Method for protecting and recovering cross-domain end-to-end label switched path

Abstract

The invention discloses a method for protecting and recovering a cross-domain end-to-end label switched path and relates to the field of an automatic switched optical network. The method comprises the following steps of: S1, building a work path and N protection paths, wherein N is greater than or equal to 1; S2, judging the path in which a fault occurs, if the path is the work path, carrying out protection switching on business, and judging the position at which the fault is at the same time; if the position is in a source domain, a host domain or an intermediate domain, triggering one protection path bypassing a fault point in the domain in which the fault occurs; splicing the protection path with the protection paths without the fault in the other domains to form a new protection path; if the position is between the domains, performing no triggering on recovery of the work path with the fault; and if the fault is on the protection path, needing no protection switching on the business, triggering one new protection path in the domain, and splicing the protection path with the protection path without the fault in other domains to form another new protection path. According to the invention, by protecting, restoring and splicing an LSP (link state packet) of each segment, multipoint faults in the domains or between the domains are effectively resisted, and high reliability requirements of cross-domain business are met.

Description

technical field

[0001] The invention relates to the field of automatic switching optical network, and specifically relates to a method for protecting and restoring cross-domain end-to-end label switching paths. Background technique

[0002] ASON (Automatically Switched Optical Network, Automatically Switched Optical Network) emerges as the times require with the demand for flexibility in service scheduling in optical networks. The automatic control function of the ASON network is mostly reflected in a control domain, including: establishment and deletion of services, protection and recovery when services fail, and automatic return after faults are cleared.

[0003] When an ASON network consists of equipment from multiple manufacturers, in order to shield the differences in the details of equipment from different manufacturers and protect its own key technologies, the equipment of each manufacturer usually forms an ASON control domain separately, and communicates with equipme...

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