Principles of the PPPoE simulation feature

Maintenance engineers simulate a user terminal on an access node to initiate a Point-to-Point Protocol over Ethernet (PPPoE) dialup process. Then the access node interacts with the broadband remote access server (BRAS). PPPoE is divided into the discovery and session stages.

PPPoE discovery stage: The source host discovers the MAC address of the destination host (in this case, the BRAS), and a point-to-point PPP session is set up.
PPPoE session stage: PPPoE session stage: A point-to-point connection is set up and carries PPP packets for link negotiation.

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