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WLAN V200R008C10 Typical Configuration Examples

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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).
Example for Configuring WMM and Priority Mapping

Example for Configuring WMM and Priority Mapping

Networking 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.

After accessing the network, users encounter poor experience in voice and video services. The administrator wants to preferentially ensure forwarding of voice and video service traffic to improve user experience.

Figure 5-62 Networking for configuring WMM and priority mapping

Data Planning

Table 5-69 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, and 5G radio profile wlan-radio5g
SSID profile
  • Name: wlan-net
  • EDCA parameters: specified to provide higher priorities for voice and video services
VAP profile
  • Name: wlan-net
  • Referenced profiles: SSID profile wlan-net and traffic profile wlan-traffic

2G radio profile

  • Name: wlan-radio2g

  • EDCA parameters: specified to provide higher priorities for voice and video services

5G radio profile

  • Name: wlan-radio5g

  • EDCA parameters: specified to provide higher priorities for voice and video services

Traffic profile

  • Name: wlan-traffic

  • Downstream mapping on the air interface: DSCP

  • Upstream tunnel mapping on the air interface: 802.11e

  • Priority mapping: specified to provide higher priorities for voice and video services

Configuration Roadmap

  1. Configure the WMM function so that network bandwidth is preferentially allocated to voice and video services at the wireless side.

  2. Configure priority mapping to ensure a higher priority of voice and video services so that network bandwidth is preferentially allocated to these services.

Configuration Notes

  • 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 the WMM function.
    1. In the radio profile, enable the WMM function and set EDCA parameters on APs to enable voice and video services to preferentially use network bandwidth.

      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. Click in front of Radio Management. Under it, click in front of Radio 0. Click 2G Radio Profile. The 2G Radio Profile page is displayed.

      # Enable the WMM function, select scenario Voice and video, and retain the default settings of EDCA parameters. Click Apply. In the dialog box that is displayed, click OK.

    2. In the SSID profile, enable the WMM function and set EDCA parameters on STAs to enable voice and video services to preferentially use network bandwidth.

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

      # In the AP group list, click ap-group1. Click in front of VAP Configuration. Under it, click in front of wlan-net. Click SSID Profile. The SSID Profile page is displayed.

      # Select scenario Voice and video and retain the default settings of EDCA parameters. Click Apply. In the dialog box that is displayed, click OK.

  2. Configuring priority mapping.

    This example requires that voice and video packets have the highest priority so that these packets are preferentially transmitted. By default, the uplink and downlink mapping modes on the air interface are 802.11e and DSCP, respectively. The uplink and downlink priority mapping on the air interface can ensure that voice and video packets have the highest tunnel DSCP priority. Therefore, you do not need to modify default priority mapping.

    To change the default priority mapping, for example, to enable video packets with a higher priority than voice packets, you can refer to this step.

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

    # In the AP group list, click ap-group1. Click in front of VAP Configuration. Under it, click in front of wlan-net. Click Traffic Profile. The Traffic Profile page is displayed.

    # Click Create. The Create Traffic Profile page is displayed.

    # Enter the traffic profile name wlan-traffic in Profile name and click OK. The parameter setting page of the new traffic profile is displayed.

    # Configure priority mapping and set the mapped priority of video packets higher than that of the voice packets.

    NOTE:

    By default, the user priority of voice packets is set to 6 or 7, and that of the video packets is set to 4 or 5.

    In the following figure, the DSCP priorities of video packets are 48 and 56, and those of the voice packets are 32 and 40. Based on the settings, video packets will be preferentially transmitted.



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

  3. Verify the configuration.
    1. Normal voice and video communication improves user experience in voice and video services.

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Updated: 2019-03-30

Document ID: EDOC1000184389

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