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Method, system and device for detecting network intercept of direct-connecting link and network equipment

A technology of direct link and detection device, applied in the network field, can solve the problems of inability to detect the existence of intermediate equipment, inability to effectively prevent packet interception, etc., achieve strong versatility and universal applicability, and prevent network interception. Effect

Active Publication Date: 2011-04-13
RUIJIE NETWORKS CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Embodiments of the present invention provide a direct link network interception detection method, system, device, and network equipment to solve the problem that the network equipment on the direct link cannot detect the existence of intermediate equipment in the prior art, so that it cannot The problem of effectively preventing transmitted messages from being intercepted by intermediate devices

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Embodiment Construction

[0031] Aiming at the problem that the intermediate device in the direct link cannot be effectively detected in the prior art, the embodiment of the present application provides a direct link network interception detection method, which is based on the connection of the device port in the direct link The state property is implemented.

[0032] Network devices generally communicate between devices by sending and receiving messages through ports on the devices. Since the intermediate device has the characteristic of transparently transmitting messages between two devices, it is impossible to use messages to detect the intermediate device. However, between two directly connected devices, if the state of a port of a device changes from connected state to disconnected state, and no longer receives and sends packets, the state of the other port on the directly connected link will also change. It will be affected and become disconnected; when the port needs to communicate, both ports ...

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Abstract

The invention discloses a method, system and device for detecting network intercept of a direct-connecting link and network equipment. The method comprises the following steps: a first port of first equipment and a second port of second equipment are connected through the direct-connecting link, and the first port is controlled to trigger the link to jitter according to the set link jitter time after the first port is detected to be in a linkup state; whether the second port is subjected to link jitter is monitored; if yes, intermediate equipment does not exist between the first equipment and the second equipment; and if no, the intermediate equipment exists between the first equipment and the second equipment. By detecting whether the intermediate equipment exists or not by link jitter, the invention prevents the transmitted massages from being intercepted, and the invention is simple and convenient to realize and does not affect the massage transmitting efficiency.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a direct link network interception detection method, system, device and network equipment. Background technique [0002] A direct link refers to the situation where two ports on two network devices are directly connected through a link, such as figure 1 As shown, port 1 on device 1 is directly connected to port 2 on device 2 through a network cable, and packets sent from port 1 directly reach port 2 through the network cable, and vice versa. [0003] In the above direct link, an intermediate device can be connected, such as figure 2 As shown, an intermediate device is added between device 1 and device 2. The packet sent by device 1 from port 1 enters port 3 of the intermediate device, and then sends out from port 4 of the intermediate device to port 2 of device 2. All packets transmitted between device 1 and device 2 are transferred through the intermediate device. Since the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L49/9023
Inventor 林嘉
Owner RUIJIE NETWORKS CO LTD
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