Why an 802.1X User Cannot Obtain an IP Address After Passing Authentication?

If VLAN authorization is configured on the authentication server and the VLAN that the DHCP server belongs to is an authorization VLAN, the type of the interface that the 802.1X user connects to must be hybrid. Otherwise, the user cannot obtain an IP address after passing the authentication.

To modify the interface type to hybrid, perform the following configurations (using GE0/0/1 as an example):

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo port link-type
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid