Technical Tip: Unexpected Adapter location changes in Huawei WLC HA setup

When Huawei controllers are running in HA, the connected user's location keeps changing between active and passive controller, affecting Location based policies.

For example, the following two screenshots show a user connected to both active and passive controllers at two different points in time:

Troubleshooting:

It was observed, even though the secondary controller isn't an active wireless controller, connected device records and MAC addresses are synced between them.
Therefore, whenever FortiNAC does L2 Poll, both of them responds with the MAC address table and whichever is polled later gets the adapter association in the FortiNAC.

Solution:

• L2 poll should only be kept enabled on Primary WLC.
• If the adapter's location is used in the Users and Host profiles, both Primary and Secondary WLC reference should be included in the location filter.