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WLAN V200R008C10 Typical Configuration Examples

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Example for Configuring Smart Roaming

Example for Configuring Smart Roaming

Networking Requirements

To ensure optimal user experience, a stadium requires that users associate with the nearest APs when moving on the stadium stand. Furthermore, users' services are not affected during roaming in the coverage area.

Figure 5-57 Networking for configuring smart roaming

Data Planning

Table 5-64 AC data planning



RRM profile
  • Name: wlan-rrm

  • Smart roaming threshold type: SNR-based
  • SNR threshold for smart roaming: 15
2G radio profile
  • Name: wlan-radio2g

  • Referenced profile: RRM profile wlan-rrm

5G radio profile
  • Name: wlan-radio5g

  • Referenced profile: RRM profile wlan-rrm

Configuration Roadmap

Configure smart roaming and proper smart roaming parameters to forcibly disconnect weak-signal users (especially sticky terminals) so that the users can reconnect or roam to APs with strong signals.


Some terminals on live networks have low roaming aggressiveness. As a result, they stick to the initially connected APs regardless of whether they move far from the APs, and have weak signals or low rates. The terminals fail to roam to neighbor APs with better signals. They are called sticky terminals.

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.


  1. Check the basic configuration of the WLAN.
    1. Choose Configuration > AP Config > AP Group > AP Group, and confirm that the AP group ap-group1 already exists.
    2. Click ap-group1. Choose VAP Configuration, confirm that the VAP profile wlan-net already exists, and check all referenced profiles.
  2. Configure smart roaming.
    1. In the RRM profile wlan-rrm, enable smart roaming, configure SNR-based and rate-based roaming trigger modes and their roaming thresholds to 30 dB and 30%, respectively.

      # Choose Radio Management > Radio 0 > 2G Radio Profile > RRM Profile. Click Create. The Create RRM Profile page that is displayed

      # Enter the profile name wlan-rrm and click OK. The RRM Profile page is displayed.

      # In the RRM profile, enable smart roaming, configure SNR-based roaming trigger mode and roaming threshold to 15 dB.

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

      # Choose Radio Management > Radio 1 > 5G Radio Profile > RRM Profile > wlan-rrm. The RRM Profile page is displayed. Configure smart roaming for radio 1. The configuration is similar to that of radio 0 and is not mentioned here.

  3. Verify the configuration.

    When a large number of users in the stadium access the WLAN, they can still enjoy good Internet experience.

Updated: 2019-03-30

Document ID: EDOC1000184389

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