Method and apparatus for implementing edge-to-edge pseudo-line simulation

Abstract

The present invention provides a method and device for realizing edge-to-edge pseudowire simulation. In the uplink process and downlink process, a multi-protocol label switching processing card is set. The label switching message is forwarded to the processing card; the processing card encapsulates the switching message into a data message in an edge-to-edge pseudowire emulation format, and switches the message to the switching chip; during the downlink process, the switching chip Forwarding the received external MPLS message to the processing card; the processing card encapsulates the data message in the exchange message into the internal MPLS message, and encapsulates the switched The message is switched to the switch chip. The invention adds a processing card, so that the PWE3 service is realized on the IP-DSLAM, and after the internal MPLS message is switched to the switch chip of the main control board, the MPLS message can guarantee that the user access circuit information will not be lost.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for realizing edge-to-edge pseudo wire emulation (PWE3, Pseudo Wire Emulation Edge to Edge). Background technique [0002] Edge-to-edge pseudowire (PW, Pseudo Wire) emulation is formulated by a working group under the Internet Engineering Task Force (IETF, Internet Engineering Task Force) to provide traditional first Layer and Layer 2 technology for network traffic. At present, PWE3 is mostly used on router equipment. With the continuous development of second-layer virtual private network (VPN, Virtual Private Network) services, many operators have already installed digital subscriber line access multiplexers (IP-DSLAM, Digital Subscriber Line Access Multiplexer) equipment to realize the PWE3 service requirements, so as to achieve the purpose of transparently transmitting the user-side Ethernet / Asynchronous Transfer Mode (ATM, Asynchronous Tran...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for realizing edge-to-edge pseudo-wire emulation, which is used to solve the problem of existing edge-to-edge pseudo-wire emulation methods on IP-DSLAM equipment due to the fact that the switching chip does not support multi-protocol It is difficult to implement MPLS caused by label switching, and the switch chip of the main control board cannot determine whether the circuit accessed by the user is a PWE3 service circuit.

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