Implementation method of link protection using ptn network to carry point-to-point dedicated line service

Abstract

The invention discloses a link protection implementation method for bearing a point-to-point private line service by a PTN (Packet Transport Network) network. The PTN network provides two mutually redundant transport paths for an access device, when a working path is in link failure, the access device at a first end switches to a protection path; an upstream operator edge device of the working path inserts a path layer CSF warning message into a downstream PTN node of the working path; the downstream PTN node transparently transmits the CSF warning message; after receiving the CSF warning message, the working path downstream operator edge device connected with the access device at a second end turns off a port butted to the access device at the second end; and the access device at the second end switches to the protection path. In the method provided by the invention, the upstream operator edge device converts the link warning into the path layer CSF warning, and the downstream operator edge device turns of own ports according to the path layer CSF warning, thus, the transport of link failure information between users is finished, and the link protection reliability is effectively ensured when the PTN network bears the point-to-point private line service.

Description

technical field [0001] The invention relates to link protection technology, in particular to a method for implementing link protection using a PTN network to carry point-to-point dedicated line services. Background technique [0002] The growth of enterprise users' network transmission requirements and the upgrading of communication infrastructure have greatly promoted the development of PTN private line services based on IP and packet technology. Under the situation that enterprises are increasingly realizing IP (IToIP) through enterprise LAN, gateway router, enterprise firewall and other data communication means, the maturity of enterprise internal information management is developing more specific applications, bringing more enterprise Internet Requirements, including enterprise unified data center; GbE / 10GbE interconnection between enterprise departments; requirements brought by storage network--storage and disaster recovery; guaranteed high-bandwidth Internet access; vi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the point-to-point private line service carried by PTN. When a link failure occurs in the working path between the access device at one end and the edge device of the operator, the access device at the other end cannot switch to the backup link in time. The problem

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