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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 a CCA Threshold

Configuring a CCA Threshold

Pre-configuration Tasks

Before configuring a CCA threshold, complete the following task:


The CCA mechanism enables a WLAN chip to determine whether the channel is idle before transmitting signals to the air interface. If so, the chip transmits signals. If not, the chip waits until the channel is idle.

The CCA threshold is used by a WLAN chip to determine whether the channel is idle. If the noise on the channel exceeds the threshold, the chip considers the channel busy. Otherwise, the chip considers the channel idle.

When deploying a WLAN, set a proper CCA threshold to reduce signal interference and improve the channel reuse rate.
  • If APs densely are deployed, a high CCA threshold is recommended to narrow down the coverage and skip remote weak signals.
  • If APs are sparsely deployed, a low CCA threshold is recommended to maximize the effective coverage of signals.


  1. Run system-view

    The system view is displayed.

  2. Run wlan

    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 cca-threshold cca-threshold

    A CCA threshold is configured.

    By default, no CCA threshold is specified. APs use the default CCA threshold of the chip.
    This command takes effect only on the AD9430DN-12 (including matching RUs), AD9430DN-24 (including matching RUs), AD9431DN-24X (including matching RUs), AP1050DN-S, AP2030DN, AP2050DN, AP2050DN-S, AP2050DN-E, AP2051DN, AP2051DN-E, AP3030DN, AP4030DN, AP4130DN, AP4030DN-E, AP4030TN, AP4050DN-E, AP4050DN-HD, AP4050DN, AP4050DN-S, AP4051DN, AP4151DN, AP4051DN-S, AP4051TN, AP430-E, AP5030DN, AP5030DN-S, AP5130DN, AP6050DN, AP6150DN, AP6052DN, AP7050DN-E, AP7050DE, AP7052DN, AP7152DN, AP7052DE, AP8030DN, AP8130DN, AP8130DN-W, AP8050DN, AP8150DN, AP8050DN-S, AP8050TN-HD, AP8082DN, AP8182DN, AP9131DN, AP9132DN, and AP9330DN.

  5. Run quit

    Return to the WLAN view.

  6. 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 radio-2g-profile name profile-name command to check the CCA threshold for APs in a 2G radio profile.
  • Run the display radio-5g-profile name profile-name command to check the CCA threshold for APs in a 5G radio profile.
Updated: 2018-12-24

Document ID: EDOC1100038361

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