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Method for positioning erroneous LSP, PCC and PCE

An error and object technology, applied in the field of path calculation client and path calculation unit, can solve the problems of not being able to accurately represent the corresponding LSP of the error, and unable to process the LSP

Inactive Publication Date: 2018-08-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, if there is an error in the PCRpt message reporting the LSP status, the existing PCErr message will not be able to accurately indicate the specific LSP corresponding to the error, and the PCC will not be able to process the error LSP when it receives such an error message

Method used

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  • Method for positioning erroneous LSP, PCC and PCE
  • Method for positioning erroneous LSP, PCC and PCE
  • Method for positioning erroneous LSP, PCC and PCE

Examples

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no. 1 example

[0049] figure 2 It is a flow chart of the first embodiment of the method for locating an erroneous LSP according to the present invention, such as figure 2 As shown, the method includes:

[0050] Step 200: the PCE receives the LSP status information reported by the PCC.

[0051] In this step, before the PCE receives the LSP status information reported by the PCC, the PCE first uses the existing network topology information to create an end-to-end path for the PCC that meets the constraints and policies according to the path calculation request PCReq sent by the PCC, for example , the PCE creates an SR tunnel for the PCC; the PCC sends a message to the PCC to establish an SR tunnel through the PCInitiate message, and the PCE records the current LSP status and the attribute of the path is the SR type; the PCC receives the PCInitiate message and processes it, but in the process of processing The PCC understands the LSP created by the PCE as an ordinary RSVP tunnel. After the ...

no. 2 example

[0072] In order to better reflect the purpose of the present invention, further illustrations are made on the basis of the first embodiment of the present invention.

[0073] Figure 4 It is a flow chart of the second embodiment of the method for locating an erroneous LSP according to the present invention, such as Figure 4 As shown, the method includes:

[0074] Step 400: The PCC receives at least one PCErr message; the PCErr message carries identification information of at least one LSP where an error occurs.

[0075] Preferably, the PCErr message includes an additional type-length-value TLV in at least one PCEP-ERROR object, and the TLV carries identification information of an errored LSP.

[0076] In actual implementation, the identification information of the LSP in error may include: the path name of the LSP in error.

[0077] Step 401: The PCC determines an error LSP according to the received PCErr message.

[0078] In actual implementation, when th...

no. 3 example

[0081] In order to better reflect the purpose of the present invention, further illustrations are made on the basis of the first embodiment of the present invention.

[0082] Figure 5 It is a flow chart of the third embodiment of the method for locating an erroneous LSP according to the present invention, such as Figure 5 As shown, the method includes:

[0083] Step 500: The PCE receives the LSP status information reported by the PCC.

[0084] Step 501: After the PCE determines that an LSP has an error based on the LSP status information, it sends at least one PCErr message to the PCC; the PCErr message carries identification information of at least one LSP that has an error.

[0085] Preferably, the PCErr message may include an additional type-length-value TLV in at least one PCEP-ERROR object, and the TLV carries identification information of an errored LSP.

[0086] In this step, after the PCE determines that an error occurs in the LSP, it may further inc...

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Abstract

The embodiment of the invention discloses a method for positioning an erroneous label switched path LSP. The method comprises the following steps: a path computation client PCC receives at least one path computation element communication protocol error PCErr message, wherein the PCErr message carries identification information of at least one erroneous label switched path LSP; and the PCC determines the erroneous LSP according to the received PCErr message. The embodiment of the invention further discloses a path computation client PCC and a path computation element PCE.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method for locating an error-prone Label Switched Path (LabelSwitched Path, LSP), a Path Computation Client (Path Computation Client, PCC) and a Path Computation Element (Path Computation Element, PCE) . Background technique [0002] The PCC is used to process all path computation requests in one routing domain, or coordinate PCEs in multiple domains to process path computation requests in multiple routing domains. The PCE is generally called the path computation server, and the path computation requester is called the path computation client. When the PCE receives the path computation request (PCE Request, PCReq) from the PCC, it uses the existing network topology information to calculate the An end-to-end path that satisfies the constraints and policies, and returns the path calculation result to the PCC, thus completing a path calculation. [0003] RFC5440...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/723H04L12/703H04L45/50H04L45/28
CPCH04L45/28H04L45/50
Inventor 祝沈财
Owner ZTE CORP
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