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Associated bidirectional label switched path creation method and system

A label switching path and reverse technology, which is applied in the field of creating bidirectional label switching paths, can solve the problems of multiple interactions and affect the efficiency of LSP creation, and achieve the effect of improving the creation efficiency.

Inactive Publication Date: 2011-08-31
ZTE CORP
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  • Abstract
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Problems solved by technology

The disadvantage of this solution is that when the head and tail nodes are bound, it is necessary to generate bidirectional forwarding entries first, and then delete the existing unidirectional forwarding entries, resulting in multiple interactions between the control plane and the forwarding plane, affecting the efficiency of LSP creation

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  • Associated bidirectional label switched path creation method and system
  • Associated bidirectional label switched path creation method and system
  • Associated bidirectional label switched path creation method and system

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Embodiment Construction

[0022] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

[0023] In this embodiment, a method for creating an associated bidirectional label switching path is provided. In this embodiment, the first node (also referred to as node A) and the second node (also referred to as node B) serve as the beginning and end of the LSP When the reverse LSP of the LSP is established, the second node serves as the head node of the reverse LSP, and the first node serves as the tail node of the reverse LSP. figure 2 It is a flow chart of a method for creating an associated bidirectional label switching path according to an embodiment of the present invention, and the flow chart includes the following steps:

[0024] Step S202, the first no...

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Abstract

The invention discloses an associated bidirectional label switched path creation method and an associated bidirectional label switched path creation system. The method comprises the following steps that: a head node transmits a PATH message to create a label switched path (LSP) to a tail node, wherein the PATH message carries indicating information for indicating the creation of a backward LSP associated with the LSP; the tail node creates the backward LSP for the LSP according to the indicating information; and after the LSP and the backward LSP are created successfully, the head node and the tail node associate the LSP and the backward LSP. By the method and the system, the associated bidirectional LSP creation efficiency is improved.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method and system for creating an associated bidirectional label switched path (Label Switched Path, LSP for short). Background technique [0002] With the continuous development of the packet transport network (packet transport network, PTN for short) technology, the PTN network will be the main access technology of each network operator. The currently defined PTN networks include but are not limited to the following networks: MPLS (Multi-Protocol Label Switching), T-MPLS (Transport-MPLS), MPLS-TP (MPLS-Transport Profile), Ethernet (Ethernet) and the like. [0003] The creation of bidirectional LSPs in PTN is of great significance, wherein bidirectional LSPs can be divided into co-routed bidirectional LSPs (co-routed bidirectional LSPs) and associated bidirectional LSPs (associated bidirectional LSPs). Since there are requirements for delay / protection / operation, man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/50
Inventor 杨帆张飞袁仁状司徒嘉鲍晓
Owner ZTE CORP
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