Method, device and routing equipment for avoiding black holes

A routing and device technology, applied in the field of computer network communication, to achieve the effect of avoiding routing black holes

Active Publication Date: 2011-03-09
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention provides a method, device and routing equipment for avoiding routing black holes, which are used to more reliably solve the problem of routing black holes generated after the router restarts in the prior art

Method used

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  • Method, device and routing equipment for avoiding black holes
  • Method, device and routing equipment for avoiding black holes
  • Method, device and routing equipment for avoiding black holes

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Embodiment Construction

[0041] In the following, with reference to the accompanying drawings, a method, a device, and a routing device for avoiding routing black holes provided by embodiments of the present invention will be described in detail.

[0042] The method for avoiding routing black holes provided by the embodiment of the present invention is on the side of the second router device that is the neighbor of the first routing device that restarts, such as figure 2 Shown, including the following steps:

[0043] S201. The second routing device receives a first Link-State Packet (LSP) message sent by the first routing device after the restart is completed.

[0044] S202. The second routing device extracts the type-length-value (Type-Length-Value, TLV) of the path cost carried in the first LSP message, and according to the actual path cost between the first routing device and the second routing device in the path cost TLV The first path cost value and the preset multiple value corresponding to the first ...

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PUM

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Abstract

The invention discloses a method, device and routing equipment for avoiding black holes. The method comprises the following steps: the second routing equipment computes a second path cost value between the first routing equipment and the second routing equipment according to a first path cost value and a corresponding multiple value in the path cost type length value (TLV) sent by the first routing equipment; the second path cost value meets the condition that when the second path cost value is used for carrying out routing computation, in the same routing, the path cost value of each path which passes through the first routing equipment is greater than the path cost value of each path which does not pass through the first routing equipment; and the second routing equipment forwards a data message through a backup path which does not pass through the first routing equipment according to the second path cost value. The invention ensures that under a narrow measurement mode of the intermediate system to intermediate system (IS-IS) protocol, in a short time after the first routing equipment finishes the restart, the second routing equipment certainly forwards the data message through the backup path which does not pass through the first routing equipment, thereby more reliably solving the problem of routing black holes.

Description

Technical field [0001] The present invention relates to the field of computer network communication, in particular to a method, device and routing equipment for avoiding routing black holes. Background technique [0002] A network is generally composed of multiple routing devices. Different routing devices cooperate with each other to complete the forwarding of user data. If a routing device (such as device A) learns through the routing protocol, it needs to reach the destination address (such as address D) Through another routing device (such as device B), but routing device B does not have a route to destination address D, routing device A forwards user data to destination address D to routing device B, routing device B does not have destination address D The routing can only discard data. This phenomenon is called "routing black hole" (Black hole). This phenomenon generally lasts for a short time, so it is also called transient black hole. [0003] To figure 1 Take the scenario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/18
Inventor 兰加兴
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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