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Method and system for negotiating bidirectional forwarding detection session identifier for pseudo wire

A technology of two-way forwarding detection and pseudo-wire, applied in the field of communication

Active Publication Date: 2011-06-15
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The present invention provides a method for negotiating bidirectional forwarding of pseudowires to detect session identifiers, which is used to solve the bidirectional forwarding of negotiating pseudowires through LSP Ping in the existing PWE3 system Detecting session specifiers complicates the process

Method used

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  • Method and system for negotiating bidirectional forwarding detection session identifier for pseudo wire
  • Method and system for negotiating bidirectional forwarding detection session identifier for pseudo wire
  • Method and system for negotiating bidirectional forwarding detection session identifier for pseudo wire

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Embodiment Construction

[0035]In order to solve the problem in the prior art that LSP Ping is used to negotiate the bidirectional forwarding detection BFD discriminator and cause the establishment and maintenance efficiency of the pseudowire to be low, the establishment process of the pseudowire in this embodiment complies with the definition of RFC4447, through the Label Distribution Protocol (LDP , Label Distribution Protocol1) to negotiate the pseudowire parameters and the pseudowire BFD identifier; the BFD capability and the BFD identifier of the VCCV are extended in the pseudowire establishment label mapping message, and when the pseudowire does not support the BFD capability, it is sent to the peer The LDP message of the end device carries information that does not support the BFD capability. When the BFD capability status at both ends of the pseudowire changes, the status code of the BFD capability dynamic revocation is extended in the pseudowire status information of the LDP notification messag...

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Abstract

The invention discloses a method for a specificator of a bidirection forwarding detection session in a negotiation pseudo wire, a device and a system thereof. The invention is used for solving the problem existing in a PWE3 system which causes the processing process difficult through using the specificator of a bidirection forwarding detection session in an LSP Ping negotiation pseudo wire. The method in the invention comprises the processes: a first device sends the information used for the pseudo wire parameter negotiation to a second device, and the information carries a bidirection forwarding detection BFD ability of a VCCV and a BFD specificator determined by the virtual circuit of the pseudo wire in the first device; when the second receives the BFD ability and the BFD specificator,the information which carries the BFD ability of a VCCV of the pseudo wire in the second device and the distributed BFD specificator of the pseudo wire is sent to the first device by the second device; by adopting the method in the invention, the negotiation process of the bidirection forwarding detection session is simplified, thus increasing the building and maintenance efficiency of the pseudo wire in the system.

Description

technical field [0001] The invention relates to the field of communication, in particular to a method for negotiating a bidirectional forwarding detection session identifier of a pseudowire in an edge-to-edge pseudowire emulation system. Background technique [0002] Edge-to-edge pseudowire emulation (PWE3, Pseudo Wire Emulation Edge-to-Edge) technology is used to simulate asynchronous transfer mode (ATM, Asynchronous Transfer Mode), frame relay (FR) in packet switching network (PSN, Packet Switched Network) , Frame Relay), Ethernet, low-speed time division multiplexing (TDM, Time Division Multiplexing) circuits and synchronous optical network (SONET, Synchronous Optical Network) / synchronous digital series (SDH, Synchronous Digital Hierarchy) and other basic characteristics of services, pseudowire ( The function of PW, Pseudo Wire) includes encapsulating the protocol data unit (PDU, Protocol Data Unit) of a specific service at the ingress, and then carrying these PDUs on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/46H04L12/26
CPCH04L47/10H04L45/50H04L45/02H04L12/4633H04L45/68H04L12/66H04L45/04
Inventor 刘珺
Owner HUAWEI TECH CO LTD
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