STA Roaming Failure

Common Causes

• The password configuration in the security profile before roaming is different from that after roaming.
• The STA initiates Layer 3 roaming, but Layer 3 roaming is disabled on the device.

Troubleshooting Flowchart

Run the display station offline-record all command to check the reason of STA roaming failure.

[AC6605-wlan-view] display station offline-record all
Rf/WLAN: Radio ID/WLAN ID
------------------------------------------------------------------------------
STA MAC         AP ID Ap name  Rf/WLAN    Last record time
                Reason
------------------------------------------------------------------------------
f06b-ca63-313d  2     ap-10    0/1        2015-12-04/15:01:32
                Layer 3 roaming is disabled. 
------------------------------------------------------------------------------ 

Troubleshooting Procedure (in the Web System)

1. Check security profile configuration.

   Choose Configuration > AP Config > AP Group, select the AP group to which the AP belongs, and click VAP Configuration. Click the VAP profile, then click Security Profile. Configure a new password, and ensure that a same key is configured in the security profiles before and after roaming.

2. Check whether Layer 3 roaming is disabled on the device.

   A STA roams at Layer 3 if either of the following condition is met:

   - The service VLAN varies after roaming.

   - The service VLAN remains the same, but the Roaming group changes.

   Choose Configuration > AP Config > AP Group, select the AP group to which the AP belongs, and click VAP Configuration. Click the VAP profile, then enable Layer 3 roaming.

3. Check whether the fault is rectified.

   Enable the STA to move between the two APs, and check whether the STA roams following the procedure in Viewing the Roaming Track in section Troubleshooting: STA Roaming Errors Occur.

   If the STA roaming still fails, contact Huawei technical support personnel.

Troubleshooting Procedure (on the CLI)

1. Check security profile configuration.

   Run the security name command to access the security profile view. Configure a new key and ensure a same key is configured in the security profiles before and after roaming.

   [AC6605-wlan-view] security name default
   [AC6605-wlan-sec-prof-default]

2. Check whether Layer 3 roaming is disabled on the device.

   Run the vap-profile name command to access the VAP profile bound to the AP group to which the AP belongs, and check whether Layer 3 roaming is disabled in the VAP profile. If the STA initiates Layer 3 roaming, but Layer 3 roaming is disabled, the roaming fails. Run the undo layer3-roam disable command to enable Layer 3 roaming.

   [AC6605-wlan-view] vap-profile name default
   [AC6605-wlan-vap-prof-default] display this
   #
     layer3-roam disable
   #
   return
   [AC6605-wlan-vap-prof-default] undo layer3-roam disable  

3. Check whether the fault is rectified.

   Enable the STA to move between the two APs, and check whether the STA roams following the procedure in Viewing the Roaming Track in section Troubleshooting: STA Roaming Errors Occur.

   If the STA roaming still fails, contact Huawei technical support personnel.