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Link state advertisements transmission methods and network devices

A technology of link state notification and network equipment, which is applied in the field of communication and can solve problems such as LSA aging, route flapping, and link deletion

Inactive Publication Date: 2016-05-04
BEIJING HUAWEI DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the scenario where the system clock of a certain network device is faulty (bug) leading to rapid growth of LSAge, or in the scenario of time processing failure during the aging process of LSAs causing rapid growth of LSAge, or in the scenario of other unknown faults causing rapid growth of LSAge In some scenarios, the LSA will be aged too quickly, and the aging of the LSA will cause the links in the network to be deleted, and then there will be an infinite loop of generating and deleting LSAs in the entire network, resulting in route flapping in the network

Method used

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  • Link state advertisements transmission methods and network devices
  • Link state advertisements transmission methods and network devices
  • Link state advertisements transmission methods and network devices

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Embodiment Construction

[0046] The technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention.

[0047] The terms "first", "second", "third" and "fourth" in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to limit a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

[0048] In the following description, for purposes of illustration rather than limitation, specific details such as specific system architecture...

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Abstract

The invention discloses link state advertisements transmission methods and network devices, relating to the technical field of communications and preventing router oscillation caused by false delete of the link due to too fast aging of the link state advertisements (LSA) in the network. The transmission method comprises the steps that a first network device receives a first LSA sent from a second network device, wherein the value of survival time of the first LSA is N, the first LSA comprises first LSA key information, and N is greater than the value of updated time and is less than the maximum of the survival time; the first network device determines a second LSA in the LSA stored in the first network device according to the first LSA key information, wherein the second LSA comprises second LSA key information, and the second LSA key information and the first LSA key information are the same; the first network device determines, according to a preset mechanism, that the second network device needs to update the first LSA to the second LSA; and the first network device sends the second LSA to the second network device.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a link state notification transmission method and network equipment. Background technique [0002] Open Shortest Path First (OSPF, OpenShortestPathFirst) described in RFC2383 is a link-state-based AS internal routing protocol, which establishes and maintains an adjacency by periodically sending Hello packets between network devices. Link State Advertisements (LSA, LinkState Advertisements) are flooded and diffused between network devices forming an adjacency relationship, so that each network device finally forms the same link state database (LSDB, LinkStateDataBase). [0003] The LSA contains a link state age (LSage) field. The LSage field indicates the lifetime of the LSA (also known as the aging time), including the transmission time of this LSA in the network and the existence time in each LSDB. The maximum value is 3600. After network device A generate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721
CPCH04L45/12H04L45/123
Inventor 龚立艳夏冬冬
Owner BEIJING HUAWEI DIGITAL TECH
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