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Network loop detection method and device

A technology of network loop and detection method, applied in the field of communication, can solve problems such as network paralysis and affect normal business, and achieve the effect of automatic and timely detection

Inactive Publication Date: 2017-06-23
JINQIANMAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Loops in the network will cause the device to continuously copy and forward broadcast, multicast and unknown listcast messages, causing network paralysis and affecting normal business

Method used

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  • Network loop detection method and device
  • Network loop detection method and device
  • Network loop detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 2 with image 3 , the loop scenario of the embodiment of the present invention is as follows figure 2 Shown: The second port of the second device has a self-loop due to hardware damage, driver abnormality, or artificially configured loopback function, and the first device (detection device) and the second device form a loop fault.

[0045] image 3 A flow chart of a method for loop detection is shown, and the method in this embodiment includes:

[0046] Step 201: The first port of the first device (detection device) sends a detection message at a period of 5 minutes.

[0047] Wherein, the detection message adopts the encapsulation format of the following table 1:

[0048] Table 1

[0049] offset byte size Field Name illustrate 0x0000 6 Destination address Fixed to broadcast address 0xffffffffffff 0x0006 6 source address device mac address 0x000C 2 Ethernet type private type 0x8866 0x000E 1 agreement t...

Embodiment 2

[0061] The loop scenario in Embodiment 2 of the present invention is as follows Figure 4 Shown:

[0062] A loop occurs in the physical connection between the second device, the third device, and the fourth device, and the detection message sent by the first port of the first device is received by the first device again, so the first device detects the loop.

[0063] The steps of the loop detection method in this embodiment are the same as those in Embodiment 1.

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Abstract

The invention relates to a network loop detection method and device, and belongs to the field of communication technology. The method comprises that a port of a detector sends a detection message to a network regularly; and whether the detector receive the detection message is detected, and if YES, it is determined that a loop fault occurs in the network. The method and device have the advantages of realizing automatic and timely detection of the network loop, and avoiding network paralysis and influence on normal services caused by that equipment repeats and forwards broadcasting, multicasting and unknown unicasting messages continuously due to the network loop.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for loop detection. Background technique [0002] In a large-scale LAN network environment, a kind of fault that is prone to occur in the network is the network loop. There are many reasons for the network loop, such as: [0003] Improper configuration of network equipment; [0004] Hardware damage to network equipment; [0005] Network physical topology connection errors often occur when network changes are made; [0006] The network is attacked by viruses, etc. [0007] Loops in the network will cause the device to continuously copy and forward broadcast, multicast, and unknown listcast packets, causing network paralysis and affecting normal services. In order to detect loops in the network in time, it is necessary to provide a loop detection technology that can automatically detect and discover loops in the network, and even control the d...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/26
CPCH04L41/0631H04L43/0811H04L43/0823
Inventor 黄宗荣林大甲林苏沈
Owner JINQIANMAO TECH CO LTD
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