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Method and system used for realizing fault positioning of intermediate node autonomously

An intermediate node and fault location technology, applied in the field of network transmission, can solve problems such as inability to determine link quality degradation, and achieve the effect of ensuring data transmission quality and improving efficiency

Active Publication Date: 2013-01-23
BEIJING HUAWEI DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using the above scheme, the path that the two ping messages pass through inside the router H is not completely the same as the path that the message between node C and node E forwarded by router H passes inside the router H. Therefore, The above ping results cannot determine whether the link quality degradation is related to router H

Method used

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  • Method and system used for realizing fault positioning of intermediate node autonomously
  • Method and system used for realizing fault positioning of intermediate node autonomously
  • Method and system used for realizing fault positioning of intermediate node autonomously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1, please refer to image 3 , routers C, H, and E form a link, and routers C and E are end nodes of the link. The intermediate nodes of the link include router H and a packet capture module 301. The packet capture module 301 is a host computer with a packet capture function installed. The packet module 301 is used to capture packets on the router H, the port connecting the router H to the router E is 302, and the port connecting the router H to the router C is 303. When the end-to-end link quality degradation occurs between routers C and E, router H initiates fault location to determine whether the link quality degradation is related to the intermediate node (router H). see Figure 4 In this embodiment, the ping function supported by the network element is implemented, and the specific process is as follows:

[0044] In step 401. the test message is a ping message constructed by router H, router H sends the ping message to router E, and the ping message includ...

Embodiment 2

[0051] Embodiment two, image 3 When there is an end-to-end link quality degradation between routers C and E, router H initiates fault location, and uses the ping function supported by network elements to determine whether the link quality degradation is related to the intermediate node (router H). see Figure 5 , the specific process is as follows:

[0052] In step 501 , the test message is a ping message constructed by router H, and the ping message includes destination address information, wherein the destination address is the IP address of router C. Router H specifies an outgoing interface for the ping packet and sends the ping packet to router E.

[0053] In step 502, router E searches the forwarding table after receiving the ping message, router E forwards the ping message back to router H through the original path, and the ping message forwarded back to router H is the response message.

[0054] In step 503, router H forwards the ping message to C.

[0055] In step...

Embodiment 3

[0057] Embodiment three, image 3 When there is an end-to-end link quality degradation between routers C and E, router H initiates fault location, and uses the ARP function supported by network elements to determine whether the link quality degradation is related to the intermediate node (router H). see Image 6 , the specific process is as follows:

[0058] In step 601. the test message is an ARP request message constructed by router H, the intermediate node sends the ARP request message to router E, and the ARP request message includes source address and destination address information, wherein the source address is the IP address of router C , and the destination address is the IP address of router E.

[0059] In step 602, after router E receives the ARP request message, according to the ARP protocol, router E generates an ARP response message (that is, a response message) to router C and sends it to router H.

[0060] In step 603, router H forwards the ARP reply message...

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Abstract

The embodiments of the present invention provide a method and a system for an intermediate node to locate a fault independently, where the intermediate node serves to forward a packet between a first end node and a second end node. The method includes: creating a test packet and sending the test packet to the first end node, where the test packet protects address information of the second end node, and the test packet is used to trigger the first end node to send a response packet to the second end node; forwarding the response packet from the first end node to the second end node; capturing the response packet; and analyzing, according to a result of the packet capturing, whether a packet from the first end node to the second end node can be forwarded normally. In a networking scenario with mixed devices of a plurality of vendors, the technical solution of the present invention enables an intermediate node of a single vendor to locate a fault, thereby improving maintenance efficiency against faults and ensuring data transmission quality.

Description

technical field [0001] The invention relates to the field of network transmission, in particular to a method and a system for an intermediate node in a link to independently realize fault location. Background technique [0002] With the development of communication technology, how to ensure the quality of data transmission has become an urgent problem to be solved. One aspect of ensuring the quality of data transmission is how to quickly detect and locate link faults when there is a problem with data transmission, such as unclear phone voice, so as to maintain the link. [0003] figure 1 A common compositional form of a link is shown. See figure 1 , Routers C, H, and E form a link. Wherein, routers C and E are end nodes (End Node, EN) of the link, and router H is an intermediate node (Intermediate Node, IN) of the link. A data transmission starts from the source end node sending data to the destination end node receiving all the data correctly. During data transmission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/70
CPCH04L43/12H04L41/0677H04L43/10
Inventor 曹真尹相东黄文能
Owner BEIJING HUAWEI DIGITAL TECH