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Method and equipment for detecting link fault

A technology of link failure and detection method, applied in the field of communication, can solve problems such as inability to receive a response, achieve the effect of improving ease of use and reliability, and avoiding false alarms of link failures

Active Publication Date: 2012-07-04
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in practical applications, it is not possible to ensure that the devices on both sides of the link enable the detection protocol. Assuming that only one side enables the detection protocol and the other side does not enable the detection protocol, then for the devices that enable the detection protocol, there will be If the response cannot be received after several consecutive intervals, at this time, the device with the detection protocol enabled will think that the connection is faulty, but the actual situation is that the device on the other side does not have the detection protocol enabled, and the connection is not faulty, which leads to a chain of false positives. occurrence of road failure

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  • Method and equipment for detecting link fault
  • Method and equipment for detecting link fault
  • Method and equipment for detecting link fault

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Embodiment Construction

[0041] In order to avoid the generation of a unidirectional link, it is necessary to detect devices on both sides of the link, wherein the detection protocols include but not limited to: OAM, DLDP (Device Link Detection Protocol, Device Link Detection Protocol).

[0042] Specifically, DLDP can monitor the link status of optical fiber or copper twisted pair. If a unidirectional link is found, DLDP will automatically close or notify the user to manually close the relevant port according to user configuration to prevent network problems.

[0043] In addition, DLDP is a link layer protocol that can work with physical layer protocols to monitor the link status of devices. Among them, the auto-negotiation mechanism of the physical layer can detect physical signals and faults, and DLDP can identify peer devices, identify unidirectional links, and close unreachable ports. By working together, the two can detect and close physical and logical one-way connections. If both ends of the li...

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Abstract

The invention discloses a method and equipment for detecting link fault. The method comprises the following steps that: opposite-terminal equipment receives first detection message from home-terminal equipment, and switches a second Ethernet port to an on state according to the first detection message; the opposite-terminal equipment sends second detection message to the home-terminal equipment, and judges whether the first detection message from the home-terminal equipment can be received in the preset time; if so, the opposite-terminal equipment determines that the link between a first Ethernet port and the second Ethernet port has no fault; otherwise, the opposite-terminal equipment determines that the link between the first Ethernet port and the second Ethernet port has fault. The method and the equipment can accurately detect whether the link has fault.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and equipment for detecting link faults. Background technique [0002] Since the birth of Ethernet technology, it has gradually become the leading technology of local area network due to its features such as ease of use and low price. In recent years, with the successive application of Gigabit Ethernet and 10 Gigabit Ethernet technologies, Ethernet technology has been expanded to the direction of MAN and WAN. [0003] Because the Ethernet technology is mainly used in the local area network initially, and the local area network has lower requirements on reliability and stability. Therefore, the Ethernet OAM (Operation, Administration and Maintenance, operation, management and maintenance) can effectively improve the management and maintenance capabilities of the Ethernet, and ensure the stable operation of the network. Among them, the main functions of OA...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26
Inventor 徐鹏飞
Owner NEW H3C TECH CO LTD