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Configuration Guide - WLAN-AC

S5700 and S6720 V200R012C00

This document describes the configurations of WLAN, including WLAN Service Configuration, Radio Resource Management, Roaming, WLAN QoS, WLAN Security, WDS, Mesh, Location, Hotspot 2.0, Dual-Link Cold Backup, N+1 Backup.
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Configuring Dynamic Load Balancing

Configuring Dynamic Load Balancing

Background

The load balancing function applies to scenarios where there is a high degree of overlap between APs' coverage ranges. If APs engaged in load balancing are far from each other, a STA may connect to a distant AP, which affects wireless experience of users.

When the load difference between APs reaches the load difference threshold, some STAs may access the network slowly because the APs will reject access requests of STAs according to the load balancing algorithm. If a STA continues sending association requests to an AP, the AP allows the STA to associate when the number of consecutive association attempts of the STA exceeds the maximum number of rejection times.

Static load balancing limits the maximum number of AP radios to 16 and allows only radios on the same frequency band to join a load balancing group. Additionally, a static load balancing group needs to be manually specified. Dynamic load balancing overcomes the limitations of static load balancing.

In dynamic load balancing mode, a STA broadcasts Probe Request frames to scan available APs. The APs that receive the Probe Request frames all report the STA information to the AC. The AC adds these APs to a load balancing group and then uses a load balancing algorithm to determine whether to permit access from the STA. If the RSSI threshold of member devices in a dynamic load balancing group is set, an AP compares the RSSI of a STA with the configured RSSI threshold after receiving the Probe Request packet sent by the STA. If the STA's RSSI exceeds the configured RSSI threshold, the AP reports the STA information to the AC, and the AP is added to the dynamic load balancing group. Otherwise, the AP directly filters the STA information and does not report the information to the AC, and the AP will not be added to the dynamic load balancing group.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run wlan

    The WLAN view is displayed.

  3. Run rrm-profile name profile-name

    An RRM profile is created and the RRM profile view is displayed.

  4. Run sta-load-balance dynamic enable

    Dynamic load balancing is enabled.

    By default, the dynamic load balancing function is disabled.

  5. (Optional) Configure the dynamic load balancing mode and related parameters.

    Configure dynamic load balancing based on the number of users and channel utilization.

    Configure dynamic load balancing based on the channel utilization.

    1. Run sta-load-balance mode channel-utilization

      Dynamic load balancing based on the channel utilization is configured.

      By default, dynamic load balancing based on the number of users is used.

    2. Run sta-load-balance dynamic channel-utilization start-threshold start-threshold

      The start threshold for dynamic load balancing based on the channel utilization is set.

      By default, the start threshold for dynamic load balancing based on the channel usage is 50%.

    3. Run sta-load-balance dynamic channel-utilization gap-threshold gap-threshold

      The channel utilization difference threshold for load balancing in a dynamic load balancing group is set.

      By default, the channel utilization difference threshold for load balancing in a dynamic load balancing group is 20%.

    4. Run sta-load-balance dynamic deny-threshold deny-threshold

      The maximum number of times an AP rejects association requests of a STA is configured for dynamic load balancing

    Configure dynamic load balancing based on the number of users.

    1. Run sta-load-balance mode sta-number

      Dynamic load balancing based on the number of users is configured.

      By default, dynamic load balancing based on the number of users is used.

    2. Run the sta-load-balance dynamic sta-number start-threshold start-threshold-value

      The start threshold for dynamic load balancing based on the number of users is set.

      By default, the start threshold for load balancing in a dynamic load balancing group is 10.

    3. Run sta-load-balance dynamic sta-number gap-threshold { percentage percentage-value | number number-value }

      The channel load difference threshold for load balancing in a dynamic load balancing group is set.

      By default, the load difference threshold of a dynamic load balancing group based on the percentage of users is 20%.

    4. (Optional) Run sta-load-balance dynamic rssi-threshold rssi-threshold

      The RSSI threshold of members in the dynamic load balancing group is configured.

      By default, the RSSI threshold of member devices in a dynamic load balancing group is –70 dBm.

  6. Run quit

    Return to the WLAN view.

  7. Bind the RRM profile to a radio profile.
    1. Run radio-2g-profile name profile-name or radio-5g-profile name profile-name

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

    2. Run rrm-profile profile-name

      The RRM profile is bound to the 2G or 5G radio profile.

    3. Run quit

      Return to the WLAN view.

  8. Bind the radio profile to an AP group or a specific AP. For the detailed procedure, see Binding a Radio Profile.

Verifying the Configuration

  • Run the display rrm-profile name profile-name command to check settings of dynamic load balancing parameters.
  • Run the display radio-2g-profile name profile-name command to check the RRM profile referenced by a 2G radio profile.
  • Run the display radio-5g-profile name profile-name command to check the RRM profile referenced by a 5G radio profile.
  • Run the display station load-balance sta-mac mac-address command to check information about the dynamic load balancing group of the specified STA.
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Updated: 2018-12-24

Document ID: EDOC1100038361

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