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Maintaining method of Ethernet link state

An Ethernet link and link technology, applied in the field of network link fault detection and processing, can solve the problems of increasing device CPU and memory consumption, network complexity, increasing network device load, etc., to facilitate construction and maintenance, equipment less demanding effects

Inactive Publication Date: 2009-06-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Increase the load on network equipment
Compared with using static routing, starting a dynamic routing protocol will greatly increase the CPU and memory consumption of the device.
[0005] 3. Increase the complexity of network maintenance
At the edge of the network, such as the connection between layer 3 switches and routers, static routing protocols are generally used, but in order to ensure the reliability of the network, all dynamic routing protocols must be activated, which greatly increases the complexity of the network
Especially in the MPLS network, the network will become extremely complex

Method used

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  • Maintaining method of Ethernet link state
  • Maintaining method of Ethernet link state
  • Maintaining method of Ethernet link state

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Embodiment Construction

[0012] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Such as figure 2 , is an implementation block diagram of the present invention, and the implementation of the present invention mainly contains the following steps;

[0014] Step 10: Determine the next-hop address to be detected by the local device by configuration;

[0015] Step 11: Check whether the static ARP of the next hop address is configured, if not, jump to step 17;

[0016] Step 12: regularly send ARP request (can be broadcast or unicast);

[0017] Step 13: Whether the response message of the arp request has not been received for three consecutive times, if yes, skip to step 19;

[0018] Step 14: After receiving the response message, whether the link status of the original interface is down, whether the related route ...

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PUM

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Abstract

The method includes following steps: when two layer 3 equipments pass through Ethernet link connection, one of the layer 3 equipments periodically send link state detection message; after opposite terminal equipment receives the message, it will make response; when the present terminal equipment doesn't receive the response from opposite terminal equipment, this link is considered have a failure, meantime disenable the router whose next-hop address is the address of opposite terminal equipment. The invention can automatically switch the failure link to spare link, and when the network failure recovers, it can switch back.

Description

technical field [0001] The invention relates to network technology, in particular to a method for detecting and processing network link failures. Background technique [0002] When a router is connected to a router or between any two layer-3 network devices via Ethernet, it can be directly connected through an Ethernet cable, or connected through one or more layer-2 switches. as follows figure 1 As shown, if the Ethernet cable is directly connected, because of the line quality or poor contact, such a phenomenon often occurs. It can work normally from RTA to RTB, but there is a failure from RTB to RTA, so RTA will continue Send information to RTB, but RTB cannot return the information, thus causing network failure. The problem is even more serious when connecting through a Layer 2 switch. When the connection between the RTB and the Layer 2 switch fails, the RTA does not know it, which also causes a network failure. After these failures occur, the network cannot automatica...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/26
Inventor 曹阳闫长江瞿祥明
Owner HUAWEI TECH CO LTD