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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: 2012-05-30
BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0046] A method, device, and routing device for avoiding routing black holes provided by embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0047] In the method for avoiding routing black holes provided by the embodiments of the present invention, on the side of the second router device that is a neighbor of the restarted first routing device, such as figure 2 shown, including the following steps:

[0048] S201. The second routing device receives a first link-state packet (Link-State Packet, LSP) message sent by the first routing device after restarting;

[0049] S202. The second routing device extracts the path cost type-length-value (Type-Length-Value, TLV) carried in the first LSP message, and according to the actual distance between the first routing device and the second routing device in the path cost TLV calculating a second path cost value between the first routing device and the second routing devi...

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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 throughthe 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 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, and 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 that if it wants to reach the destination address (such as address D), it needs to 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 the user data arriving at destination address D to routing device B, because routing device B does not have destination address D The routing can only discard the data. This phenomenon is called "routing black hole" (Black hole). Generally, the duration of this phenomenon is relatively short, so it is also called...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/705H04L12/757
Inventor 兰加兴
Owner BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
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