets at maximum power, the radio uses the maximum power allowed by the country code to send packets.

    Except the country code CN, a radio can only send packets using the maximum power allowed by the country codes.

Binding a Radio Profile

Context

After the configuration in a radio profile is complete, you need to bind the radio profile to an AP group, AP, AP radio, or AP group radioAfter being delivered to APs, the configuration in a radio profile can take effect on the APs.

After a radio profile is applied to an AP group or AP, the parameter settings in the profile take effect on all radios of the AP group or AP. After a radio profile is applied in the AP group radio or AP radio view, the parameter settings in the profile take effect on the specified AP radio or radios in the AP group. The configuration under an AP and AP radio has a higher priority than that under an AP group and AP group radio. The 2G and 5G radio profiles take effect on 2G and 5G radios, respectively.

Procedure

  • Bind a radio profile to an AP group.
    1. Run the system-view command to enter the system view.
    2. Run the wlan ac command to enter the WLAN view.
    3. Run the ap-group name group-name command to enter the AP group view.
    4. Run the radio-2g-profile profile-name { radio { radio-id | all } } or radio-5g-profile profile-name { radio { id | all } } command to bind the radio profile to the radio.

      By default, the 2G radio profile default and 5G radio profile default are bound to an AP group.

  • Bind a radio profile to an AP.
    1. Run the system-view command to enter the system view.
    2. Run the wlan ac command to enter the WLAN view.
    3. Run the ap-id ap-id, ap-mac ap-mac, or ap-name ap-name command to enter the AP view.
    4. Run the radio-2g-profile profile-name { radio { radio-id | all } } or radio-5g-profile profile-name { radio { id | all } } command to bind the radio profile to the radio.

      By default, no 2G radio profile or 5G radio profile is bound to an AP.

  • Apply a radio profile in the AP group radio view.
    1. Run the system-view command to enter the system view.
    2. Run the wlan ac command to enter the WLAN view.
    3. Run the ap-group name group-name command to enter the AP group view.
    4. Run the radio radio-id command to enter the radio view.
    5. Run the radio-2g-profile profile-name or radio-5g-profile profile-name command to bind the radio profile to the radio.

      By default, the 2G radio profile default and 5G radio profile default are bound to an AP group radio.

  • Apply a radio profile in the AP radio view.
    1. Run the system-view command to enter the system view.
    2. Run the wlan ac command to enter the WLAN view.
    3. Run the ap-id ap-id, ap-mac ap-mac, or ap-name ap-name command to enter the AP view.
    4. Run the radio radio-id command to enter the radio view.
    5. Run the radio-2g-profile profile-name or radio-5g-profile profile-name command to bind the radio profile to the radio.

      By default, no 2G radio profile and 5G radio profile are bound to an AP radio.

Verifying the Radio Configuration

Prerequisites

The radio profile configuration is complete.

Procedure

  • Run the display radio-2g-profile { all | name profile-name } command to check configuration and reference information about a 2G radio profile.
  • Run the display radio-5g-profile { all | name profile-name } command to check configuration and reference information about a 5G radio profile.
  • Run the display references radio-2g-profile name profile-name command to check reference information about a 2G radio profile.
  • Run the display references radio-5g-profile name profile-name command to check reference information about a 5G radio profile.
  • Run the display ap configurable channel { ap-name ap-name | ap-id ap-id } command to check configurable channels supported by an AP.
  • Run the display ap config-info { ap-name ap-name | ap-id ap-id } command to check the AP configuration.
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Updated: 2019-08-07

Document ID: EDOC1100033726

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