(Multi-select) You queried PPPoE simulation results on the MDU side as shown below.

The service configuration of PPPoE users is normal

The PPPoE user account and authentication method are correct

The link between the MDU uplink and the BRAS is OK

The MDU management IP is configured correctly

A, B, COn Huawei devices, PPPoE diagnostic/simulation tools verify the end-to-end PPPoE procedure (Discovery and Session), and—when credentials are supplied—authentication (PAP/CHAP) as well:Successful PADI/PADO/PADR/PADS exchange confirms Layer-2 reachability to the BRAS (option C).A successful session establishment and authentication indicate that the service configuration for PPPoE users is correct and the username/password & auth method are valid (options A and B).The MDU management IP (option D) is unrelated to the PPPoE access simulation itself; PPPoE runs over the subscriber VLAN/port/uplink toward BRAS, not via the MDU’s management plane, so simulation success does not prove the management IP configuration.These behaviors align with Huawei’s PPPoE diagnostic/monitoring command descriptions that detail session status, discovery phases, and authentication verification for fault location