When the AR router functions as the AC and uses the WPA or WPA2 authentication, the terminal cannot go online

Root cause analysis: Through the analysis, when the AR is used as the AC and the Layer 3 interface is used as the downlink interface to connect to the AP, the AR does not support WPA or WPA2 authentication. Detailed information is as follows:
1. Interaction verification of WEP authentication is performed only between the AP and the STA. Therefore, when the AR uses the Layer 3 interface as the downlink interface to connect to the AP, the terminal can go online normally.
2. Layer 2 packets of WPA/WPA2 authentication are used and need to reach the AC. When the AR uses the Layer 3 interface as the downlink interface to connect to the AP, the terminal cannot go online because the Layer 3 interface on the AR cannot process the exchanged authentication packets. As a result, the terminal cannot go online.
Summary and suggestion: In customer's networking, if the AR is used as the AC, you are advised to install the LAN card on the AR to connect to APs. In this case, the authentication mode is not limited.

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