No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

WLAN V200R008C10 Typical Configuration Examples

Rate and give feedback:
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).
Example for Configuring Spectrum Analysis

Example for Configuring Spectrum Analysis

Service Requirements

Enterprise users can access the network through WLANs, which is the basic requirement of mobile office. Furthermore, users' services are not affected during roaming in the coverage area. The enterprise is located in an open place, and the WLAN is vulnerable to interference. When discovering severe interference on the WLAN, the network administrator can detect whether non-Wi-Fi interference exists on the WLAN through the spectrum analysis function.

Networking Requirements

Figure 5-58 Networking for configuring spectrum analysis

Data Planning

Table 5-65 AC data planning

Item

Data

AP group
  • Name: ap-group1
  • Referenced profiles: VAP profile wlan-net, regulatory domain profile default, 2G radio profile wlan-radio2g, 5G radio profile wlan-radio5g, and AP system profile wlan-spectrum

Air scan profile

  • Name: wlan-airscan

  • Air scan interval: 8000 ms
  • Air scan duration: 100 ms

2G radio profile

  • Name: wlan-radio2g

  • Referenced profiles: air scan profile wlan-airscan

5G radio profile

  • Name: wlan-radio5g

  • Referenced profiles: air scan profile wlan-airscan

AP system profile
  • Name: wlan-spectrum
  • IP address of the spectrum server: 10.137.43.4
  • Port number of the spectrum server: 32181
  • Port number used by the AC to receive spectrum information (encapsulated in UDP packets) from APs when the AC is used to send data to the spectrum server: 5001
  • Aging time of non-Wi-Fi devices on an AC during spectrum analysis: 5 minutes

Configuration Roadmap

Configure spectrum analysis so that the APs can detect non-Wi-Fi devices and send alarms to the AC.

Configuration Notes

  • If air scan related functions are enabled for a radio in normal mode, such as WIDS, spectrum analysis, and terminal location, the radio transmits common WLAN service data and provides the monitoring function that may affect transmission of common WLAN service data.
  • In spectrum analysis scenarios, to obtain enough sampling data, it is recommended that the scanning interval be set no more than 10 seconds and the scanning duration to 100 ms.
  • The channels to be scanned for spectrum analysis are fixed as all channels supported by the corresponding country code of an AP and are irrelevant to the configuration in an air scan profile.
  • No ACK mechanism is provided for multicast packet transmission on air interfaces. In addition, wireless links are unstable. To ensure stable transmission of multicast packets, they are usually sent at low rates. If a large number of such multicast packets are sent from the network side, the air interfaces may be congested. You are advised to configure multicast packet suppression to reduce impact of a large number of low-rate multicast packets on the wireless network. Exercise caution when configuring the rate limit; otherwise, the multicast services may be affected.
    • In direct forwarding mode, you are advised to configure multicast packet suppression on switch interfaces connected to APs.
    • In tunnel forwarding mode, you are advised to configure multicast packet suppression in traffic profiles of the AC.
    For details on how to configure traffic suppression, see How Do I Configure Multicast Packet Suppression to Reduce Impact of a Large Number of Low-Rate Multicast Packets on the Wireless Network?.
  • Configure port isolation on the interfaces of the device directly connected to APs. If port isolation is not configured and direct forwarding is used, a large number of unnecessary broadcast packets may be generated in the VLAN, blocking the network and degrading user experience.

  • In tunnel forwarding mode, the management VLAN and service VLAN cannot be the same. Only packets from the management VLAN are transmitted between the AC and APs. Packets from the service VLAN are not allowed between the AC and APs.

Procedure

  1. Configure spectrum analysis.
    1. Set spectrum analysis parameters.

      # Choose Configuration > AP Config > AP Group > AP Group.

      # In the AP group list, click ap-group1. Choose AP > AP System Profile. The AP System Profile page is displayed.

      # Click Create. The Create AP System Profile page is displayed. Enter the profile name wlan-spectrum and click OK. On the ap system profile configuration page that is displayed, set related parameters.

      # Click Apply. In the dialog box that is displayed, click OK.

    2. Create radio profiles.

      NOTE:

      The following example configures a 2G radio profile. The configuration of a 5G radio profile is similar.

      # Choose Configuration > AP Config > AP Group > AP Group.

      # In the AP group list, click ap-group1. Choose Radio Management > Radio 0 > 2G Radio Profile. The 2G Radio Profile page is displayed.

      # Click Create. On the Create 2G Radio Profile page that is displayed, enter the profile name wlan-radio2g and click OK. The 2G radio profile configuration page is displayed.

      # Click Apply. In the dialog box that is displayed, click OK.

    3. Create an air scan profile and configure the scan channel set, scan interval, and scan duration.

      # Choose 2G Radio Profile > Air Scan Profile. The Air Scan Profile page is displayed. Click Create. On the Create Air Scan Profile page that is displayed, enter the profile name wlan-airscan and click OK. The air scan profile configuration page is displayed.

      # Enable scanning, and configure the scan channel set, scan interval, and scan duration.

      # Click Apply. In the dialog box that is displayed, click OK.

    4. Enable spectrum analysis on a radio.

      # Click Radio 0. On the Radio 0 Settings(2.4G) page that is displayed, set the radio parameters.

      # Click Apply. In the dialog box that is displayed, click OK. The 5G radio configuration is similar and not mentioned here.

  2. Verify the configuration.
    1. View AP spectrum on the web platform to learn AP channel interference in deployment sites.

      1. Choose Monitoring > Spectrum Analysis. The Radio List page is displayed.



      2. Select an AP and click Start.

      3. In the AP radio list, click View Drawing in the Operation column. The related spectrum charts are displayed. A maximum of four spectrum charts can be displayed.



      4. Select your desired spectrum chart from the drop-down list box in the upper left corner. You can select Lower or Upper on the spectrum charts of a 5G radio to view spectrum charts of different frequencies.

      5. The Real-Time FFT chart shows that the signal strength of interference is mostly within the range of -80 dBm to -40 dBm. On the Swept Spectrogram chart, click Modify, set the signal strength scope at both ends of the color bar, and click Apply. The Swept Spectrogram chart shows that channel 149 has the most severe interference.
      6. On the Active Devices chart, click . A list of the detected non-Wi-Fi devices is displayed.



Translation
Download
Updated: 2019-03-30

Document ID: EDOC1000184389

Views: 91187

Downloads: 460

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next