Shortcut protection method based on path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol)

A path binding and path protection technology, which is applied in the field of data communication, can solve the problems of adding topology discovery protocols, slow protection speed, complex protocols, etc., and achieve the effect of improving ring network performance and protection speed

Inactive Publication Date: 2011-04-06
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] 3) Increasing the topology discovery protocol will increase the complexity of the protection protocol
[0029] Through the analysis of the above problems, the traditional Steering protection method needs the support of the topology discovery protocol, which has the problems of slow protection speed and complex protocol

Method used

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  • Shortcut protection method based on path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol)
  • Shortcut protection method based on path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol)
  • Shortcut protection method based on path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol)

Examples

Experimental program
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Embodiment

[0074] Example, the ring network fails:

[0075] Such as Figure 5a As shown, the ring network contains nodes A, B, C, D, E, F and G, and the links contained are , , , , and links. LISP1 is a label switching path from node A to node D, and its working path and working label are described as:

[0076] A{W1}→B{W2}→C{W3}→D

[0077] The protection path and label of "loopback protection" are:

[0078] A{P1}→F{P2}→E{P3}→D{P4}→C{P5}→B{P6}→A

[0079] Such as Figure 5b As shown, the protection path and protection label of "Steering Protection" are:

[0080] A{P1'}→F{P2'}→E{P3'}→D

[0081] Such as Figure 5c As shown, when the link fails, Node B and Node C send APS (Automatic Protection) messages to each other along the two ports on the ring respectively. Node B finds that LSP1 is an LSP through the ring, and switches the working label {W1} of LISP1 to the associated protection label {P6}, and then the data flow transmitted on LISP1 is looped back to node C along the ring ne...

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Abstract

The invention discloses a shortcut protection method based on a path-bound MPLS-TP (Multi-Protocol Label Switching-Transmission Protocol), comprising the following steps of: configuring a ring network protection link: configuring a protection path for loopback protection and a Steering-protected path for an LSP (Logical Signal Processor) of an upper ring by a ring network node; and when the ring network generates faults, carrying out the processing steps of: (1) processing adjacent nodes of a fault link; and (2) processing adjacent nodes of a non-fault link. The invention can find the protocol support without topology and simultaneously improve the Steering protection speed, which has great significance on improving the performance of the ring network based on the MPLS-TP technology.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method for protecting MPLS-TP Steering based on path binding. Background technique [0002] MPLS (Multi-protocol Label Switching, referred to as Multi-protocol Label Switching) is the most important technology in today's packet switching network. It has developed from point-to-point to point-to-multipoint. , it is necessary to supplement powerful OAM (operation and management) functions in MPLS, MPLS-TP (MPLS TransportProftle, ​​ie: MPLS transmission framework) is proposed under this background, it is a joint work composed of ITU-T and IETF The protocol family developed by the JWT group involves multiple technologies such as OAM, survivability, network management and control plane, and aims to improve the function and interoperability of the transport network. IETF is mainly completed by working groups such as MPLS, CCAMP, PWE3 and L2VPN. ITU-T has also formulated some standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/437H04L12/56H04L45/28H04L45/50
Inventor 王斌
Owner NANJING UNIV OF POSTS & TELECOMM
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