sfn-roam roam-check low-threshold

Function

The sfn-roam roam-check low-threshold command sets the lower RSSI threshold for agile distributed SFN roaming.

The undo sfn-roam roam-check low-threshold command restores the default lower RSSI threshold for agile distributed SFN roaming.

By default, the lower RSSI threshold for agile distributed SFN roaming is -60 dBm.

Format

sfn-roam roam-check low-threshold low-threshold-value

undo sfn-roam roam-check low-threshold

Parameters

Parameter	Description	Value
low-threshold-value	Specifies the lower RSSI threshold for agile distributed SFN roaming.	The value is an integer that ranges from -70 to -55, in dBm.

Views

RRM profile view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can set the STA RSSI threshold to control the sensitivity of agile distributed SFN roaming and prevent STAs from frequently roaming at radio borders of RUs. A roaming switchover occurs when the total number of records in the following conditions exceeds the value specified by the sfn-roam roam-check better-times command:

When the HAP detects that the STA RSSI is lower than the lower threshold: The central AP makes a record if the SNR of the FAP is higher than that of the HAP.
When the HAP detects that the STA RSSI is between the upper and lower thresholds: The central AP makes a record if the SNR of the FAP is 3 dB higher than that of the HAP.
When the HAP detects that the STA RSSI is higher than the upper threshold: The central AP makes a record if the SNR of the FAP is 5 dB higher than that of the HAP.

Precautions

The lower RSSI threshold for agile distributed SFN roaming must be no higher than the upper threshold.

Example

# Set the lower RSSI threshold for agile distributed SFN roaming to -65 dBm.

<HUAWEI> system-view
[HUAWEI] wlan 
[HUAWEI-wlan-view] rrm-profile name wlan-rrm
[HUAWEI-wlan-rrm-prof-wlan-rrm] sfn-roam roam-check low-threshold -65