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same as that in the PADI packet. If the PPPoE server cannot provide services to PADI, it is
not allowed to use the PADO packet to respond.
PADR: Since PADI is sent as a broadcast, the PPPoE client may receive more than one
PADO packet, and it will review all the PADO packets received and choose a PPPoE server
based on the server name in it or the services provided, and then send a PADR (PPPoE Active
Discovery Request) packet to the selected server. PADR packet includes the services
requested by the client.
PADS: When PPPoE server receives the PADR packet sent by the client, it is ready to start a
PPPoE session, and creates a unique PPPoE session ID for PPPoE session, and sends to the
client a PADS (PPPoE Active Discovery Session-confirmation) package as a response.
When the discovery stage ends normally, both ends of the communication obtain the session ID
and their MAC addresses, and they define a PPPoE session together uniquely.
2.
PPP session stage
When PPPoE enters the PPP session stage, the client and the server will conduct a standard PPP
negotiation, and after this, the data is sent over PPP encapsulation. The PPP packets are
encapsulated as the payload of PPPoE frame in an Ethernet frame, and sent to the peer end of the
PPPoE link. Session ID must be the ID determined in the Discovery stage, and remains unchanged
during the session. The MAC address must be that of the peer end.
At any time during the session stage, both PPPoE server and client can send PADT (PPPoE Active
Discovery Terminate) to each other, notifying the other side of ending the session. When receiving
PADT, it is not allowed to use the session to send the PPP traffic. After sending or receiving a
PADT packet, even the conventional PPP end packet is not allowed to be sent. Normally, both
parties of PPP communication end the PPPoE session using the PPP itself, but can end the session
using PADT if PPP cannot be used.
8.3.2
PPPoE global Settings
Enter User management->PPPoE server page to configure the PPPoE server function. The
configuration parameters are described as follows.
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Chapter 8 User Management
Page 68
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