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PPPoE
Overview
Point-to-Point Protocol over Ethernet (PPPoE) uses the client/server model. It establishes point-to-point links
over Ethernet, and encapsulates PPP packets in Ethernet frames.
APs configured as PPPoE clients can be connected to the Internet through a remote access device, and
access control and accounting can be implemented on a per-AP basis.
PPPoE undergoes two phases: discovery and PPP session.
• Discovery phase, where a PPPoE session is initiated. In this phase, the client obtains the MAC
address of the access end and generates the PPPoE session ID.
• PPP session phase, where PPP packets are encapsulated in Ethernet frames before being sent to the
peer.
In the frame, the session ID must be the one determined in the discovery phase, the MAC address must
be that of the peer, and the PPP packet section begins from the Protocol ID field. In the session phase,
either end of the link can terminate the session by sending PPPoE Active Discovery Terminate (PADT)
packets.
For more information about PPPoE, see RFC 2516.
Figure 147 Network diagram
Configuring PPPoE client
1. Select Network > PPPoE from the navigation tree.
The system automatically enters the Client page, as shown in Figure 148.
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