A method and device for ppp message traversing l2tp

Abstract

The invention discloses a method and device for PPP messages to pass through L2TP, and relates to the technical field of L2TP tunnel transmission. The method includes: after the L2TP protocol module establishes the L2TP session channel, it informs the SFWD module of the L2TP and PPP session mapping table; when the PPP module When sending a PPP control message, send the PPP control message to the SFWD module, and the SFWD module queries the mapping relationship between L2TP and PPP session in the session mapping table, and directly encapsulates the L2TP data packet header according to the mapping relationship; there is L2TP When a data packet or a PPP control message needs to be sent, the SFWD module strips the L2TP packet header and fills in the PPP instance ID and PPP session ID through the mapping relationship between L2TP and PPP session, and then sends it to the PPP module for processing. The method and device for PPP message traversing L2TP of the present invention can realize higher-performance transmission of PPP message after the L2TP tunnel is established successfully.

Description

technical field [0001] The invention relates to the technical field of L2TP tunnel transmission, in particular to a method and a device for PPP messages to traverse L2TP. Background technique [0002] Tunneling is a method of transferring data between networks by using the infrastructure of the Internet. The data (or payload) transmitted through the tunnel may be data frames or packets of different protocols. The tunneling protocol re-encapsulates data frames or packets of other protocols and sends them through the tunnel. [0003] At present, the L2TP protocol (Layer Two Tunneling Protocol, Layer Two Tunneling Protocol) is mainly used for corporate offices and business travelers to remotely connect to the corporate headquarters via a public network through a virtual tunnel. [0004] In the implementation of L2TP, after the L2TP tunnel is successfully established, the device also needs to enable the PPP protocol (Point to Point Protocol, point-to-point protocol), which is ...

AI Technical Summary

Problems solved by technology

[0011] In the above process, the LAC and LNS send packets through multiple inter-process scheduling and finally call SFWD, resulting in low efficiency, long time consumption, and risk of delay

When there are many users, there will be retransmission of messages, which will affect the online process in severe cases. At the same time, it will increase the burden on the equipment, slow the online speed, and the status is unstable.

Images