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Self-loop detection method and device used for access network

A detection method and self-loop technology, applied in the field of communication, can solve the problem of not being able to detect and process in time

Active Publication Date: 2008-06-11
ZTE CORP
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Problems solved by technology

But for the network environment similar to Fig. 3 (HUB also can be the PC host computer of dual network card), above-mentioned detection method can not detect and process in time (the message that port 1 sends comes back from port 9), and among Fig. 3 Self-loops can also cause broadcast storms

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  • Self-loop detection method and device used for access network
  • Self-loop detection method and device used for access network
  • Self-loop detection method and device used for access network

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0015] FIG. 4 shows a flowchart of a self-loop detection method for an access network according to an embodiment of the present invention, including the following steps:

[0016] Step S10, periodically sending a self-loop detection message with an authentication domain field;

[0017] Step S20, determining that the received message is a self-loop detection message;

[0018] Step S30, extracting the authentication domain field carried in the message and its MAC address; and

[0019] Step S40, if it is determined that the authentication domain field carried in the message is the same as the second authentication domain field in the self-loop detection message, it is confirmed that there is a self-loop abnormality in the access network.

[0020] This embodiment improves the self-loop detection method in the related art. When the port...

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Abstract

The invention provides a self-loop detection method and a self-loop detection device which are used for an access network. The method comprises the following steps: a self-loop detection message provided with authentication domain fields is transmitted in definite time; judgment is made whether a received message is a self-loop detection message; an authentication domain field carried by the message and an MAC address of the message are extracted; moreover, if judgment is made that the authentication domain field carried by the message is the same with a second authentication domain field of the self-loop detection message, self-loop exception of the access network is determined. The invention can detect various self-loop conditions in the access network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a self-loop detection method and device for an access network. Background technique [0002] Figure 1, Figure 2 and Figure 3 show self-loops in three different situations in the access network. In an access network, a self-loop is a relatively common network abnormality. As a result, the lighter MAC address is learned incorrectly, and the user cannot access the Internet normally. In severe cases, a network storm occurs, causing large-scale network paralysis. In order to eliminate the harm caused by the self-loop to the network, most network equipment suppliers provide the self-loop detection function, the basic principle of which is to send a message, if the message is received back from this port intact, Or just adding a Tag header, it means that there is a self-loop in the network connected to this port, and it is necessary to close this port and send an alarm message to th...

Claims

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Application Information

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IPC IPC(8): H04L1/20H04L12/26
Inventor 宋保科
Owner ZTE CORP
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