General troubleshooting for unstable wireless SSID signals.

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During the use of WLAN, it is sometimes possible for the wireless clients (STA) to experience signal fluctuations between strong and weak, or even intermittent signal loss during the search process.

1. Check the engineering connections.

Engineering inspections should confirm the connection between the AP and feeder, feeder and antenna, network cable, etc. The hardware specification inspection part is not discussed here.

2. Software optimization configuration.

In "general optimization," the following functions restore the default configuration, i.e. (1) enable WLAN low-rate (2) enable broadcasting of Probe detection response (3) adjust Beacon frame sending interval to the default 100 TU (4) cancel prohibiting weak signal terminal access (5) cancel configuration-related commands with options. These optimization configurations can reduce the use of air channels and may cause the terminal network card to misjudge when unstable signals appear.

3. Check if the RF Beacon frame statistics are normal.

By default, the AP periodically sends Beacon frames to inform the access terminal of wireless access signal information. Each time the AP sends the signal, the Beacon statistics will accumulate counts. We can judge whether the AP is sending signals normally or not by the increase in the Beacon statistics value.

Command:

display ar5drv 1 statistics <<<

View RF1 statistics

display ar5drv 2 statistics <<<

View RF2 statistics

For example, view the Beacon statistics of RF1 for the AP:

Enter the [V5-AP_hidecmd] or [V7-AP-probe] view:

 display ar5drv 1 statistics

Beacon statistics

 BeaconIntCnt        : 1562

 BeaconBusyCnt       : 0

 BeaconErrCnt        : 0

Parameter explanation:

BeaconIntCnt: Beacon frame statistics value, continuous growth indicates that the signal is sent correctly.

BeaconBusyCnt: the number of statistics count on the failure of Beacon frame sending due to external wireless interference. At this time, the poor air channel environment is indicated, and optimizing the wireless network can improve it.

BeaconErrCnt: the number of statistics count on the failure of Beacon frame sending due to RF hardware. If it increases, it may indicate RF hardware faults.

1.Collecting AC/AP Information

If the issue cannot be resolved through the above steps, collect the following information and provide it to H3C technical support for analysis:

[AC] display current-configuration <<<collect AC configuration information

Collect AP diag information five times in a row, either using the [V5-AP_hidecmd] or [V7-AP-probe] view:

display ar5drv 1/2 statistics <<<collect five times, where 1/2 represents the radio frequency number

display ar5drv 1/2 bss all <<<collect five times

display ar5drv 1/2 channelbusy <<<collect five times