Failure monitoring method and device of the virtual rented line

Abstract

The invention relates to the information technical field, disclosing a virtual leased line (VLL) failure monitoring method and device, where the method firstly receives the message sent by local user end to opposite user end from the VLL; judging whether the received message is a link protocol message and when the message is a link protocol message, judging whether the link protocol message is a failure message. In addition, the invention provides a VLL failure monitoring device. And the invention can monitor the link failure in any position when the same media are interconnected and fast reroute VLL service according to the monitored failure, so as to be able to effectively protect VLL service reliability.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a fault monitoring method and device for a virtual leased line. Background technique [0002] Virtual Leased Line (VLL, Virtual Leased Line) is a network interconnection service. VLL service is a point-to-point connection. If any point in the network fails, the VLL service will be interrupted, thereby reducing the reliability of the VLL service. sex. [0003] In order to improve the reliability of the VLL service, a VLL-based fast rerouting (FRR, Fast Reroute) method is proposed in the prior art. The prior art will be described below in conjunction with FIG. 1 , as shown in FIG. 1 , the networking diagram Including the user end (CE, Customer Edge) and the supply end (PE, Provider Edge), specifically implemented as follows: [0004] A primary pseudo-link (PW, Pseudo wire) is established between the counterparty provider and the local provider, and a backup PW is established...

AI Technical Summary

Problems solved by technology

[0006] But, above-mentioned prior art is when AC is Point-to-Point Protocol (PPP, Point-to-Point Protocol), Frame Relay (FR, Frame Relay) and advanced data link control (HDLC, High Level Data LinkControl) link It is divided into two cases: one case is the interconnection of heterogeneous media (for example, the link state is independently negotiated between the other party’s user end and the other party’s supply end, the local supply end and the local user end, and the local backup supply end and the local user end. ), at this time, the AC can use the mechanism of the link protocol itself to detect faults; another case is the interconnection of the same medium. The path negotiation packets are transparently transmitted on the other party's supply end. Therefore, when the same medium is interconnected, the other party's supply end cannot detect the failure of the AC link. Furthermore, the other party's supply end cannot switch from the primary PW to the backup PW, the VLL service cannot be protected

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