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Recovery method and apparatus for optical network LSP occuring abnormal delete

A recovery method and optical network technology, applied in the field of network management, can solve problems such as non-recovery, and achieve the effect of solving loss

Inactive Publication Date: 2008-11-26
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings that ASON cannot effectively distinguish between normal deletion and abnormal deletion of optical connections, and cannot recover the control information of connections and LSPs when optical connections are abnormally deleted, the present invention proposes a method to add error codes in fault messages , according to different error codes, different error messages are distinguished, and the method of initiating LSP reconstruction is initiated according to the LSP information stored in the first node of the service

Method used

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  • Recovery method and apparatus for optical network LSP occuring abnormal delete
  • Recovery method and apparatus for optical network LSP occuring abnormal delete
  • Recovery method and apparatus for optical network LSP occuring abnormal delete

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[0052] see figure 1 and figure 2 , when the network is running normally, after node E in the figure resets and restarts, the control plane fails to recover, resulting in the abnormal deletion of the intelligent LSP connecting the services of network elements A-B-E-F. In order to restore the abnormally deleted LSP and initiate LSP reconstruction, the specific steps are as follows:

[0053] Step 101: Node B upstream of node E sends a Path message carrying a recovery flag to node E;

[0054] Step 102: After node E receives the Path message, it checks the corresponding LSP cross information on this node according to the recovery flag and label information carried in the Path message. If node E does not check the corresponding LSP cross information, it means that the A-B-E-F network element is connected If the service is lost, it is necessary to delete the intelligent cross-connection of all nodes in the LSP and the control information of the LSP, then perform step 103. If node ...

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Abstract

A method for recovering abnormal deletion of an optical network LSP includes: detecting cross information of an LSP when a node on the LSP fails; determining an error code according to a result of the detecting; handling an intelligent cross connection of the LSP; sending a failure message carrying the error code along the LSP; deleting control information of the LSP; and performing reestablishment of the LSP according to the reestablishment of the LSP initiated by a head node of the LSP or performing establishment of a new LSP according to the establishment of the new LSP initiated by the head node of the LSP, the head node initiating the reestablishment of the LSP or the establishment of the new LSP according to the error code carried in the failure message.

Description

technical field [0001] The invention relates to the field of network management, in particular to a recovery method and device for abnormal deletion of an optical network LSP (Label Switched Path). Background technique [0002] ASON (Automatically Switched Optical Network) is also known as intelligent optical network. Unlike traditional optical networks, ASON adds a control plane to traditional optical networks: optical network elements are first obtained through link local discovery technology The connection relationship between this network element and other optical network elements, and then publish its node and link status through the control plane, and receive the status release of other network elements in the network. Finally, each optical network element has a network that describes the precise topology of the network Topology information, including node, link, resource information. When configuring and scheduling services, the optical network element uses network t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04B10/08H04L12/56H04L29/06H04L12/54
CPCH04Q11/0062H04Q2011/0077H04L45/50H04Q2011/0081H04L12/5695H04L45/28H04L43/0811H04L47/70
Inventor 饶国义蔡军州李东
Owner HUAWEI TECH CO LTD
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