Multi-segment pseudo-wire establishing and recovering method and device as well as system

A multi-segment pseudowire and establishment method technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of occupying system communication resources and reducing the utilization rate of communication resources

Active Publication Date: 2012-04-04
ZTE CORP
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Problems solved by technology

However, the standby MS-PW will always occupy the communication resources of the ...

Method used

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  • Multi-segment pseudo-wire establishing and recovering method and device as well as system
  • Multi-segment pseudo-wire establishing and recovering method and device as well as system
  • Multi-segment pseudo-wire establishing and recovering method and device as well as system

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Embodiment Construction

[0073] The invention discloses a method for establishing a multi-segment pseudo-wire, such as figure 1 As shown, the method includes:

[0074] Step 101, the head-end node calculates a path to reach the MS-PW of the target end node via the switching node according to the triggered request for establishing the MS-PW, and encapsulates the relevant information of the path in a Label Switched Path (Label Switched Path) , LSP) in the Path (Path) message;

[0075] Here, the Path message is divided into an LSP Path message carrying LSP layer path related information and an MS-PW Path message carrying PW layer path related information.

[0076] Step 102, the head-end node establishes an LSP with the next-hop switching node as a service layer according to the Path message;

[0077] Specifically, the head-end node sends a Path message of the LSP to the next-hop switching node in the path through a traffic engineering-based resource reservation protocol (RSVP-TE);

[0078] The switchin...

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Abstract

The invention provides a multi-segment pseudo-wire establishing method which comprises the following steps that by calculation, a head end node obtains a path of a MS-PW (Multi-Segment Pseudo-Wire) which reaches a destination end node through a switching node; the head end node establishes a LSP (Layered Service Provider) between the head end node and the switching node of a next hop as a service layer; the head end node issues the Path information of establishing a pseudo-wire segment of the MS-PW to the switching node of the next hop on the established LSP layer till the destination end node receives the Path information of establishing the pseudo-wire segment of the MS-PW; the destination end node obtains the resource Resv (Reserve) information of the MS-PW according to the Path information; and the switching node receiving the Resv information of the MS-PW forwards the Resv information of the MS-PW to nodes of a previous hop, and the nodes establishes the PW as a client layer according to the received Resv information of the MS-PW. The invention also discloses a multi-segment pseudo-wire recovering method and a device as well as a system, thereby realizing the reestablishment of a new MS-PW when faults occur and avoiding the establishment of the standby MS-PW when no faults occur so as to more effectively use the communication resources of the system.

Description

technical field [0001] The present invention relates to pseudowire management in communication technology, in particular to a multi-segment pseudowire (Multi-Segment Pseudo Wire, MS-PW) establishment and restoration (Restoration) method, device and system. Background technique [0002] In a single-domain and cross-domain networking environment, it is necessary to establish an MS-PW between the head-end node (Terminating Provider Edge, T-PE) and the tail-end node through the switching node (Switching Provider Edge, S-PE). The MS-PW includes at least two pseudo wire segments (Pseudo Wire Segment, PWS). [0003] When a PWS in the MS-PW fails, if no corresponding measures are taken, the connection of the MS-PW will fail, and then data transmission at the Pseudo Wire (Pseudo Wire, PW) layer cannot be performed. [0004] Currently, a Label Distribution Protocol (Label Distribution Protocol, LDP) is generally used to establish a pseudowire. When using the LDP protocol to establis...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/24H04L45/247H04L45/28
CPCH04L45/68H04L45/28
Inventor 夏欣林雪峰高开林
Owner ZTE CORP
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