PPPoE client which experiences abnormal disconnection, terminates an open pre-disconnection session before starting new session, upon reconnection

摘要

A point to point protocol over Ethernet (PPPoE) system wherein a client which has experienced an abnormal disconnection due to a fault attempts a reconnection. The client initiates the discovery process with a PPPoE Active Discovery Initiation packet (PADI) transmitted to a server, it assesses the returned packet to determine if it is a PPPoE Active Discovery Offer (PADO) packet. If it is discovery continues as normal. If the packet is not a PADO packet the client extracts session information from it and inserts it into a PPPoE Active Discovery Termination (PADT) packet to terminate the open session. Once a corresponding PADT is received from the server discovery recommences with a new PADI. The system allows rapid resumption of communication after a fault, even when the pre-fault session has not been terminated by timeout.